Tomos A5 Engine Parts

 

16 Versions of A55 Engines on US Models

p is pedal (30 mph), k is kick (30 mph)
m is pre-mix gas, o is oil injection
b is black, s is silver
d is dished sprocket, f is flat
w is wide tire, t is thin
e is electric start

p m b d w 
k o s  f t  e   part#   years  models
k m b f t  o 237114  07-13 Sprint  
p m b f t  o 237115  07-13 Sprint
k o b f t  o 237113  08-13 ST, LX
p o b f t  o 237077  08-13 ST, LX
k o s f w e 237071  10-13 Revival, Streetmate, S.mate-R
p o s f w e 237072  10-13 Revival, Streetmate, S.mate-R
k o b f t  o 236889  07-08 ST, LX
p o b f t  o 236767  07-08 ST, LX
k o s d w e 237071  06-09 Revival, Streetmate
p o s d w e 237072  06-09 Revival, Streetmate
k o s d w e 236261  05-06 Revival, Streetmate
p o s d w e 236274  05-06 Revival, Streetmate
k o b d w e 236829  06-08 Arrow-R, 08-09 S.mate-R
p o b d w e 236828  06-08 Arrow-R, 08-09 S.mate-R
k o s d w o 236401  05-05 Arrow
p o s d w o 236406  05-05 Arrow  

In April 2005 Tomos USA sent “A55 upgrade” kits to dealers, to fix idling and other issues. 2005 A55 engines had trapezoidal (slanted top) piston rings. 2006-on had rectangular type rings. 2002-09 wide-tire-model engines had a dished front sprocket, to move the chain away from the tire. 2010-13 wide-tire engines are moved to the left about 14 mm, allowing the use of a flat sprocket.

24 Versions of A35 Engines on US Models

p is pedal (30 mph), k is kick (30 mph)
m is pre-mix gas, o is oil injection
b is black, s is silver
d is dished sprocket, f is flat
w is wide tire, t is thin, x is off road
e is electric start

p m b d w 
k o s  f t  e   part#   years  models xxxx  magneto 12 volt ac
k o  b f t  e 230861  05-05 LX Limited Ed.   11.170.017 80w
p o  b f t  e 000000  05-05 LX Limited Ed.   11.170.017 80w
k m b f t  o
230865  03-06 Sprintxxxx  AET 11.170.001 80w
p m b f t  o 230866  03-06 Sprintxxxx  AET 11.170.001 80w
k o b f t  o 230862  03-06 Tomos, Tomos LX, ST  0.001 80w
p o b f t  o 230863  03-06 Tomos, Tomos LX, ST  0.001 80w
k o s d w e 232771  02-04 Revival A35  xx  11.170.017 80w
p o s d w e 232791  02-04 Revival A35  xx  11.170.017 80w
k m b f x o 233401  02-04 MC50xxx   AET 11.170.001 80w
k m b f x o 230611  98-02 Super Tom  AET 11.170.001 80w
k m b f x o 000000  97-98 TX50 xxxxx AET 11.160.052 50w
k m b f t  o 230283  98-02 Sprint xxx   AET 11.170.001 80w
p m b f t  o 230289  98-02 Sprint xxx   AET 11.170.001 80w
k o b f t  o 229965  98-02 Targa, Targa LX   11.170.001 80w
k o b f t  o 229965  96-97 Targa, Targa LX   11.160.053 80w
p o b f t  o 229731  98-02 Targa, Targa LX   11.170.001 80w
p o b f t  o 229731  96-97 Targa, Targa LX   11.160.053 80w
k m b f t  o 229725  96-97 Sprint  xxxxxxx   IDM 6411 50W
p m b f t  o 229765  96-97 Sprint  xxxxxxx   IDM 6411 50W
k o b f t  o 229572  94-95 Targa, Targa LX   IDM,Iskra,AET
p o b f t  o 229655  94-95 Targa, Targa LX   IDM,Iskra,AET
p m b f t  o 229592  94-95 Sprint  xxxxxxx   IDM,Iskra,AET
k m b f t  o 229587  94-95 Sprint  xxxxxxx   IDM,Iskra,AET
p m b f t  o 229592  93-94 Sprint  xxxxxxx   IDM 6436,6411
k m b f t  o 229587  93-94 Sprint  xxxxxxx   IDM 6436,6411
p o b f t  o 229582  93-94 Sprint TT  xxxxx  Iskra 1215 50w
k o b f t  o 229056  93-94 Sprint TT  xxxxx  Iskra 1215 50w
k o b f t  o 229056  92-93 Bullet, G.Bullet, Colibri 1217 80w
p o b f t  o 227596  92-93 Bullet, G.Bullet, Colibri 1217 80w

In 1996 the carb location changed from center to side mount, making service way easier. 1974-1997 left engine cases had ∅90 stator plate mounts with three M4 screw holes. In 1998 the magneto changed to a “4-star” or “plus sign” design AET 11.170.001. 3 of the 4 coils were for lighting, connected in series, and one coil was for ignition. The wires did not change. The base plate screws changed, from three 4 mm, to two 5 mm. 1998-2002 left engine cases had ∅90 stator plate mounts with both 2 M5 and 3 M4 holes. In Jan 2003 the A35 left engine case changed. A boss for electric start was added. The two left cover centering bushes got bigger, from 037062 (5 mm) to 223440 (10 mm). 2003-2013 left engine cases had ∅90 stator plate mounts with only two M5 screw holes.  

 


1992 logo

Tomos A5 (A35 and A55) engine parts

Here 35 Tomos USA parts manuals are combined into one. Four bike versions (pre-mix kick, pre-mix pedal, oil-inject kick, oil-inject pedal) are indicated by four quantity columns ppoo. Three illustration versions abc show the changes and improvements made over time, from 1992 to 2018, with a being the newest. Newer part versions have higher part numbers, and are listed first (except for ’92-97 magneto).

12 parts catalogs for 1992-2006 models with A35 engines

 

 

 

 

 

11 parts catalogs for 2004-2013 wide-tire models with A55 engines

 

 

 

 

12 parts catalogs for 2007-2013 thin-tire models with A55 engines

 

 

 

 

This is both a spec sheet with applications, and a list of parts for sale. Many things that say “none” in the price are listed for information purposes. The purpose is to possibly find substitutes by knowing the original part specifications. Sometimes parts can have different part numbers, but the difference is something minor that does not matter, or can be adapted. Some folks have parts, or see a part for sale, where the part number is known but not what models it’s for or could fit. 

 


1 a. 2005-18 A55                                 1 b. 2003-06 A35                                  1 c. 1992-02 A35

ox  # qty part#  price
0
abc2 1 222098 $5.00 case gasket
0xab3 6 223440 $6.50 centering bush 9.8×16 2case+2R+2L=6
0xxc3 4 223440 $0.00 centering bus    ‘92-02 2case+2R=4
0abc4 1 232971 $6.00 trans gasket ’03-18, 222087 ’92-02
0abc5 1 027264 $2.00 oil check screw M6 x 10
0xab6 1 230172 $1.50 seal washer copper ∅6 x 12 use fiber
0xxc6 1 044581 $1.00 seal washer fiber ∅6 x 12 ’92-02
0abc7 2 026311 $1.50 oil fill and drain screw M8 x 10
0xab8 2 230173 $0.60 seal washer copper ∅8 x 14 use fiber
0xxc8 2 044582 $1.00 seal washer fiber ∅8 x 14 ’92-02
0xxa9 1 233718 $4.50 elastic sleeve ∅8 x 16 for A55 cyl stud
0xxc9 1 201104 $6.00 rubber insert 1 big, 2 sm holes ’92-97
0xxc9 1 231015 $6.00 rubber insert 1 big hole only   ’98-02
abc10 1 000000 $0.00 left covers are listed below with cases
abc11 1 200294 $5.00 pad for kick start stop peg 12 x 23 x 14
xxc12 3 026573 $0.70 left cover screw M6 x 25 ’92-02
abc12 2 026593 $0.80 allen screw M6 x 35 ’03-18
xab13 1 026636 $0.80 allen screw M6 x 40 ’03-18
xxc13 2 037062 $7.00 centering bush ∅5 x 16  for ’92-02 L cover
abc14 1 026041 $1.50 mount bolt M8-1.00 x 70 kick w/foot pegs
abc14 3 026041 $1.50 mount bolt M8-1.00 x 70 pedal
abc15 2 026043 $1.50 mount bolt M8-1.00 x 80 kick w/foot pegs
abc16 5 031933 $0.20 mount washer ∅8
abc17 4 030049 $1.30 mount nut M8-1.00 self-locking
abc31 14 026573 $0.70Allen screw M6x25
abc32 1 026582 $1.20 Allen screw M6x65

ox  # qty part#  price       A55 top end
xx
a18 4 233716 $6.50 cylinder step-stud A55 M7/6 x 115 ’04-18
xxa19 1 233714 $4.00 cylinder base gasket A55
xxa20 1 233711 $190  cylinder w/piston A55 (A56-B) no ex. studs  
abc21 2 208201 $2.00 exhaust stud M6x24 actually M6x28
xxa22 1 233702 $68.0 cylinder head A55
xxa22 1 233717 $4.00 head gasket A55 copper replacement 633997
xxa23 1 044617 $3.00 spark plug A55 NGK BR8ES = Bosna FE80R
xxa23 1 044618 $3.00 spark plug A55 NGK BR6ES for slow riding
xxa24 4 031509 $0.20 head washer A55 ∅6
xxa25 4 031075 $0.60 head nut A55 M6 x 6 =236639
xxa26 1 233709 $65.0 piston A55 ’06-18 37.95 rectangular rings
xxa26 0 236805 none  piston A55 ’04-06 37.95 trapezoidal rings
xxa27 2 236802 $$9.0 ring 38×1.5 GN <A35, A55 ’07-on
xxa27 0 233707 $14.0 ring 38×1.5/1.3 trap. upper w/coating
xxa27 0 233708 $14.0 ring 38×1.5/1.3 trap. lower <for A55 04-06
abc27 2 222041 $$9.0 ring 38.0 x 1.5 GN same as 236802
xxa28 1 233762 $12.0 piston pin ’05-18 11.98 x 32.0
xxa29 2 233763 $2.00 piston clip C-type tail-less
xxa33 0 233721 none  intake metal   id 14.5-14.5 recalled Apr ’05
xxa34 0 233721 none  intake rubber id 14.5-18    recalled Apr ’05
xxa33 1 233721 $59.0 intake 1-pc id: 14.5-15 ’06-18 & ’05 kit
xxa33 1 233721 $38.0 intake 1-pc id: 14.5-14 reproduction
xxa35 1 221890 $1.50 hose clamp 20-35
xxa36 1 233715 $2.00 intake gasket A55 replacement 633986
xxa37 2 026690 $1.50 intake screw M6x16 BA ’07-09 see 027268
xxa37 0 027268 $0.80 substitute screw M6x16 philips
xxa37 0 026561 $0.70 intake screw ’10-18 M6x16 allen
xxa38 2 031932 $0.25 lock washer  ∅6
ox  # qty part#  price       A35 top end
x
bc18 4 205386 $2.20 cylinder stud A35 M7 x 115 ’92-06
xbc19 1 223796 $3.00 cylinder base gasket A35
xbc20 1 229402 $190  cylinder w/piston A35 
abc21 2 208201 $2.00 exhaust stud M6x24 actually M6x28
xbc22 1 223466 $0.00 cylinder head A35
xbc23 1 044511 $3.00 spark plug A35 NGK BR6HS = Bosna F75
xbc24 4 044154 $0.20 head washer A35 ∅7
xbc25 4 031076 $0.60 head nut A35 M7 x 6
xbc26 1 223747 $65.0 piston A35 ’92-06 38.0 with windows 
xbc26 0 227334 $0.00 piston A35 ’92-06 38.5 oversize
abc27 2 222041 $$9.0 piston ring 38.0 x 1.5 GN =236802
xbc27 0 227758 $12.0 oversize ring 38.5 x 1.5 GN

xxb28 1 207408 $12.0 piston pin ’03-06 11.98 x 30.9 (11.978-11.981)
xxc28 1 227501 $12.0 piston pin ’92-02 11.98 x 30.9 (11.973-11.982)
xbc29 2 032039 $1.50 piston clip G-type with tail
xbc30 1 222204 none  right cover   see case sets below

xbc33 1 222238 $33.0 reed valve A35 <also fits Peugeot, Polini, Daelim
xbc34 1 223748 $3.00 reed valve gasket
xbc35 1 227592 none  intake A35 center-mount 
xbc35 1 229707 none  intake A35 side-mount for premix       ’96-o6 
xbc35 1 229716 $21.0 intake A35 side-mount for oil injection ’96-o6
xbc35 1 230815 none  intake A35 side-mt for o.inj restricted? ’96-o6
xbc36 4 031931 $0.25 lock washer ∅5
xbc37 4 026566 $1.50 reed valve screw M5 x 20 allen
ox  # qty part#  price
x
ab40 1 230812 $6.00 upper protector rubber <protects wires
xab41 1 230968  none  lower protector metal <protects oil lines
xab42 1 230917 $5.00 rubber insert no oil line holes ’03-18
xab42 1 230811 none  rubber insert w/oil line holes ’03-18
xxa43 1 205945 none  plug for kick cover 24mm ’08-18
xab45 1 230901 none  oil pump cover black <also covers no oil pump
xab45 1 230792 none  oil pump cover chrome
xab45 0 230901 $12.0 oil pump cover unpainted white plastic
xab46 1 027271 $1.50 screw M5 x 30 BA button-head allen
xab46 1 027271 $0.70 substitute screw M5 x 30 philips
xxa47 1 233411 none  flat block off plate for Sprint (no oil pump)
xxa48 2 233368 none  screw for Sprint plate 3.0×14 wood screw
xxa50 1 236459 $19.0 gasket set A55 replacement set 633901
xbc50 1 227331 $19.0 gasket set A35 replacement set

 

pk Tomos#  price   A55 2004-18  pins left ∅10, right ∅10
01 230940   none  case set 3-pc kick black, 3+2 hole
10 230950   none  case set 3-pc ped  black, 3+2 hole
01 233182   none  case set 3-pc kick plain, 3+2 hole
10 236540   $125  case set 3-pc ped  plain, 3+2 hole

11 236540L  $45.0 left case L xx ’04-18 plain, 3+2 hole
11 236540R $23.0 right case R   ’04-18 plain (unpainted)
10 236540C $95.0 right cover C  ’92-18 pedal unpainted
01 236999   none  L cover plastic blk kick ’10-18 Sprint, oil inj, e-start
10 237131   none  L cover plastic blk ped  ’10-18 Sprint, oil inj, e-start
01 230859   none  L cover blk kick ’03-09 oil inj, ’07-09 Sprint, e-start
10 230871   $75.0 L cover blk ped  ’03-09 oil inj, ’07-09 Sprint, e-start

pk Tomos#  price   A35 2002-06  pins left ∅10, right ∅10
0
1 230983   none  case set 3-pc kick blk or silv, 3+2 hole
10 230982   none  case set 3-pc ped  blk or silv, 3+2 hole
10 230982C none  R cover x ∅10 ped  black ’02-06  use 236540C
01 230960   $70.0 left cover ∅10 kick black ’03-06 Sprint (premix)
01 230961   none  left cover ∅10 kick black  same as 230859
230859
10 230925   none  left cover ∅10 ped  black ’03-06 Sprint (premix)
01 230966   
$70.0 left cover ∅10 kick silver ’02-07 e-start models
10 230967   $65.0 left cover ∅10 ped silver ’02-07 e-start models
01 222233   none  left cover ∅10 kick black ’03-06 MC50 (premix)
pk Tomos#  price   A35 1992-04   pins left ∅5, right ∅10
01 227332   none  case set 2-pc kick black 3-hole to ’97 then 3+2
10 227763   none  case set 2-pc ped  black 3-hole to ’97 then 3+2
11 227763L  $55.0 left case L x  p/k  black 3-hole to ’97 then 3+2
11 227763R $40.0 right case R  p/k  black ’92-06
01 222202   none  R cover  ∅10 kick black ’92-02  fits ’92-18
10 222204   none  R cover  ∅10 ped  black ’92-02  use 236540C

01 223471   none  left cover ∅5 kick black kick ’93-02 Sprint (premix)
10 222235   none  left cover ∅5 ped  black ’93-02 Sprint (premix)
01 223472   none  left cover ∅5 kick black kick ’92-02 oil inject models
10 222387   none  left cover ∅5 ped  black ’92-02 oil inject models
pk Tomos#  price   A3 1985-91   pins left none, right ∅6
11 219627   none  case set 2-pc ’85-91 A3 black for 6302, 3-hole
11 219627L  none  left case L  xx ’85-91 A3 plain for 6302, 3-hole
11 219627R none  right case R    ’85-91 A3 plain for 6302
11 217305   $35.0 left cover xx  ’78-91 A3 black oil inject
11 217205   none  left cover xx  ’85-91 A3 black pre-mix
pk Tomos#  price   A3 1974-85   pins left none, right ∅6
11 217211   $80.0 case set 2-pc ’78-85 A3 black for L17, 3-hole
11 209115   $75.0 case set 2-pc ’74-84 A3 plain for L17, 3-hole
11 209115L  $35.0 left case L xx  ’74-84 A3 plain for L17, 3-hole
11 209115R $35.0 right case R x ’74-84 A3 plain for L17
11 209115C 90-35 right cover C  ’74-91 A3 plain
11 209026   $35.0 left cover xx  ’74-86 A3 plain pre-mix
11 217305   $35.0 left cover xx  ’78-91 A3 black oil inject

Evolution of Tomos Engine Cases

1973 The first A3 was sold in Yugoslavia. Its design is based on 1950-60’s Puch, with the same piston, crank bearings, stator plate and other things. The two-speed automatic transmission is Tomos designed with a coaxial final drive. The pedal shaft goes through the center of the drive shaft.

1974-85 case set 209115 for A3 engine has L17 (angular contact) 3-piece crank bearings, 10 mm wide and difficult to remove and install. The thickness of the center case gasket affects the tightness or looseness of the bearings. The cases are unpainted aluminum, and covers are painted silver for the Automatic and Bullet models.

1977-85 case set 217211 for A3 engine is the same except the cases and covers are painted black for the Silver Bullet model.

1985-91 case set 219627 for A3 engine has 6302 (full contact) 1-piece crank bearings, 12 mm wide and easy to remove and install. The thickness of the center case gasket does not affect the tightness or looseness of the bearings. This was first on the 1985 Golden Bullet. The next year 1986 it was on all models. From 1985 to 2002 all cases and covers were painted black.

1987 The first kick model (without pedals) A3 was the 1987 Bullet TT. The A3 kick start mechanism was outside the engine on the left side. The kick version pedal shaft was longer on the left side and shorter on the right, but the engine cases were the same.

1992-94 case sets 227332 and 227763 for A35 engine are wider and have improvements. The right cover is wider for the wider gears. It has a different shape and a smaller front bearing. The left cover now has 5 mm centering pins, to reduce wear on the oil injection pump centering disk.

1994-97 case sets 227332 and 227763 for A35 engine are the same except there are timing marks near the left stator screw. They are for using a strobe light, with the engine running, to check the ignition timing on CDI (electronic) ignition. Before 1994 no case marks were needed because the ignition had points. The timing was checked with the engine not running, using a dial gauge in the spark plug hole. The part number did not change because the new version can replace the old one.

1998-02 case sets 227332 and 227763 for A35 engine are the same except the stator plate mounts. Before 1998 there were just three stator plate mounts with M4 threaded holes and a centering lip for a 90 mm diameter stator base plate, Bosch-Puch compatible. From 1998 on, the generator coils design changed to plus sign type for improved lighting. That required 2 stator plate mounts, not 3. So two M5 threaded holes with centering lips were added to the left engine case. From 1998 on, left cases had two M5 plus three M4 holes, so either new 2-screw or old 3-screw stators would fit. The part number did not change because the new version can replace the old one.

2002-06 case sets 230982 and 230983 for A35 engines are the same except they’re electric-start-ready. They have left case mounts for electric start, stronger and bigger left covers with starter shaft bushings and bigger 10 mm centering pins. The left case has pulser mounts but they were not used. This was first on the 2002 Revival, painted silver. Then in 2003 it was on the other models, Sprint, Tomos and Tomos LX (later called Sprint, ST and LX), painted black. 

2004-07 case sets 230940 and 230950 for A55 engines are the same except for the transfer ports and the addition of ignition pulser mounts. The A55 has 4 transfer ports instead of two, for more efficient cylinder filling (to meet emission standards). So the transfer channels are wider, and the cylinder base gasket is different. The A55 also had a more sophisicated CDI ignition, with pulser-triggered variable timing and a rev limiter. The A55 was first on the Revival-TS in 2004, then on the Streetmate and Arrow in 2005, and then on all models in 2007. The engine cases and covers are painted silver on the Revival, Streetmate, Arrow and black on the Sprint, ST, LX, Streetmate-R and Arrow-R. 

2004-07 case sets 233182 and 236540 for A55 engines are the same except they are unpainted.

2008-18 case sets 230940 and 230950 for A55 engines are the same except they’re made in India instead of Slovenia. The India made A55 engines are identified by the bunny logo on the clutch cover, and the inspection sticker on the bottom. 

 


2 a. ’05-18 A55, b. ’03-06 A35,  c. ’92-02 A35

ox  # qty part#  price
0abc1 1 223421 $125. crankshaft original new
0abc2 1 035548 $9.00 piston pin bearing 12 x 15 x 15(14.7)
0abc3 0 212959 $5.00 crank shim (only if needed) 17 x 24 x 0.20
0abc3 0 212958 $8.00 crank shim (only if needed) 17 x 24 x 0.15
0abc3 0 212957 $9.00 crank shim (only if needed) 17 x 24 x 0.10
0abc4 2 035070
$12.0 crank bearing 6203 C3  17 x 40 x 12
abc5a 1 044838 none  crank seal L  17-35-7/6 use 17-35-7TC
abc5b 1 036555 $7.50 crank seal R 17-35- 7 use 17-35-7TC
0abc5 1 000000 $11.0 crank seal 0 17-35-7TC
0abc6 1 223468 $4.00 thrust washer 14 x 20 x 2
0abc7 1 223470 $13.0 clutch drum bushing 14 x 16 x 20.5
0obc8 1 223423 none  drum + #1 gear ’92-07 already balanced
0ooa8 1 223423 none  drum + #1 gear ’08-18 not balanced see note 1
0abc8 1 000000 none  drum + #1 gear ’08-18 machined, balanced
0abc9 1 035554 $14.0 roller clutch (1-way bearing) HF1416 14-20 x 16
abc10 0 209073 $5.00 clutch shim 19.2 x 26 x 0.30 rarely needed
abc10 0 209119 $4.00 clutch shim 19.2 x 26 x 0.50 rarely needed
abc11 3 223432 none  clutch segment #1
abc12 3 223562 none  clutch segment #2
abc11 3 223432 $12.0 clutch segment replica
abc12 6 223434 $4.00 clutch segment pin
abc13 1 223429 $35.0 clutch hub #1
abc14 1 209002 $6.00 clutch spring-washer
abc15 6 209039 $5.00 clutch brake strip
abc16 1 209013 $6.00 clutch spring green (stiffer, thick wire)
xxa16 1 223769 $3.50 clutch spring red (softer) see note 2
abc17 1 223435 none  clutch hub with #2 driving gear
xxa18 1 227849 $80.0 clutch assy #1 green ’04-18 A55, ’02-04 A35 Rev.
xbc18 1 227018 none  clutch assy #1 green ’92-06 A35
xxa18 1 223436 none  clutch assy #2 red    ’04-18 A55, ’02-04 A35 Rev.
xbc18 1 227019 $90.0 clutch assy #2 green ’92-06 A35
abc19 1 032083 $2.00 circlip external 28 x 1.2
abc20 1 031978 $1.00 thrust washer B10
abc20 1 031848 $0.80 spring ring B10
abc21 1 215487 $2.00 nut M10x1 17-hex
abc22 1 035202 $6.00 ball bearing 608 8x22x7

Note 1: The clutch double drum is made out of stamped sheets welded together and then machined in the center and inside of the outer wall. From 1992 to 2007 they were always made correctly with the two drums both centered. The outer walls were thick everywhere because not much inside machining was needed. Starting in 2008 most double drums were made incorrectly, with one or both drums off center. That made the walls thin on one side after machining. The thin wall would occasionally fail at one of the oil holes, casing catastrophic damage. More often the bike would vibrate at high rpm, causing the mirrors to get blurry, the rider’s hands and feet to get numb, and the speedometer needle to go crazy. The remedy is to machine the outside or the outer wall, but only the high area, not the lowest parts. There the wall is already thin from the inside machining done at the factory. More about this is in Tomos Transmission Service.

Note 2: The softer red 223769 spring in the #2 clutch on A55 models causes an early shift, at about 8 mph, but sometimes 5 mph, too soon. A green 209013 spring is stiffer and delays the shift until 10-12 mph. Staying in #1 gear longer improves acceleration and hill climbing. But after the #2 clutch shoes get worn out, the stiffer green spring can sometimes cause chattering, shaking the bike violently. That might be why Tomos chose a red spring for the #2 clutch on A55, despite it’s poor performance accelerating and climbing hills.

 


3 a. ’05-18 A55, b. ’03-06 A35,  c. ’92-02 A35

ox  # qty part#  price
0
abc1 1 223458 $35.0 countershaft 
0abc2 1 044835 $2.00 woodruff key 5 x 5 x 12
0abc3 1 035072 $7.00 ball bearing 6201
0abc4 1 032077 $2.00 circlip 20 x 1.0 external
0abc5 1 223463 $48.0 1st gear cage
0abc6 8 209063 $2.50 roller D5
0abc7 1 222209 $32.0 starter cage
0abc8 1 223121 $5.00 countershaft “J” spring
0abc9 1 035600 $13.0 1st gear bushing ’92-07 20.4 x 23 x 14.7
xxa10 1 227194 $64.0 1st gear driven   ’08-18 all cast iron, no bushing
abc10 1
227194 $77.0 1st gear driven   ’92-07 with center bushing #9
abc11 1 223461 $50.0 2nd gear driven key groove center
abc12 1 209062 $5.00 tab washer 14 x 26
abc13 1 200141 $5.00 countershaft nut M14-1.00 x 7 19hex
abc14 1 223469 $3.00 thrust washer 10 x 16 x 2
abc15 0 209075 $5.00 shim as needed  10.1 x 14 x 0.2
abc15 0 209076 $5.00 shim as needed 10.1 x 14 x 0.5
abc16 1 035031 $6.00 ball bearing 6000 
abc17 1 209078 $18.0 sprocket flat 26 original, flat center, fits tight
abc
17 0 209078 $15.0 sprocket flat 26 K Star, wavy center, loose fit
abc17 0 209078 $12.0 sprocket flat 25 generic, wavy center, loose fit
abc17 0 209078 $12.0 sprocket flat 27 generic, wavy, loose fit, black
xab17 1 230788 $34.0 sproc dished 26 original, flat center, fits tight
abc18 1 209079 $3.00 tab washer 22 x 44 x 1
abc19 1 209080 $5.00 sprocket nut M22-1.00 x 8 30hex
abc20 1 209077 $5.00 distance bush ’76-07 <no cut    see note 1
xxa20 1 209077 $7.00 distance bush ’08-18 <with cut see note 2
abc21 1 036620 $9.00 seal 35 x 47 x 7 <this almost never leaks
abc22 1 035037 $13.0 ball bearing 6006
xxa23 1 223453 $110. drive shaft ped ’08-18 all cast iron sold as is
obc23
1 223453 $120. drive shaft ped ’92-07 tool steel center
abc23 1 223456 $110. drive shaft kick ’92-18 all cast iron, no teeth 
abc24 1 035502 $17.0 L bearing SCE 109P  L end has a rubber seal
abc25 1 035503 $15.0 R bearing SCE 108  no seal on either end
xxa31 1 033007 $1.50 o-ring 30 x 1.5 (33od) ’08-18 <for 209077 w/cut

Note 1: From 1974 to 2007, oil was sealed by metal-to-metal. The flat inner side of the sprocket #17 pressed perfectly against the bearing #22, as long as the nut #19 was tight. Oil leaks there were uncommon. But after 2007 the sprocket center was made wavy, causing leakage.

Note 2: In 2008 Tomos remedied the oil leak (caused by wavy sprockets) by cutting a bevel (chamfer) in 209077 and adding rubber o-ring 033007. See Service/Tomos/A55 Trans Oil Leak. Many of the first 209077’s were not cut deep enough. They pinched and severed the o-ring when the nut was tightened. The ones offered here are cut correctly.

Drive shaft: The coaxial drive “shaft” is more like a drive “gear”. It is hollow, with the start shaft (pedal or kick) going through it’s center. On a pedal version the center has a ring of teeth. The teeth were made of tool steel up to 2007, and never broke. After 2007 the teeth were made of cast iron, and sometimes broke off. When all the teeth break off, the bike can still be started with a backwards kick, but the pedals move forward freely and do not propel the bike. That’s not so bad, but the iron chips in the oil can damage the gear teeth, sometimes catastrophically. Once the chips are cleaned out the bike can have a normal life with motor only.

 


4 a. ’04-18 A55, b. ’03-06  A35, c. ’92-02 A35        a. ’04-18 A55, b. ’03-06 A35, c. ’92-02 A35

oxx  # qty part#  price
0xxa1p 1 237629 $44.0 pedal shaft 340 ’04-18 catalytic exhaust
0xxb1p 1 230913   none pedal shaft 270? 03-05 e-start-ready
0xxc1p 1 223452   none pedal shaft 260 ’92-02 oil injection
0xxc1p 1 233450   none pedal shaft 240 ’92-02 premix (Sprint)

0abc1k 1 223447   none start shaft  205 ’92-18 kick start version

0abc2p 1 205702 $3.00 thrust washer 16 x 23 x 2.0
0abc3p209048 $9.00 claw collar spring
0abc4p 1 209047 $22.0 ratchet block   see note 1
0abc4k 1 209047 $22.0 ratchet block kick

0abc5p 1 217584 $23.0 chain sprocket #35 25T 
0abc6p 1 217582 $18.0 chain #35 x 32 link see note 2
0abc7p 1 223448 $0.00 distance bush ∅17 ∅20 x 27?
0abc8p 2 032073 $1.50 circlip 16 x 1 external
0abc9p 1 206391 $3.00 shim xxxxxxxx  16 x 24 x 1.00   
abc10p 0 209087 $5.00 shim as needed 16 x 24 x 0.20   
abc10p 0 200175 $5.00 shim as needed 16 x 24 x 0.50   
abc
11k 1 223473   none kick start return spring
abc
12k 1 221406   none kick start hub black
abc
12k 1 205812   none kick start hub chrome
abc
13k 1 221405 $34.0 kick start lever black
abc
13k 1 230461   none kick start lever chrome
abc
13k 1 237189   none kick start lever assy with 11-20
abc14k 1 
223602 $0.00 kick lever rubber cover
abc
15k 1 260216 $0.00 kick lever retract pin
abc
16k 1 260217 $0.00 kick lever retract spring 
abc
17k 1 202726   none kick pin bare
abc
18k 1 202723   none kick pin spacer 
abc19p 2 200185 $0.30 washer 7 for 206714 or 219440
abc19k 1 200185 $0.30 washer 7 for 202726

abc20p 2 031076 $0.50 Nut M7 for 206714 or 219440
abc20k 1 236457 $1.50 Nut M7 self-locking for 202726
oxx  # qty part#  all cranks are 6¼ length, 5¼ reach, ¾ offset 

xoa21p 1 230291   none crank set chro. ’08-189.5 India
xxb21p 1 230291 $45.0 crank set chro. ’98-079.5 Netherlands
abc21p 0 000000 $30.0 crank set chro. #513  9.0 pin
abc21p 0 000000 $17.0 crank LH  chro. #513L 9.0 pin
abc21p 0 000000 $17.0 crank RH chro. #513R 9.0 pin
xoa21p 1 230292   none crank set black ’08-18 9.5 India

xob21p 1 230292   none crank set black ’03-07 9.5 Netherlands
xxc21p 1 229660   none crank set black ’94-02 9.5 pin

abc21p 0 000000 $30.0 crank set black #514  9.0 pin
abc21p 0 000000 $17.0 crank LH  black #514L 9.0 pin
abc21p 0 000000 $17.0 crank RH black #514R 9.0 pin

xxc21p 1 229216   none crank LH black ’94-02 9.5 pin
xxc21p 1 229217   none crank RH black ’94-02 9.5 pin
xxc21p 1 222104   none crank LH black ’92-93 9.5 pin
xxc21p 1 222103   none crank RH black ’92-93 9.5 pin
xxc22p 1 222655   none pedal set black block   ’92-02
xab22p 1 222655 $27.0 pedal set Union block ’05-07 Rev, Sm.

xab22p 1 222655   none pedal set gray plastic ’03-08 ’08-12 Rev.

xxa22p 1 222655   none pedal set black plastic ’08-18 most
abc
22p 0 000000 $18.0 pedal set black classic #41124
abc22p 0 000000 $18.0
pedal set black block #400000
abc22p 0 000000 ..none
pedal set black plastic #41201
abc23p 2 206714 $3.00 pedal pin bare 9.5 mm = 219440
abc23p 0 000000 $2.00 pedal pin assy #pin9.5 9.5 mm
abc23p 0 000000 $2.00 pedal pin assy #pin9.0 9.0 mm
abc24p 1 200266 $7.00 seal ring 16 x 24 x 7
abc25p 1 209224 $1.50 thrust washer 16 x 26 x 1.0  
abc26p 1 209099 $3.50 spring   goes outside before cup
abc27p 1 209096 $3.00 cup goes outside after spring
abc27p 0 222809   none cup dark outside after spring
xxa28p 1 237318 $8.00 tube 16x20x60 ’08-18 A55 =230915

xab28p 1 230915 $8.00 tube 16x20x60 02-04 Rev, 05-07 A55

Note 1. The ratchet block slides side-to-side to engage or disengage the pedals. It has a “ring of ramps” on the right end that engages when pedaled backward, for kick starting the engine. On a Tomos pedal model, the ratchet block also has a left ring of ramps that engages when pedaled forward for pedaling. On a kick model ratchet block does not have a left ring of ramps.

 Note 2. The A5 (A35 and A55) internal pedal chain and sprockets are wider than A3 ones. A5 has a 3/8 x 3/16 32 link chain ANSI#35. A3 has a 3/8 x 5/32 32 link chain.

 


5. a. 2004-18 A55                                              b. 2003-06 A35                                          c. 1992-02 A35

ox  # qty part#  price
0xxa1 1 236513 $34.0 oil pump Dellorto S37 sinistra ’07-18
0xbc1 1 217310 $48.0 oil pump Dellorto S27 sinistra ’92-06 w/2,3,4

0xbc2 1 217311 $11.0 banjo Dellorto w/check ball
0xbc3 1 217312   none banjo bolt Dellorto M7/6 x 18 10hex
0xbc4 1 000000   none seal washer 7 x 11 was sold with banjo bolt
0xab5 2 026697 screw M5 x 15 BA (buttonhead allen)
0xxc5 2 027250 $0.70 screw M5 x 15 phillips

0abc6 2 031867 $0.25 lock washer 5
0xxc7 1 223474 $0.00 oil pump cover ’92-02
0xxc8 1 217314 $5.00 cover grommet ’92-02 for oil hoses
0xxc9 1 027262 $0.70 screw M5 x 35 phillips ’92-02
xxa10 4 217313 $1.50 crimp clamp 5 x 6 ’07-13 thin  see note 1
abc10 4 217313 $1.50 crimp clamp 5 x 7 ’92-06 thick see note 1

abc11 1 044472 $2.00 oil hose A 170 mm from pump to engine
abc12 1 044472 $7.00 oil hose B 700 mm from tank to pump
xxc13 1 219211 $0.00 guide 11 x 19
abc14 1 209894 $0.00 frame grommet 9 x 17
abc15 1
222396 $34.0 oil tank bare ’92-18 most
abc15 1 222396 $20.0 oil tank bare ’92-18 good-used
abc15 1 222396 $40.0 oil tank assy ’92-18 good-used w/16-22

abc16 1 208389 $12.0 oil tank cap bare
abc17 1 217321 $3.00 oil cap insert
abc18 1 217322 $8.00 oil cap filter
abc19 1 217319 $5.00 spigot bolt
abc20 1 227499 $2.50 rubber tube gasket
abc21 1 227498 $1.50 rubber tube cap
abc22 1 031075 $0.40 nut M6
abc23 1 044419 $0.80 sheet screw 4.2 x 16
abc24 1 031930 $0.20 plain washer 4
xxc25 1 217308 $12.0 clutch (pump drive disk) 18 x 6.5
abc26 1 227393 $2.50 shim washer (if needed) 20 x 24 x 0.5
xxa27 1 044472 $0.00 oil hose from joiner to pump 250 mm
xxa28 1 233116 $0.00 oil hose joiner
xxa29 1 044472 $0.00 oil hose from tank to joiner 320 mm
xab30 1 031075 $0.00 oil tank clip-nut Revival M5
xab31 1 232746 $0.00 oil tank Revival
xab32 1 031922 $0.20 oil tank washer Revival 5
xab33 1 236269 $0.00 oil level sensor Revival
xab34 1 026697 $1.00 oil tank screw Revival M5 x 16 BA

Note 1: The 217313 oil hose clamps require a special crimping pliers to install. 

 


6 a. ’04-18 A55 magneto parts                                               b. ’98-06 A35 magneto parts

a. 2004-18 A55 magnetos 12V 80w, 2 M5 screws
5 wires: red blade, yel, w/r 2-pin, pulser: wht, blk bullets
233735 none India Kinetic w/ring gear ’10-18 all
230842 none generic xxxx w/ring gear ’08-09 all  see note 1
233720 $200 AET 11.170.026 w/ring gear ’07-08 elec-start
4 wires: black blade, yellow blade, pulser: wht, blk bullets
233735 $230 AET 11.170.027 no ring gear ’07-08 no e-start

b. 1998-06 A35 magnetos 12V 80w, 2 M5 screws
3 wires: red blade, yellow, white/red 2-pin, no pulser

230842 $190 AET 11.170.017   w/ring gear ’02-06 elec-start
230842 none India M1100000 w/ring gear, replacement
2 wires: black blade, yellow blade, no pulser
232976 $190 AET 11.170.001 has #3 ’03-06 no e-start
230327 $190 AET 11.170.001no #3  ’98-02 no e-start

xxa1   1 243101 $70.0 flywheel A55 generic   with ring gear M26-1.5
xxb1   1 230965  none flywheel A35 AET 11.170.017 w/gear M26-1.5
xxb1   1 230329  none flywheel A35 AET 11.170.001 no gear M26-1.5
xxa2   1 243100  none stator for A55 5-wire generic, + type w/pulser
xxb2   1 230964  none stator for A35 AET 11.170.017 plus sign type
xxb2   1 230328  none stator for A35 AET 11.170.001 plus sign type
xab3   1 224196 $4.00 rubber insert grommet 
xxa4   1 243102 $26.0 pulser A55 AET 16.754.105
xab7   1 000000 $14.0 stator plate bare AET 16.721.010 M6 coil holes
xab7   1 000000 $10.0 stator plate bare Kinetic M5 coil screw holes

xxa8   2 000000 $1.00 coil pack screw AET M6 x 25 phillips
xxa8   2 000000 $0.60 coil pack screw Kinetic M5 x 25 phillips

abc
9   1 215487 $1.80 flywheel nut M10-1.0 17-hex ’93-09 Sprint
xab10 1 230916 $0.00 mounting flange <prevents wires from rubbing
xab11 2 026657 $1.00 stator screw M5x15 allen <use loctite
xab12 2 031508 $0.20 washer 5
abc13 1 200048 $4.00 flywheel key roller D3x4  
abc14 1 229918 $2.50 flywheel washer 10 x 17 x 1.2 use 031934
xab15 1 230813 $8.00 flywheel nut, oil pump ’03-09 oil inject, ’10-18 all
xxa16 2 233719 $0.00 pulser spacer ∅7 ∅10 x 10
xxa17 2 236389 $0.80 pulser screw M6x25 phillips
xab24 1 232967 $5.00 ground wire 7″ w/∅6 eyelets see note 2
xxa30 1 233729  none cdi-coil A55 AET-Iskra 16.754.147 ’05-07 see note 3
xxa30 1 233729 $75.0 cdi-coil A55 Ducati Energia India   ’08-18 see note 4
xxb30 1 230627  none cdi-coil A35 AET-Iskra 16.754.114 ’03-06 see note 3
xxb30 1 230627  none
cdi-coil A35 Flash India C0400000 replacement
xxb30 1 230627 $75.0 cdi-coil A35 generic Taiwan replacement see note 5
xab31 1 044528 $3.00 spark plug wire copper core 350-430 mm (14-17″)
xab32 1 210175 $2.00 plug cap boot
xxa33 1 243451 $5.00 spark plug cap
NGK-replica w/resistor ’05-18
xxa33 1 211977 $5.00 sp. cap 243451 NGK-replica w/resistor ’05-18
xbc33 1 211977 $6.00 spark plug cap plain no resistor plastic ’92-06

xab34 2 026701 $1.00 coil screw M5x12 BA (buttonhead allen) use 026657
xab34 0 026657 $1.00 coil screw M5x15 allen
xab35 2 031508 $0.20 washer 5

Note 1. The generic magneto #230842, original equipment on all 2009 Tomos bikes, has a pulser coil. The India M1100000 replacement magneto, also #240842, does not have a pulser coil. The replacement 230842 is the same as no-pulser AET 11.170.017 magnetos #230842 on 2002-04 A35 Revival and 2005 LX Limited. Tomos re-used a 2002 part number on a 2009 item that was not interchangeable. The external pulser is separate from the internal stator and can be replaced separately. But the flywheel needs to have the raised outer strip that triggers the pulser. The original equipment 2009 flywheel does, but the replacement with the same part number does not.

Note 2. The ground wire is important. It prevents damage to the electronic ignition if the engine becomes loose in the frame. The high voltage sparks that jump the gap of the spark plug have to go to the frame and then back to the coil to complete the circuit. When the engine is loose with no ground wire, there can be sparks between the engine and frame. Or sparks can jump from the engine case to any nearby engine wire that leads to the frame, including the electronic CDI unit wires. 

Note 3. CDI-coils have the electronic control unit and the transformer spark coil combined into one piece. ’94-06 A35 CDI-coils had 2 wires, source and ground. ’04-18 A55 CDI-coils had 4 wires, source, ground, and 2 for the pulser (sensor coil). They also had a 10000 rpm rev limiter in the electronic circuit.

Note 4. The Ducati Energia India CDI-coil for A55 has a history of failure of roughly one out of ten. The rev limiter sometimes happens at a very low rpm instead of very high. On some the bike will only idle or go slow, and misfire and cut out otherwise. On some it will be intermittent spark, where the engine runs for maybe a second and then cuts out. Having a resistor plug and/or a resistor plug cap, and an engine to frame ground strap helps prevent electronic failure. Because of the failure rate, the Ducati Energia India CDI-coil is only sold without any guarantee.

Note 5. The generic Taiwan CDI-Coil for A35 has not been evaluated. It is not known how long it lasts or performs. Because of that, it is only sold without any guarantee.

Plus sign type stators came out in 1998. The 4 outward facing coils were composed of three lighting coils in series and a separate ignition source coil. This is two independent generators, lighting and ignition combined into one unit. The volts and watts refer to the lighting output.

 

Left engine case determines what magnetos could fit.
’74-91 A3 and ’92-97 A35 left case had only 3 M4 stator  holes. It can only take a 3-bolt 90 mm stator.
1998-06 A35, ’04-18 A55 left case had 3 M4 and 2 M5 holes. It can take either 3-bolt or 2-bolt stators.

 


3.7 c. ’92-97 A35 magneto parts

 


ab cd ef  #/link   price  ’92-97 A35 Magnetos 3 M4 stator screws
100000 229444  none AET 11.160.152 12V 50w CDI ’97-98 TX50
010000 229521  none AET 11.160.053 12V 80w CDI ’96-97 Targa, LX
001000 222010  none AET 1215 xxx 12V 50w points ’94-95 Sprint
000100 222704  none AET 1217 xxx 12V 80w points ’92-95
000010 229469  none IDM 6411 xxxx  12V 50w CDI ’94-96 Sprint

00000
1
221005 $220 IDM 6436 xx  12V 75w points ’93-94 Sprint
ab cd ef  #/link   price  ’92-97 A35 Stators 3 M4 stator screws
110000 229526   none stator AET 11.160.052 and 053
001000 223168   none stator AET 1215 has one lights coil
000100 223171   none stator AET 1217 has two lights coils
000010 229471   none stator IDM 6411 ∅90 x ∅94
000001 221312   none stator IDM 6436 ∅80 x ∅94 says CEV 13923
ab cd ef  #/link   price  ’92-97 A35 Flywheels (Rotors)
100000 229484   none AET 11.160.052 ∅90 M26-1.5
010000 229527   none AET 11.160.053 ∅90 M26-1.5
001000 223176   none AET 1215 xxxx  ∅90 M26-1.5
000100 223173   none AET 1217 xxxx  ∅90 M26-1.5
000010 229472   none IDM 6411 xxxx  ∅90 M19-1.0
000001 221311   none IDM 6436 xxxx  ∅80 M19-1.0 copy of CEV 6436
ab cd ef  #/link   price  ’92-97 A35 Flywheel Nuts and Keys
101000 215487 $1.80 M10-1.0 17-hex plain nut  ’92-95
011100 217487 $4.50 M10-1.0 x 9 17hex oil inj. w/prongs ’92-02
000011 221014   none M10-1.0 ∅16 x 15 17hex
000011 000000 $5.00 M10-1.0 x 15 15hex substitute for 221014
000011 222304 $6.00 M10-1.0 x 10.5 ∅16 17hex oil inj. w/prongs
000001 229629   none M10-1.0 oil inject. with prongs use 222304
111111 200048 $4.00 flywheel key (roller) D3 x 4
ab cd ef  #/link   price  ’92-97 A35 Flywheel Washers 
100000 229919 $2.00 10.5 x 18 x 1 toothed
010000 229918 $0.00 10.5 x 17 x 1.2 use 031513
111100 031513 $0.80 10.5 x 21 x 1.6 substitute
001100 031934 $1.50 10.5 x 18 x 1.5
000011 212842   none 10.5 x 16 x 2.0? use 031934
ab cd ef  #/link   price  ’92-97 A35 Spark Coils 
110000 229445   none CDI/coil  use 230627 see #30 above
001100 219509 $65.0 spark coil AET
000010 229468 $75.0 CDI/coil new in package, sold as is
000001 229006   none spark coil IDM
ab cd ef  #/link   price  ’92-97 A35 Spark Coil Mounts 
001100 222237   none spark coil mount AET-Iskra 1215/1217
000001 229007   none spark coil mount IDM 6436
ab cd ef  #/link   price  ’92-97 A35 Spark Plug Wires 
110000 044528 $3.50 470 ’96-97 Targa, Targa LX, ’97-98 TX50
000100 044528 $2.50 200 mm ’92-95 Colibri
000100 044528 $3.00 300 ’92-93 Bullet, Golden Bullet, TTLX
001011 044528 $3.00 350 mm ’93-97 Sprint
ab cd ef  #/link   price  ’92-97 A35 Spark Plugs and Caps
111111 044511 $3.00 spark plug A35 NGK BR6HS = Bosna F75
111111 210175 $2.00 plug cap boot
111111 211977 $6.00 spark plug cap plain no resistor plastic
ab cd ef  #/link   price  ’92-97 A35 Source Coils
020000 226148   none lights coil spacer AET 11.160.053 only
110000 229518   none lights coil #1 for AET 11.160.052 and 053
010000 229528   none ignit. source coil AET 11.160.053
010000 229529   none lights coil #2 for AET 11.160.053 only
ab cd ef  #/link   price  ’92-97 A35 Points, Condensers
001100 223164 $15.0 points M19B Bosch-type with eyelet wire
001100 223166 $15.0 condenser M32 screw post type
000001 221309 $16.0 points M14 CEV “right” for left rotation
000001 221310 $15.0 condenser M17 CEV solder type
001101 044801 $3.00 points screw M4 x 10 small-head slot use 027235
001100 031930 $1.00 points washer 4 mm
000001 031866 $1.00 points wave washer 4 mm
001100 031942 $0.50 lock washer 3 mm for M32 condenser
001100 031071 $0.70 condenser nut M3
ab cd ef  #/link   price  ’92-97 A35 Stator Screws
330033 027246 $1.00 stator plate screw M4 x 12 phillips
003300 027235   none stator plate screw M4 x 14/15 slot
ab cd ef  #/link   price  ’92-97 A35 Spark Coil Screws
220020 027248 $0.60 spark coil screw   M5 x 12 phillips
001100 027250 $0.50 spark coil screw   M5 x 16 slot
001100 027260 $0.60 spark coil screw   M5 x 20 slot

000002 026296   none spark coil screw M5 x 20 phillips?
ab cd ef  #/link   price  ’92-97 A35 Spark Coil Mount Screws
002000 027259   none coil mount screw   M5 x 8 slot use 027063

000202 027063 $0.60 coil mount screw   M5 x 8 phillips
ab cd ef  #/link   price  ’92-97 A35 Source Coil Screws
 
204000
027056   none source coil screw M4 x 20 philips
240400 027059   none source coil screw M4 x 30 slot

000044 027058 $0.50 source coil screw M4 x 23/25 slot

ab cd ef  #/link   price  ’92-97 A35 Nuts and Washers

002202 031074 $0.40 spark coil nut M5

003000 031507 $0.20 plain washer 4 mm

220022
031508 $0.20 plain washer 5 mm
775777
031866 $0.80 wave washer 4 mm
003000 031999 $0.30 lock washer 4 mm

Flywheel nuts before Jan 2003, for oil injection, had two prongs that turn a edge-slotted aluminum disk. The disk also has a center slot that turns a tongue on the oil injector pump. This “floating” disk allowed for a small amount of misalignment between the crankshaft and oil pump shaft centerlines. After several thousand miles the soft aluminum center slot wears out and becomes hour-glass-shaped. It should be monitored and replaced before it becomes completely rounded out. When that happens it’s “game over”, as the lack of engine oil causes seizure and damage. 

Flywheel nuts after Jan 2003, for oil injection, had the floating disk rubber-mounted to the nut. These were all well-made until about 2009, when some, but not many, were made off-center. Those would prematurely round out the center slot, causing the oil pump to not turn and then the engine to seize.

Left, AET flywheel with 222304 nut, no washer.
Right, IDM flywheel with same nut, no washer
This shows IDM center hole is 1.8 mm deeper.
Also a thick washer is needed for socket wrench.

IDM flywheel nuts: Most moped flywheels have a threaded center hole for a flywheel puller tool. IDM flywheels have smaller center holes with M19-1.0 threads instead of M26-1.5. The nut and washer have to be smaller. But there is no room for a socket inside the threaded hole. So the flywheel nut has to be at least 14 mm tall. Then it sticks out at least 5 mm past the edge of the flywheel, enough for a socket or wrench. The crankshaft ends at the edge of the flywheel. So simply adding washers or a spacer behind the nut is not possible.

IDM flywheel nuts: Besides the flywheel center hole width, the depth is also different. CEV/IDM flywheel center holes are 1.8 mm deeper than AET/Iskra/Bosch/Ducati flywheel center holes. This only matters for oil injected models, where the nut turns the oil pump. Because of that the IDM flywheel nut needs to be 1.8 mm taller than the AET/Iskra one.  In fact it is almost that, 10.5 minus 9.0 is 1.5 mm.

Iskra logo

AET logo

Iskra and AET are the same: In the mid-1990’s the Slovenian-made Bosch-compatible magneto-generators on Tomos mopeds changed names, from Iskra to AET. AET is one of the Hidria group of companies, along with Tomos. Both names are sometimes used interchangeably. On some magnetos, the stator plate says Iskra, but the flywheel says AET.

Corrections: 

In the diagram b, from the 96-97 Targa catalog, the lower ignition source coil part number is incorrect. It says 229518, but it should be 229528. This version here has been corrected.

In the IDM 6411 diagram e, from the 96-97 Sprint catalog, the stator plate part number is incorrect. It says 221471, but it should be 229471. This version here has been corrected.

Also in diagram e, the flywheel washer part number is incorrect. It says 229919, but it should say 212842. 229919 is too wide to fit there. This version has been corrected.

Also in diagram e, the flywheel nut for IDM 6411 with oil injection has an invalid or unknown part number. It says 229629, but that number is not in the Tomos USA 2012 list. It should say 222304, like IDM 6436 has. This version has been corrected.

In the IDM 6436 diagram f, from the 93-95 Sprint catalog, the flywheel washer part number is incorrect. It says 031934, but it should say 212842. 031934 is too wide to fit there. It’s 18 mm OD but the M19-1.0 internal thread tops are 17.5 mm ID. This version has been corrected.

In the diagram c from the 93-95 Sprint catalog (diagram Eb for oil inject) the flywheel nut part number is wrong. It says 222304, but that would be 1.8 mm too tall for a Iskra/AET flywheel. The correct nut is 217487. This version has been corrected.