Tomos A3 Engine Parts

17 Versions of A3 Engines on US models

p is pedal (20 25 30 mph), k is kick (30 mph)
m is pre-mix gas, o is oil injection
b is black, s is silver

p m b part#  speed
k o s  part#   mph 0 years     bike models    magneto-generator
p o b 000000 30,00 89-91 Golden Bullet, TTLX Iskra 1215 12V 50W
k o b 000000 30,00 89-91 Golden Bullet, TTLX Iskra 1215 12V 50W
p o b 000000 30,00 89-91 Bullet TT ooooo  Iskra 1221 12V 28/10W
k o b 000000 30,00 89-91 Bullet TT  ooooo Iskra 1221 12V 28/10W
p m b 000000 30,00 89-91 Bullet ooooooo   Iskra 1221 12V 28/10W
k m b 000000 30,00 89-91 Bullet ooooooo   Iskra 1221 12V 28/10W
p o b 222780 30,00 87-88 Bullet TT  ooooo CEV 6418 12V 28W
k o b 000000 30,00 87-88 Bullet TT ooooo  CEV 6418 12V 28W
p o b 222381 30,00 86-88 Golden Bullet, TTLX CEV 6436 12V 75W
k o b 000000 30,00 86-88 Golden Bullet, TTLX CEV 6436 12V 75W
p m b 222371 30,00 86-88 Bullet SP  oooo  CEV 6951  6V 28/10W
p o b 000000 30,00 85-86 Golden Bullet  o CEV 6951  6V 28/10W
p m b 217210 30,00 81-83 Silver Bullet SP  Duc/Zem  6V 40W
p m b 213392 30,00 81-85 Bullet SP  oooo  Duc/Zem  6V 40W
p m b 211982 25,00 81-85 Bullet GMoooo  Duc/Zem  6V 40W
p o b 217362 20,25 78-85 Sil Bullet SL,GM Duc/Zem  6V 40W
p o b 217363 30,00 78-85 Silver Bullet SP  Duc/Zem  6V 40W
p m s 213392 30,00 78-80 Bullet SP ooooo  Ducati xx 6V 40W
p m s 211982 20,25 78-80 Bullet SL,GM o   Ducati xx 6V 40W
p m s 213392 30,00 76-78 A3SP oooooooo  Ducati xx 6V 40W
p m s 211982 20,25 76-78 A3SL, A3GM oo  Ducati xx 6V 40W
p m s 211982 25,00 75-76 Automatic oooo  Ducati xx 6V 40W

The 1973 A3 was the third Tomos-designed engine, but was the first widely produced. Before the A1 and A3, Tomos made Puch-designed engines and bikes from 1956 to 1981. That’s why some early A3 parts are the same as 60’s Puch, such as the L17 3-piece bearings. In 1986 (and 1985 Golden Bullet) the crank bearings changed from L17 17x40x10 to 6302 17x40x12. The engine cases got 2 mm wider on each side. Servicing was easier and bearings lasted longer. Also in 1986 the carburetor changed from Encarwi to Dellorto. Servicing became more difficult.

 


1978 logo

Tomos A3 Engine Parts

Here 9 Tomos USA parts manuals are combined into one. Three illustration versions abc show the changes and improvements made over time, from 1975 to 1991, with a being the newest. Newer part versions have higher part numbers, and are listed first.

9 parts catalogs for 1974-1991 models with A3 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. 

 


a. ’88-91  b. ’84-87  c. ’75-83

abc # qty  Tomos# price    colors: new, new, used
obc01 1 
209115 none  case set silver ’74-84 for L17, premix
abc01 1 217211 none  case set black ’78-85 for L17
oab01 1 219627 none  case set black ’85-91 for 6302
obc02 1 209026 $35.0 magneto cover silver ’74-86 premix
oab02 1 217205 none  magneto cover black ’86-91 premix
abc02 1 217305 $35.0 magneto cover black ’78-91 oil inject
obc03 1 203023 70-30 clutch cover silver ’74-86 premix
abc03 1 217206 $35.0 clutch cover black ’78-91
abc04 4 205386 $2.80 cylinder stud M7 x 113
abc05 1 209083 $7.00 case gasket
abc06 1 209084 $7.00 clutch cover gasket
abc07 4 037290 $2.50 case centering pin ∅6 x 16
abc08 1 027226 $2.00 oil check plug M6 x 8
abc09 1 044581 $1.50 seal washer ∅6 x 12
abc10 1 027239 $2.00 oil drain plug M8-1.25 x 10
abc11 1 044582 $1.50 seal washer ∅8 x 14
abc12 17 027082 $0.70screw M6 x 25 slot-cheese
abc13 1 027041 $0.80 screw M6 x 65 slot-cheese
abc14 3 026041 $1.50 mount bolt M8-1.00 x 70
abc15 2 208201 $2.00 exhaust stud M6 x 24
obc15 2 044284 $1.00 intake bolt M6 x 22 for ’74-85
oab15 1 025195 $0.60 R intake bolt M6 x 30 for ’86-91
oab15 1 026289 $0.50 L intake bolt M6 x 18 for ’86-91
abc16 2 031933 $0.20 washer 8
obc16 2 031847 $0.25 lock washer 8
abc17 1 209114 $140  cylinder good-used w/new piston
obc18 1 209014 $37.0 cylinder head silver good-used
abc18 1 217123 $42.0 cylinder head black good-used
abc19 1 202395 $3.00 cylinder base gasket
abc20 1 044511 $3.00 spark plug NGK BR6HS
abc21 4 044154 $0.20 head washer 7 plain
abc22 4 031076 $0.60 head nut M7 plain
abc23 1 207403 $50.0 piston assy std 10-18-19 38.0 (30mph)
obc23 1 207407 none  piston assy std 10-18-21 38.0 (25, 20)
abc23 1 202420 none  piston assy o.s 10-18-19 38.5
abc24 2 044754 $$9.0 piston ring std ∅38.0 x 2.0 GN
abc24 2 044751 $10.0 piston ring o.s ∅38.5 x 2.0 GN
abc25 1 201627 $10.0 piston pin ∅9.98 x 32
abc26 2 032038 $1.00 piston clip 10
obc27 3 031124 $0.80 mount nut M8-1.00 plain
ooa27 3 030049 $2.00 mount nut M8-1.00 self-locking
abc28 1 201104 $6.00 wires insert piece (grommet)

 


2 a. ’88-91  b. ’84-87                                                             2 c. ’75-83

abc # qty Tomos# price    colors: new, new, used
abc01 1 
209088 90-50 crankshaft
abc02 1 211641 $3.50 bushing 9.85 x 14.04 x 13 requires reaming
ooc03 0 212957 $7.00 shim washer as needed 17 x 24 x 0.1
ooc03 0 212958 $7.00 shim washer as needed 17 x 24 x 0.15
abc03 0 212959 $7.00 shim washer as needed 17 x 24 x 0.2
obc04 2 044370 $32.0 crank bearing ’74-85 3-pc L17   17x40x10
oab04 2 035074 $8.00 crank bearing ’85-91 1-pc 6203 17x40x12
abc05 2 036554 $9.00 crank seal 17 x 35 x 8
abc06 1 209005 $7.00 inner clutch washer 12.8 x 20.2 x 2.0
abc06 1 209005 $3.00 substitute 13.2 x 19.5 x 2.0
abc07 1 209030 $12.0 clutch drum bushing 12.73 x 15.04 x 22.0
abc08 1 212959 60-40 clutch drum with #1 driving gear
abc09 1 035504 $15.0 roller clutch RC081208 ½ x ¾ x ½ inch
ooc10 0 209073 $5.00 shim washer as needed 19 x 25.8 x 0.10
ooc10 0 209119 $5.00 shim washer as needed 19 x 25.8 x 0.20
oab10 0 209073 $5.00 shim washer as needed 19 x 26.0 x 0.30
oab10 0 209119 $5.00 shim washer as needed 19 x 26.0 x 0.50
abc11 6 209040 $14-9 clutch shoe
abc12 6 209004 $4.50 pivot pin
abc13 1 209001 $16.0 #1 clutch hub
abc14 6 209039 $4.00 brake strip
abc15 2 209013 $6.00 clutch spring green (stiffer, thicker wire)
abc16 1 209035 50-35 #1 clutch assy
abc16 1 209043 50-35#2 clutch assy with #2 driving gear
abc17 1 209074 $7.00 tab washer good-used
abc18 1 200157 $2.50 clutch nut M12-1.0 x 6.5 hex19
abc19 1 044230 $6.00 front cover bearing 6000 10 x 26 x 8
abc20 1 209044 $17-11 #2 clutch hub with #2 driving gear
abc21 1 032082 $2.50 retaining ring (circlip) external 26 x 1.2
abc22 1 209002 $7.00 #1 spring plate
abc23 1 204898 $32.0 connecting rod assy
abc24 1 200048 $4.50 flywheel key (roller) ∅3 x 4

Shim washer 3: In the 1970’s, 212957, 212958 and 212959 crankshaft shims were mainly for adjusting the play (looseness) in the L17 (3-piece  angular contact) crank bearings, but also for centering the crank in the cases. In the 1980’s Tomos decided the thinner shims 212957 and 212958 were not needed, and discontinued them in the 1984 parts catalog. Two years later in 1985-86 the bearings changed to 6203 (1-piece full contact) type, that do not require side-to-side adjustment of play. The 212959 shim was only for centering the crank in the cases. 

Shim washer 10: In the 1970’s, 209073 and 209119 first speed clutch shims were thinner and had smaller increments. A stack of of maybe 3 or 5 was required. In the 1980’s they had the same part numbers, but were made thicker, so less were required, maybe 1 or 2.

 


3  a. ’88-91  b. ’84-87  c. ’75-83

abc # qty  Tomos# price    colors: new, new, used
abc01 1 209054 35-22 countershaft
abc02 1 044835 $2.00 countershaft key 5 x 5 x 12
abc03 1 035072 $7.00 case bearing 6201 12 x 32 x 10
abc04 1 032077 $2.00 retaining ring external 20 x 1.0
abc06 1 209055 $70.0 #1 driven gear
abc07 8 209063 $2.50 roller ∅5 x 8
abc08 1 209064 $5.50 countershaft “J” spring
abc09 1 209059 $1.50 spring anchor
abc10 1 034126 $1.50 spring anchor rivet 3 x 10
abc11 1 209062 $5.00 tab washer 14 x 26
abc12 1 200141 $5.00 countershaft nut M14-1.0 x 7 hex19

abc13 0 209075 $5.00 Shim as needed 10.1 x 14 x 0.2
abc13 0 209076 $5.00 Shim as needed 10.1 x 14 x 0.5
abc14 1 044230 $6.00 rear cover bearing 6000 10 x 26 x 8
abc15 1 209060 50-30 #2 driven gear
abc16 1 209066 $125  drive shaft with needle bearings
abc17 1 044231 $13.0 drive bearing 6006
abc18 1 209078 $18.0 sprocket 26T flat center for metal seal, used
abc18 0 000000 $15.0 sprocket 26T wavy center, loose fit K Star
abc18 0 000000 $12.0 sprocket 25T wavy center, loose fit generic
abc18 0 000000 $12.0 sprocket 27T wavy center, loose fit black

abc19 1 209079 $3.00 tab washer
abc20 1 209080 $5.00 nut M22-1.0 x 8 hex30
abc21 1 209077 $5.00
spacer ’74-07 uncut for metal seal
abc21 0 209077 $7.00
spacer ’08-on cut for o-ring seal
abc21 0 033007 $1.50 o-ring 30 x 1.5 (33 od)
abc22 1 036620 $9.00 drive seal 35 x 47 x 7

Original sprockets have a flat center. Transmission oil is sealed mostly by metal-to-metal. The inner side of the washer #19 seals against the outer side of the sprocket #18. The inner side of sprocket #18 seals against the spacer #17, which seals against the bearing #17, as long as the nut #20 is tight and the sprocket center is not wavy on either side. There is also a seal in the left needle bearing 035502. But it does not hold the oil by itself. 

Aftermarket sprockets have a wavy center. That causes oil to leak. The remedy is to change the spacer 209077 to the o-ring type and add the o-ring 033007. That is what Tomos did after 2007, when their original sprockets were no longer made with flat centers. See more about this is at A55 Trans Oil Leak. Another remedy, maybe less effective but easier, is to clean off the oil and use liquid gasket sealer on both sides of the sprocket center. Many aftermarket sprockets also fit loosely, so they’re not centered. That makes the chain pulsate, where it gets slightly tigher and looser every revolution. When the sprocket is centered the chain runs smooth.

 


4  a. ’88-91  b. 19’84-87  c. ’75-83                                       5  a. ’88-91  b. ’84-87

bc  #   qty 
abc  # kp  Tomos# price   k = kick  p = pedal
abc
01 01 219443 $20.0 Starter shaft pedal L=225 premix models
abc01 01 219669 none  Starter shaft pedal L=256 oil inject models
xab01 10 209564 none  Starter shaft kick
abc02 11 035502 $17.0 L needle bearing SCE 109P <L end has a seal
abc03 11 035503 $15.0 R needle bearing SCE 108   <has no seals
abc04 11 205702 $3.00 Thrust washer 16 x 23 x 2.0
abc05 11 200166 none  Bearing bush 16 x 20 x 20
abc06 01 200266 $7.00 Seal ring pedal 16 x 24 x 7
xab06 10 209577 none  Seal cap kick 16 x 24
abc07 01 209224 $1.50 Outer washer 16 x 26 x 1 dished
abc08 01 209099 $3.50 Spring   goes outside before cup
abc09 01 209096 $3.00 Cup zinc plated goes outside after spring
xab09 01 222809 none  Cup dark plated goes outside after spring
abc10 00 209087 $5.00 Shim as needed 16 x 26 x 0.20
abc10 00 200175 $5.00 Shim as needed 16 x 26 x 0.50
abc10 00 206391 $3.00 Shim as needed 16 x 26 x 1.00
abc10 00 205702 none  Shim as needed 16 x 26 x 2.00
abc11 11 200172 $6.00 Thrust ring
abc12 11 200173 $3.00 Split ring
abc13 11 209052 $7.00 Distance tube 16.2 x 20 x 22
abc14 11 217583 none  Starter assy A3
abc14 11 209065 $10.0 Starter cage A3
abc14 11 209082 16-10 Starter chain A3 3/8 x 5/32″ 32 link
abc14 11 209049 $10.0 Starter sprocket A3
abc15 01 209047 $22.0 Ratchet block pedal
xab15 10 209566 none  Ratchet block kick
xab16 01 209069 $00.0 Cover plate pedal black ’84-91 good-used
xxc16 01 209069 $10.0 Cover plate pedal white ’74-83 good-used
xab16 10 209567 none  Cover plate kick
abc17 11 209048 $9.00 Claw Collar Spring
xxc18 01 200182 none  Ped arm LH chr 517L  ’74-83 9.5  6″  5¼ ½”
xxc18 01 200181 none  Ped arm RH chr 517R  ’74-83 9.5  6″  5¼ ½”
xab18 01 219442 none  Pedal arm LH chrome ’84-91 9.5  6¼ 5¼ ¾”
xab18 01 219441 none  Pedal arm RH chrome ’84-91 9.5 6¼ 5¼ ¾”
xab18 01 222104 none  Pedal arm LH black    ’84-91 9.5 6¼ 5¼ ¾”
xab18 01 222103 none  Pedal arm RH black    ’84-91 9.5 6¼ 5¼ ¾”
abc18 00 000000 $17.0 Pedal arm LH chrome #513L 9.0 6¼ 5¼ ¾”
abc18 00 000000 $17.0 Pedal arm RH chrome#513R 9.0 6¼ 5¼ ¾”
abc18 00 000000 $17.0 Pedal arm LH black    #514L 9.0 6¼ 5¼ ¾”
abc18 00 000000 $17.0 Pedal arm RH black   #514R 9.0 6¼ 5¼ ¾”
abc18 00 000000 $30.0 Pedal arm set chrome#513  9.0 6¼ 5¼ ¾”
abc18 00 000000 $30.0 Pedal arm set black    #514  9.0 6¼ 5¼ ¾”

abc19 12 031076 $0.60 Nut M7 for 206714 and 219440 pedal arm pin
abc20 12 200185 $0.20 Washer 7 for 206714, 219440 and 202726
abc21 02 219440 $2.00 Pedal pin bare ’78-91 use 24
abc21 10 202726 none  Kick pin bare ’84-91
xab22 01 222655 $18.0 Pedal set solid block   ’84-91
xbc22 01 222655 $18.0 Pedal set classic 2-block  ’74-83+
xab23 01 217304
$6.00 Spacer tube on long shaft for oil inj 16 x 19 x 29
xab23 10 200294 none  Kick lever stop cushion
xab24 02 219448 $2.00 Pedal pin assy 9.5 mm for original arms
abc24 00 000000 $2.00 Pedal pin assy 9.0 mm for replica arms

xab24 10 202723 none  Kick pin spacer
xab25 10 208875 none  Kick lever dark
xab26 10 201487 none  Lever cover
xab27 10 027078 $0.50 Screw M6 x 12
xab28 20 031845 $0.25 Lock washer 6
xab29 20 031075 $0.40 Nut M6
xab30 10 027081 $0.50 Screw M6 x 20
xab31 10 260217 none  Retract spring
xab32 10 260216 none  Retract pin
xab33 10 205812 none  Lever mount chrome
xab34 20 209572 none  Spring anchor
xab35 10 209571 none  Return spring 

 


6  a. ’87-91                                                               6  b. ’84-86  c. ’78-83

abc # qty Tomos# price      colors: new, new, used
xab01 1 222319 $42.0 Oil pump Mikuni 000000 00   ’84-91
xxc01 1 217310 $26.0 Oil pump Dellorto S3 217490 ’78-83 good-used
xxa02 1 217308 $12.0 Oil pump drive disk 18 x 6.5  ’87-91 aluminum
xbc02 1 217308 $10.0 Oil pump drive disk 18 x 6.5  ’78-86 plastic
abc03 2 027066 $1.00 Screw M5 x 15(16) phillips wide
abc04 2 031867 $0.80 Wave washer 5 mm
xab05 1 222107 $8.00 Oil pump cover black x ’84-91 used-rusted
xbc05 1 217309 none  Oil pump cover chrome ’78-86
abc06 1 217314 $5.00 Oil hose grommet
abc07 2 044424 $1.00 Screw M5 x 30 sunk-slot good-used
xxa08 1 217311 $12.0 Oil banjo 7-6  ∅7-6 x 8 w/check ball, Dellorto
xxa09 1 217312 none  Banjo bolt 7-6 w/washer  M7/6 x 18 10hex  use 6-6
xxa10 1 217312bnone Seal washer 7 x 11 alum.  only sold with bolt
xxa10 2 044581 $1.50 Seal washer 6 x 12 fiber
xbc08 1 217311 $11.0 Oil banjo 6-6 217491  ∅6 x 8 w/check ball, plain brass
xbc09 1 217312 $8.00 Banjo bolt 6-6 217491 M6 x 16 8hex, fits 7-6 or 6-6
xbc10 3 044581 $1.50 Seal washer 6 x 12 fiber
abc10 0 000000 $4.00 Seal washer 6 x 11 fiber for 7-6 banjo w/6-6 bolt
xxa11 1 044472 $2.00 Oil hose A 200 ∅3.0 ∅5.0 000000 pump to engine
xbc11 1 044472 $2.00 Oil hose A 180 ∅3.0 ∅5.0 217341 pump to engine
abc12 1 044472 $7.00 Oil hose B 700 ∅3.0 ∅5.0 217342 tank to pump
abc12 per 100mm 50¢ Hose 1/8 x 1/4 ∅3.0 ∅6.3 must widen grommet holes
abc13 4 217313 $1.50 Hose clamp ∅5 x ∅7 crimp type for ∅5 hose
xab14 1 222396 $34.0 Oil tank bare ’85-91 new
xab14 1 222396 $20.0 Oil tank bare ’85-91 good-used
xbc14 1 217320 $27.0 Oil tank bare ’78-85
abc15 1 208389 $7.00 Oil tank cap bare
abc16 1 217321 $3.00 Oil cap insert
abc17 1 217322 $9.00 Oil cap strainer
abc18 1 217319 $5.00 Spigot bolt M6
abc19 1 031932 $0.20 Plain washer 6
abc20 1 031075 $0.40 Nut M6
xxa21 1 027071 $1.00 Tank screw xxxxxxx ’85-91 M5 x 35 slot-cheese
xbc21 1 217324 none  Front tank carrier xx’78-85
xxa22 2 031931 $0.80 Wide washer 5 xxxx ’85-91
xbc22 1 217325   none Rear tank carrier xx ’78-85
xxa23 1 222656 $0.00 Spacer tube xxxxxx ’85-91
xbc23 2 031932 $0.20 Plain washer 5 xxxx ’78-85
xxa24 1 031074 $0.40 Nut M5 xxxxxxoxxx ’85-91
xbc24 2 044409 $0.00 Sheet screw xxxxxx ’78-85 4.8 x 9.5
xbc25 2 217339 $0.00 Rubber insert piece ’78-85

 


7a. ’88-91 Iskra 1215 or 1221           7b. ’86-88 CEV 6418 or 6436           7c. ’74-85 Ducati/Zem or ’85-86 CEV 6951

# qty Tomos#  price  7a. ’88-91 Iskra 1215, 1221
61 1 222010 none  magneto ’88-91 Iskra 1215 12V 50w
61 1 227090 none  magneto ’88-91 Iskra 1221 12V 28/10w
62 1 223168 none  stator assy 2-coil 1215
62 1 227087 none  stator assy 2-coil 1221
63 1 223169 none  ignition coil (upper) 1215
63 1 227088 none  ignition coil (upper) 1221
64 1 223170 none  lighting coil (lower) 1215
65 1 223164
$15.0 points M19B
66 1 223166 $15.0 condenser
M32
67 1 224438 $1.50 condenser cover
68 4 221992 $0.80 coil screw M4 x 22 phil
69 5 031866 $0.20 coil lock washer 4
70 1 044801 $1.30 points screw M4 x 10 slot
71 1 031930 $0.50 points washer 4 x 8
72 1 031942 $0.30 condenser lock washer 3
73 1 031071 $0.50
 condenser nut M3
74 3 027205 $0.80 stator screw M4 x 14 slot
75 3 031507
$0.20 stator lock washer 4
76 3 031999 $0.20 stator washer 4
77 1 200048 $4.00 flywheel key (pin)
78 1 031934 $1.00 flywheel washer 10.5 x 18
79 1 215487 $2.00 flywheel nut M10-1.0 hex17
80 1 211975 none  ignition spark coil
81 1 211977 $6.00 spark plug cap
82 1 222237 none  coil mount
83 1 027066 $0.25 lock washer 5
86 3 031074
$0.40 nut M5
87 2 027063 $1.00 screw M5 x 8 slot
88 1 223162
$25.0 base plate bare ∅90 5-hole 4×54 = Bosch
89 1 222304 $6.00 flywheel nut 10×1 hex17 for oil inj
90 1 223176 none  flywheel ∅90 M26-1.5 ’88-91 Iskra 1215
90 1 227086 none  flywheel ∅90 M26-1.5 ’88-91 Iskra 1221

# qty Tomos# price  7b. ’86-88 CEV 6418, 6436
01 1 222502 none  magneto CEV 6418 12V 28w for Bullet
01 1 222303 none  magneto CEV 6436 12V 75w Golden Bullet
01 1 221005
$230  magneto IDM 6436 12V 75w 90’s copy
02 1 222769 none  stator assy 2-coil 6418
02 1 221737 none  stator assy 3-coil 6436
03 1 222765 none  ignition coil (upper) 6418
03 1 221735 none  ignition coil (upper) 6436
04 1 222766 none  lighting coil (lower) 6418
04 1 221736 none  lighting coil (lower) 6436
05 1 221739 none  lights coil 2 (upper) 6436
07 1 221309 $16.0 points M14
08 1 221310 $15.0 condenser M17
09 2 221733 $1.30 points/cond screw M4 x 10 slot
10 2 027058 $0.70 screw M4 x 25 slot
11 3 027204 $0.70 screw M4 x 12 slot
12 8 031866 $0.80 points washer 4 x 9
13 1 222304 $6.00 flywheel nut 10×1 hex17 for oil inj
14 1 221014 none  flywheel nut 10×1 hex17 7×16 round
14 1 221014 $5.00 substitute 10×1 hex15 x 15
15 1 200048 $4.00 flywheel key (pin)
16 1 031934 $1.00 flywheel washer 10.5 x 18
17 1 211975 $55.0 ignition spark coil CEV 6309
18 1 211977 $6.00 spark plug cap
19 3 031074 $0.40 nut M5
20 1 027068 $0.50 screw M5 x 15 or 16
21 4 031844 $0.25 lock washer 5
22 2 027063 $1.00 screw M5 x 8
25 1 222770 none  flywheel ∅80 M19-1.0 6418
25 1 221738 none  flywheel ∅80 M19-1.0 6436 strong magnets
26 1 221313 none  base plate bare ∅90 5-hole 4×48 CEV 13923
27 1 200048 $4.00 flywheel key (pin) 

1986 was the debut of solid-state voltage regulation, where all the lights are powered by one generator wire. This eliminated the need for multiple lighting output wires and source coils. The generator makes enough watts for all the lights to be on at once. But most of the time some of the lights are turned off. Then the extra watts are absorbed by the regulator, and “wasted” by warming up the frame. So the lights always stay the same brightness, no matter how many are on or off. No more external ignition ground means the engine never looses spark because of the lights, like a pre-1987 Tomos sometimes did.

# qty Tomos#  price  7c. ’74-86 Ducati, ZEM, CEV
22 1 211975 $55.0 ignition spark coil CEV 6309
23 1 211977
$6.00 spark plug cap
24 2 027071 $0.80 screw M5 x 35 slot
25 2 031844 $0.25 lock washer 5
26 2 211976 $2.00 spacer tube 6 x 8 x 22

31 1 213222
$200  magneto ’74-85 Ducati 31.17.30 6V 28/10w
31 1 213222 none  magneto ’83-85
ZEM 31.17.300  6V 28/10w
31 1 213222 none  magneto ’85-86
CEV 6951000     6V 28/10w
32 1 213734
35-20 lighting coil (lower) 4×57 = CEV 04360
33 1 213733 $65.0 ignition coil (upper) 4×57 = CEV 04359

34 1 221309 $16.0 points M14
35 1 221310 condenser M17T ∅17.9 Duc/Zem
35 1 221310 $15.0 condenser M17   ∅18.0 CEV-type
36 1 217487
$3.50 flywheel nut M10-1 hex17 w/prongs for oil inj.
37 1 031934 $1.20 flywheel washer 10.5 x 18
38 1 215487 $2.00 flywheel nut M10-1.0 hex17
39 4 027057
$0.70 coil screw M4 x 20 slot
40 5 031930 $0.50 points washer 4 x 8
41 1 031843 $0.20 lock washer 4
42 1 027053 $1.30 pts/cond screw M4 x 10 slot
43 1 213737
$130  flywheel ∅94 M26-1.5 Ducati
43 1 213737 $100  substitute ∅94 M26-1.5 CEV 6943
44 1 213738
$75.0 base plate bare ∅90 5-hole 4×57 CEV 13085
45 1 200048 $4.00 flywheel key (pin) 

 

Left engine case determines what substitute magnetos could fit. 

’74-91 A3, ’92-97 A35 left case had only 3 M4 stator  holes.
Only a 3-bolt 90 mm stator fits.

‘98-06 A35, 04-18 A55 left case had 3 M4 and 2 M5 holes.
Either 3-bolt or 2-bolt 90 mm stator fits.