Seals

This seal inner lip has a circular thin coil spring that holds onto the rotating shaft. Click to enlarge and see the tiny coils of the spring.

Seals are for sealing rotating or sliding shafts where they emerge from a sealed compartment. Fork seals and shifter shaft seals are sliding type. Engine seals are rotating type. Most engine seals are for preventing oil leakage. When four-stroke crank seals leak, the engine still runs the same, but oil drips out. But two-stroke crank seals are also pressure seals, keeping air in (or out). When they leak, gas-oil mist leaks out, and fresh air leaks in. Then the engine won’t idle or accelerate good. That is because two-strokes “breathe” through the crankcase.

Metric seals are specified by their type and size (inner, outer, and thickness, in mm).

Applications and year ranges listed below are for models that sold new in the USA. Many of the year ranges would begin earlier or end later for worldwide models. 

Types: SR = Square Ring, VC = V-lip Coated, SC = Spring-lip Coated, TC = Two-lip Coated, DC = Double-spring Coated
Types: SR = Square Ring, VB = V-lip Bare, X SB = Spring-lip Bare, X TB = Two-lip Bare, X DB = Double-spring Bare x

 

type  ID  OD  depth  price   part number     applications (US models) xxxxx location    nearby bearing     substitute


VC  05 x 30 x 6 0.0 $5.00  E535-00-50   78-83 Indian AMI-50 engine xxxx engage shaft
VC  06 x 15 x 4 0.0   N/A    106019 0000 80-85 Morini M101 engine xxxxxx engage shaft
VC  10 x 16 x 4 0.0   N/A    2810361 000 86-89 Derbi flat reed engine  xxx  engage shaft


VC  12 x 18 x 3 0.0 $8.00  8228630 000 76-86 Derbi “non & pyr reed” xxx  engage shaft
VB  12 x 19 x 5 0.0 $4.00  12x19x5 000 only one
SC  12 x 22 x 7 0.0 $6.00  12x22x7 000 85-88 MX3/MX5 bike motor    xxx  R crank (mag)    6202


VC  13 x 19 x 3 0.0   N/A    S.008766 00 77-86 Vespa (variator models) xxx rear pulley         needle
VC  13 x 19 x 3 0.0   N/A    106021 0000 80-85 Morini M101 engine
TC  13 x 22 x 4 0.0 $7.00  S017002 000 76-86 Vespa variator models    xx rear pulley shaft  needle


SC  14 x 30 x 7 0.0 $12.0  816181 0000 76-80 Laura M48 engine (Batavus) R crank (mag)   6302  use 15x30x7


SR  15 x 20 x 2.5 0 $2.00  15x20x2.5 00 black buna-rubber square ring
SR  15 x 21 x 3 0.0   N/A    816180 0000 76-80 Laura M48 felt ring xxxxxxx clutch                 needle  use 15x21x3SC
SC  15 x 21 x 3 0.0 $6.00  0054195 000 76-79 Solo 255 w/Laura clutch xx  clutch                 needle
TC  15 x 21 x 4 0.0 $6.00  19089 00000 74-80 Motobecane 7,40,50,50V xx L & R crank         6302QR
VB  15 x 23 x 3 0.0 $4.50  15x23x3
SC  15 x 24 x 4 0.0 $5.00  15x24x4
SC  15 x 24 x 5 0.0 $6.00  4790 000000 76-80 Minarelli V1 engine  xxxxxx  pedal shaft
SC  00 x 00 x 0 0.0   N/A    4790 000000 76-80 Minarelli V1 engine xxxxxxx  sprocket shaft     6202
SC  00 x 00 x 0 0.0   N/A    106008 0000 76-80 Morini M1, M101, S5K2 xxxx sprocket shaft     6202
SC  00 x 00 x 0 0.0   N/A    112978 0000 71-on Vespa/Piaggio (all models) x L (only) crank      6202
SB  15 x 24 x 7 0.0 $6.00  106003 0000 76-80 Morini MO1, MO2 engine xx- sprocket shaft     6202
SC  00 x 00 x 0 0.0   N/A    15x24x7 000 77-80 Kreidler 2-speed engine xxx- L crank (mag)     B015
SC  00 x 00 x 0 0.0   N/A    630004000    77-85 Sachs 505 engine xxxxxxxx- pedal shaft
SC  00 x 00 x 0 0.0   N/A    50115 00000 76-83 Jawa 207 engine xxxxxxxxx- clutch
SB  15 x 25 x 5 0.0 $9.00  15x25x5 000  77-80 Kreidler 2-speed engine xxx- R crank (clutch)  B015
SC  15 x 25 x 6 0.0 $7.00  E611-00-50   78-83 Indian AMI-50 engine xxxxx  L crank (mag)    6202
SC  15 x 25.5 x 7 0 $8.00  91201147003 78-83 Honda PA50 Hobbit xxxxx x  L & R crank
SC  15 x 25.5 x 7 0 $8.00  91201147003 77-83 Honda NC50 Express, NA50  L & R crank
SC  15 x 25.5 x 7 0 $8.00  91201147003 82-83 Honda NU50 Urban Express  R crank (mag)
VC  15 x 26 x 6 0.0 $6.00  93109-15001 0000  Yamaha models?
SC  15 x 27 x 7 0.0 $6.00  50116 00000 76-83 Jawa 207 engine?
SB  15 x 30 x 5 0.0 $8.00   E2-47 00000 78-85 Laura M56 engine (Trac)       middle shaft      6202  use 15x30x5.5
SC  15 x 30 x 5.5 0 $6.00  15x30x5.5 0  75-85 Sachs 504, 505 engine xxxx L crank (clutch)  6202
SC  15 x 30 x 6 0.0 none    29868000 00 72-78 Garelli horiz. 1-speed early   R crank (mag)    6302  use 15x30x5.5
SC  15 x 30 x 7 0.0 $7.00  8228400 000 76-82 Derbi non reed engine xxxx  sprocket shaft    6203
SC  00 x 00 x 0 0.0   N/A    15x30x7 000 85-88 MX3/MX5 bike motor xxxxxx L crank (clutch)  6202
SC  00 x 00 x 0 0.0   N/A    15x30x7 000 76-78 Angel/Speed Bird xxxxxxxxx R crank (mag)    6302
SB  15 x 30 x 8 0.0 $6.00  15x30x8
SC  15 x 32 x 5/5.5 $7.00  750015 0000 76-85 Sachs 504, 505 engine xxx  sprocket shaft
SC  15 x 32 x 7.5 0 $6.00  15x32x7
SB  15 x 32 x 7 0.0 $9.00  E2-45 00000 78-85 Laura M56 engine (Trac) xxx L crank (mag)    6202
SC  15 x 35 x 7 0.0 $7.00  15x35x7 000 76-85 Sachs 504, 505 engine xxxx R crank (mag)    6202
SC  00 x 00 x 0 0. 0  N/A    15x35x7 000 77-80 Solo 255 engine (Columbia)  R crank (mag)
SC  15 x 35 x 10 .0   N/A    15x35x10 00 76-80 Benelli G2 engine xxxxxxxx   L crank (mag)    6203  use 15x35x7
SC  15 x 42 x 13 .0   N/A    15x42x13 00 83-86 Derbi “pyramid reed” xxxxxx sprocket shaft    6203


SR  16 x 20 x 2.5 0   N/A    29980900 00 76-86 Garelli H1 horizontal 1-spd   L & R pedal shaft  oooo  use 16x20x2
SR  16 x 20 x 2.0 0 $2.00  16x20x2ring  76-86 Garelli H1 buna-rubber square ring
VC  16 x 21 x 4 0.0   N/A    88481591 00 76-78 Laura M48 engine (Batavus) pulley               needle
VC  16 x 22 x 3 0.0   N/A    124571 0000 71-86 Vespa Ciao non-variator       clutch               needle
SC  16 x 24 x 4 0.0 $5.00  88235300 00 76-89 Derbi (all US models)           L & R pedal shaft
SC  16 x 24 x 4 0.0 $5.00  29867100 00 76-86 Garelli Gulp and VIP 2-spd   L & R pedal shaft
TC  16 x 24 x 4 0.0 $7.00
SC  16 x 24 x 5 0.0 $7.00  106004 0000 76-80 Morini MO1, MO2, M1          pedal shaft
SC  16 x 24 x 6 0.0 $7.00  200266 0000 74-on Tomos A3, A35, A55            R pedal shaft
SC  16 x 30 x 4.5    $3.00  37616 00000 76-83 Peugeot 102, 103 engine     R crank (mag)   6203
TC  16 x 30 x 5 0.0 $5.50  same# 0000  76-83 Peugeot OEM replacement    R crank (mag)   6203
SC  16 x 30 x 7 0.0 $8.00  16x30x7
VC  16.5 x 23 x 3 0 $9.50  19858 00000 76-80 Motobecane 7,40,50,50V      fork


VB  17 x 23 x 3 0.0 $8.00  17x23x3
VC  17 x 25 x 4         N/A   114469 0000 76-86 Vespa Ciao (non variator)     rear pulley shaft
SC  17 x 25.5 x 7 0 $8.00 91201GB7631 77-83 Honda PA50 with performance crank L (clutch)
SB  17 x 28 x 5 0.0 $7.50  17x28x5
TC  17 x 28 x 6 0.0 $8.00  6125230 000 76-86 Derbi “non & pyr reed”         R crank (clutch)  6303
TC  00 x 00 x 0 0.0   N/A    6125230 000 76-86 Derbi “non & pyr reed”         L crank (mag)     6203
SC  17 x 28 x 7 0.0 $6.50  50112 00000 76-85 Jawa 207 engine xxxxxxxxx L & R crank
SC  00 x 00 x 0 0.0   N/A    17x28x7 000 78-79 Tas BE48 (Solo remake)       R crank (mag)
SC  17 x 30 x 5 0.0 $7.50  29867800 00 72-78 Garelli 1-speed “H1” early    L crank (clutch)  6203
SC  17 x 30 x 6/6.5 $10.0  29868100 00 76-86 Garelli 1-speed “H1”           R crank (mag)     6203
SC  17 x 30 x 7 0.0 $8.00  0F02500231  86-89 Derbi “flat reed”                  L crank (mag)     6203
SC  00 x 00 x 0 0.0   N/A    0F02500231  86-89 Derbi “flat reed”                  R crank (clutch)  6303
TC  17 x 32 x 6 0.0  N/A     17x32x6TC    78-85 General 5-Star                    rear wheel          6201
SB  17 x 35 x 7 0.0 $8.00  17x35x7SB
SC  17 x 35 x 7 0.0 $7.50  9023847       78-86 Puch 2-speed ZA50             L crank (mag)     L17
SC  00 x 00 x 0 0.0   N/A    E2-48            78-85 Laura M56 engine (Trac)      sprocket shaft    6203
TC  17 x 35 x 7 0.0 $10.0  17x35x7TC
DC  17 x 35 x 7 0.0 $12.0  9023847.late 78-86 Puch 2-speed ZA50            L crank (mag)     L17
SB  17 x 35 x 8 0.0 $6.50  4710 000000 76-80 Minarelli V1                        L & R crank        6203
SC  17 x 35 x 8 0.0 $9.00  106001 0000 76-84 Morini MO1,M1                   L & R crank        6203
SC  00 x 00 x 0 0.0   N/A    106001 0000 78-80 Morini MO2                        L crank (mag)     6203
SC  00 x 00 x 0 0.0   N/A    036554 0000 76-84 Tomos A3 engine                 L & R crank         L17
SC  00 x 00 x 0 0.0   N/A    036554 0000 85-on Tomos A3,A35,A55             L & R crank         6203
SC  00 x 00 x 0 0.0   N/A    17x35x8 000 76-78 Demm engine (Smily)          L & R crank         6202
SC  17 x 40 x 6 0.0 $8.00  17x40x6
SC  17 x 40 x 7 0.0 $7.00  9013851 000 74-83 Puch 1-speed E50              L crank & drive    6203
TC  17 x 40 x 7 0.0 $9.00  17x40x7TC
DC  17 x 40 x 7 0.0 $12.0  9023851 000 84-86 Puch 1-speed E50              L&R crank & drive 6203
SC  17 x 40 x 7/7.5    N/A   29868300 0   77-86 Garelli VIP  2-s  “V2”           L & R crank        6203   use 17x40x7

SC  17 x 40 x 8.5 0 $9.50  29858500 0   74-78 Garelli Gulp 2-s “G2”           L & R crank        6203   use 17x40x7


VC  18 x 24 x 4       $12.0  S.008771 00 74-86 Vespa variator models         rear pulley  xxx needle


VC  19 x 24 x 3.8 0   N/A    106020 0000 80-85 Morini M101                       variator drum


VB  20 x 26 x 4 0.0 $15.0  E2-42 00000 78-85 Laura M56 engine (Trac)      R driveshaft        bush
SC 00 x 00 x 0 0.0    N/A    20x26x4 000 77-79 Puch “snowflake mag”          rear wheel
TC  20 x 30 x 4.5/5 $7.00  37004 00000 76-80 Peugeot 102/103                L crank (clutch)  6204
TC  20 x 30 x 5 0.0 $6.50  131511 0000 74-86 Vespa/Piaggio (all)              rear brake drum
TC  20 x 30 x 6 0.0 $8.00  T114-00-50 0 78-83 Indian AMI-50 4-stroke        pedal shaft
SC  20 x 30 x 7 0.0 $7.50  3129130 000 84-86 Derbi RD50                        sprocket shaft
SC 00 x 00 x 0 0.0    N/A    50101 00000 76-85 Jawa 207 engine xxxxxxxx   sprocket shaft
SC 00 x 00 x 0 0.0    N/A    20x30x7 000 78-79 Tas BE48 (Solo remake)       L crank (clutch)
SC  20 x 31 x 7 0.0   N/A    91202155004 82-83 Honda NU50 Urban Express  L crank (clutch)
VC  20 x 32 x 4 0.0 N/A    0001200341  76-89 Derbi (all models)                F&R wheels        6201
TC  20 x 32 x 7 0.0 $8.00  20x32x7TC
SC  20 x 35 x 7 0.0 $7.00  9003849 000 78-86 Puch 2-speed ZA50             R crank (clutch)  E20
DC  20 x 35 x 7 0.0 $9.00  9003849.late 78-86 Puch 2-speed ZA50             R crank (clutch)  E20
SC  20 x 35 x 8 0.0   N/A    20x35x8 000 76-80 Benelli G2 engine                R crank (clutch)
SC 00 x 00 x 0 0.0    N/A    106012 0000 78-80 Morini MO2 engine               R crank (clutch)  6204
SC  20x42x7 offset  none    816480 0000 76-78 Laura M48 engine (Batavus) L crank (clutch)  6302
SB  20 x 42 x 7 0.0 $8.00  29860300 00 76-86 Garelli vert 2-spd “G2 &V2”  R driveshaft       6004
TC  20 x 42 x 7 0.0 $9.00  20x42x7TC
TC  20 x 42 x 8 0.0 $9.00  20x42x8TC


SB  21 x 32 x 7 0.0 $8.00  E2-46 00000 78-85 Laura M56 engine (Trac) 00  R crank (clutch)  6202


SC  22 x 31 x 4 0.0   N/A    22x31x4 000 66-86 Solex (not sold separately)  L crank xxxxxxx  6203
SC  22 x 32 x 5.5 0 $8.00  22x32x5.5
TC  22 x 39 x 6 0.0 $9.00  22x39x6
SC  22 x 40 x 7 0.0 $9.00  9023835 000 74-83 Puch 1-speed E50 xxxxxxxx R crank (clutch)  6203 w/clip
DC  22 x 40 x 7 0.0 $12.0  9023852 000 84-86 Puch 1-speed E50 xxxxxxxx L & R crank
SC  22 x 42 x 7 0.0   N/A    22x42x7 000 76-78 Angel/Speed Bird xxxxxxxx  L crank (clutch)  6302


VC  24 x 32 x 7 0.0  N/A    0003102470   76-89 Derbi (all models) xxxxxxx   fork
VC  24 x 33 x 10.5   N/A    F157-00-50 0 78-83 Indian AMI-50 xxxx xxxxx    fork
SC  24 x 35 x 6 0.0  N/A    158962 0000  ??-??  Vespa P200  xxxx xxxxxxxx  L crank (mag)


SC  25 x 35 x 7 0.0 $5.00  9023816 000 78-86 Puch 2-speed ZA50  xxxxxx sprocket shaft    6203
TC  25 x 40 x 7 0.0 $9.00  0008330461  76-86 Derbi “non & pyr reed” xxxx sprocket shaft    6205


SC  26 x 35 x 7 0.0 $14.0  0054203 000 77-80 Solo 255 engine (Columbia) L crank (clutch)
TC  26 x 36 x 10.5  $9.00  26x36x10.5


SC  28 x 38 x 7 0.0 $7.50  28x38x7 000  76-85 Jawa 207 engine xxxxxxxx  L cover (inner clutch)
SC  28 x 40 x 7 0.0 $8.00  3211308291   78-81 Puch Magnum MkII  xxxxx  fork
SC 00 x 00 x 0 0. 0   N/A    116205 0000  78-85 Vespa/Piaggio Grande xxxx fork


SC  30 x 40 x 7 0.0 $11.0  000000 0000  07-18 Tomos A55 xxxxx  xxxxxxx fork seal
SB  30 x 40 x 7 0.0 $7.00  30x40x7 000  only one


SC  35 x 47 x 7 0.0 $9.00  036620 0000 74-18 Tomos A3, A35, A55 xxxxx  sprocket shaft    6006
T 35 x 50 x 7 0.0 $10.0  00000000000 86-89 Derbi Variant Sport xxxxxx sprocket shaft


 

 

 

                        S E A L    S E T S 1 sprocket   transmission  L pedal 1 R pedal    default type is SC single-lip coated
 MM part # xx  L crank 11 R crank 1 sprocket   transmission  L pedal 1 R pedal    price      application


BenelliG2orig  15-35-10 x 20-35-8 x ??-??-?? x  01-01-1 xx ??-??-?? x ??-??-??   N/A  ’75-80 Benelli G2
BenelliG2xx  15-35-7 xx 20-35-7 x ??-??-?? x  01-01-1 xx ??-??-?? x ??-??-??   $??  same

GarelliH1orig  17-30-5 xx 15-30-6 x 17-30-5 xx 01-01-1 xx 16-20-2.5 16-20-2.5 N/A  ’72-78 Garelli early 1-s “H1”
GarelliH1a xx 17-30-7 xx 15-30-5.5  17-30-7 xx 01-01-0 xx 16-20-2 x 16-20-2   $29  same

GarelliH1orig  17-30-6 xx 17-30-6 x 17-30-5 xx 01-01-1 xx 16-20-2.5 16-20-2.5 N/A  ’76-92 Garelli horiz. 1-s “H1”
GarelliH1 xxx 17-30-7 xx 17-30-7 x 17-30-7 xx 01-01-0 xx 16-20-2 x 16-20-2   $29  same

GarelliG2orig  17-40-8.5  17-40-8.5  20-42-7 xx 01-01-1 xx 16-24-4 x 16-24-4    N/A  ’75-78 Garelli Gulp Matic
GarV2M1orig  17-40-7.5  17-40-7.5  20-42-7 xx 01-01-1 xx 16-24-4 x 16-24-4    N/A  ’78-86 Garelli VIP, Monza GT
GarG2V2M1   17-40-7TC 17-40-7TC 20-42-7 xx 01-01-1 xx 16-24-4 x 16-24-4   $29  ’75-86 Garelli Gulp,VIP,Monza

Jawa207.orig 17-28-7 xx 17-28-7 x 20-30-7 xx 28-38-7 xx 01-01-1 x 01-01-1   $23  ’74-83 Jawa 207

7107136 orig 17-35-8SB 17-35-8SB 15-24-5 xx 01-01-1 xx 15-24-5 x 15-24-5   $25  ’74-80 Minarelli V1
MinarelliV1x 17-35-7 xx 17-35-7 x 15-24-5 xx 01-01-1 xx 15-24-5 x 15-24-5   $25  same

Motobecane   15-21-4TC  15-21-4TC 01-01-1 xx 01-01-1 xx 01-01-1 x 01-01-1  $11  ’74-80 Motobecane 40, 50, 7

26-0505 orig 17-35-8 xx 17-35-8 x 15-24-7 xx 01-01-1 xx 16-24-5 x 16-24-5   $25  ’74-86 Morini MO, MO1, M1
26-0506 orig 17-35-8 xx 17-35-8 x 15-24-5 xx 01-01-1 xx 01-01-1 x 01-01-1   $18  ’72-84 Morini S5K,S5K2,S5R
26-0508 orig 17-35-8 xx 20-35-8 x 15-24-7 xx 01-01-1 xx 16-24-5 x 16-24-5   $25  ’77-80 Morini MO2
26-0514 orig 17-35-8 xx 17-35-8  15-24,19-24,13-19,6-15 16-24-5 x 16-24-5   N/A  ’79-84 Morini M101 variator

Peugeot.orig  20-30-4.5  16-30-4.5  01-01-1 xx 01-01-1 xx 01-01-1 x 01-01-1   $10  ’75-83 Peugeot 102 and 103
Peugeot xxx  20-30-5TC 16-30-5TC 01-01-1 xx 01-01-1 xx 01-01-1 x 01-01-1   $12  same

PuchE50.orig 17-40-7 xx 22-40-7 x 17-40-7 xx 01-01-1 xx 01-01-1 x 01-01-1   $22  ’74-86 Puch 1-speed E50
PuchE50 xxx 17-40-7TC 17-40-7TC 17-40-7TC   01-01-1 xx 01-01-1 x 01-01-1   $28  same
PuchE50.84   17-40-7DC 17-40-7DC 17-40-7DC  01-01-1 xx 01-01-1 x 01-01-1   N/A   same

PuchZA.orig   17-35-7 xx 20-35-7 x 25-35-7 xx 01-01-1 xx 01-01-1 x 01-01-1    $25  ’78-86 Puch 2-speed ZA50
PuchZA50.84 17-35-7DC 20-35-7DC 25-35-7   x 01-01-1 xx 01-01-1 x 01-01-1   $36  same

Sachs504orig 15-30-5.5  15-35-7 x 15-32-5.5   01-01-10 xx 01-01-1 x 01-01-1 $18  ’74-80 Sachs 504
Sachs505orig 15-30-5.5  15-35-7 x 15-32-5.5   01-01-1 xx 15-24-7 x 15-24-7   $24  ’76-90 Sachs 505