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Yamaha Parts

Motorcycle Pistons

Make	Part No.	Description
Yamaha	Part no. 18320 STD	Yamaha - 248cc (YDS5) 2 port & booster ports, 2 stroke, Year: 1967-70
Yamaha	Part no. 18320 +.5 MM	Yamaha - 248cc (YDS5) 2 port & booster ports, 2 stroke, Year: 1967-70
Yamaha	Part no. 19930 STD	Yamaha - 195cc (RD200) Reed Valve Engine, Year: 1971-76 compression ratio 7.1:1 (RD200DX) 2 stroke, Year: 1976 on
Yamaha	Part no. 19930 +.5 MM	Yamaha - 195cc (RD200) Reed Valve Engine, Year: 1971-76 compression ratio 7.1:1 (RD200DX) 2 stroke, Year: 1976 on
Yamaha	Part no. 19930 +.75 MM	Yamaha - 195cc (RD200) Reed Valve Engine, Year: 1971-76 compression ratio 7.1:1 (RD200DX) 2 stroke, Year: 1976 on
Yamaha	Part no. 19930 +1 MM	Yamaha - 195cc (RD200) Reed Valve Engine, Year: 1971-76 compression ratio 7.1:1 (RD200DX) 2 stroke, Year: 1976 on
Yamaha	Part no. 16477 +1 MM	Yamaha - 125cc (YA5) 2 stroke
Yamaha	Part no. FWT 016 STD	Yamaha - 125cc (DTR, TZR) 250cc (TZR)
Yamaha	Part no. FWT 016 +.25 MM	Yamaha - 125cc (DTR, TZR) 250cc (TZR)
Yamaha	Part no. FWT 016 +.5 MM	Yamaha - 125cc (DTR, TZR) 250cc (TZR)
Yamaha	Part no. FWT 016 +1.5 MM	Yamaha - 125cc (DTR, TZR) 250cc (TZR)
Yamaha	Part no. FWT 016 +1.75 MM	Yamaha - 125cc (DTR, TZR) 250cc (TZR)
Yamaha	Part no. 21150 STD	Yamaha - 653cc (XJ650) Year: 1980 on
Yamaha	Part no. 21341 +.5 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 21341 +.75 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 21341 +1 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 21341 +1.25 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 21341 +1.5 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 21341 +2 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 21341 +2.25 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 21341 +2.5 MM	Yamaha - 347cc (YPVS)
Yamaha	Part no. 16431 STD	Yamaha - 246cc (YDS2, YDS3) 2 port, 2 stroke, compression ratio 7.5:1
Yamaha	Part no. 16431 +.5 MM	Yamaha - 246cc (YDS2, YDS3) 2 port, 2 stroke, compression ratio 7.5:1
Yamaha	Part no. 16431 +1 MM	Yamaha - 246cc (YDS2, YDS3) 2 port, 2 stroke, compression ratio 7.5:1
Yamaha	Part no. 16775 STD	Yamaha - 50cc (MF2) Year: 1965-66 (U5 Pal) 2 stroke, compression ratio 7.4:1 Year: 1965-66
Yamaha	Part no. 16775 +.5 MM	Yamaha - 50cc (MF2) Year: 1965-66 (U5 Pal) 2 stroke, compression ratio 7.4:1 Year: 1965-66
Yamaha	Part no. 16775 +1 MM	Yamaha - 50cc (MF2) Year: 1965-66 (U5 Pal) 2 stroke, compression ratio 7.4:1 Year: 1965-66
Yamaha	Part no. 16775 +1.5 MM	Yamaha - 50cc (MF2) Year: 1965-66 (U5 Pal) 2 stroke, compression ratio 7.4:1 Year: 1965-66
Yamaha	Part no. 17756 STD	Yamaha - 58cc (YJ1, YJ2) 2 stroke, compression ratio 6.8:1, Year: 1966
Yamaha	Part no. 17756 +.5 MM	Yamaha - 58cc (YJ1, YJ2) 2 stroke, compression ratio 6.8:1, Year: 1966
Yamaha	Part no. 17756 +.75 MM	Yamaha - 58cc (YJ1, YJ2) 2 stroke, compression ratio 6.8:1, Year: 1966
Yamaha	Part no. 17756 +1 MM	Yamaha - 58cc (YJ1, YJ2) 2 stroke, compression ratio 6.8:1, Year: 1966
Yamaha	Part no. 20377 STD	Yamaha - 247cc (RD250) Reed Valve Engine, compression ratio 7:1, Year: 1971 on. (RD250S, Type 1A2) Year: 1976. (Type 1A2, 1N9) 2 stroke, Year: 1977
Yamaha	Part no. 20377 +.25 MM	Yamaha - 247cc (RD250) Reed Valve Engine, compression ratio 7:1, Year: 1971 on. (RD250S, Type 1A2) Year: 1976. (Type 1A2, 1N9) 2 stroke, Year: 1977
Yamaha	Part no. 20377 +.5 MM	Yamaha - 247cc (RD250) Reed Valve Engine, compression ratio 7:1, Year: 1971 on. (RD250S, Type 1A2) Year: 1976. (Type 1A2, 1N9) 2 stroke, Year: 1977
Yamaha	Part no. 20377 +1 MM	Yamaha - 247cc (RD250) Reed Valve Engine, compression ratio 7:1, Year: 1971 on. (RD250S, Type 1A2) Year: 1976. (Type 1A2, 1N9) 2 stroke, Year: 1977
Yamaha	Part no. 20377 +1.5 MM	Yamaha - 247cc (RD250) Reed Valve Engine, compression ratio 7:1, Year: 1971 on. (RD250S, Type 1A2) Year: 1976. (Type 1A2, 1N9) 2 stroke, Year: 1977
Yamaha	Part no. 20557 STD	Yamaha - 123cc (DT125 trail, DT125E, DT125F) 2 stroke, compression ratio 6.7:1, Year: 1973 on
Yamaha	Part no. 20557 +.25 MM	Yamaha - 123cc (DT125 trail, DT125E, DT125F) 2 stroke, compression ratio 6.7:1, Year: 1973 on
Yamaha	Part no. 20557 +.75 MM	Yamaha - 123cc (DT125 trail, DT125E, DT125F) 2 stroke, compression ratio 6.7:1, Year: 1973 on
Yamaha	Part no. 20557 +1 MM	Yamaha - 123cc (DT125 trail, DT125E, DT125F) 2 stroke, compression ratio 6.7:1, Year: 1973 on
Yamaha	Part no. 20559 STD	Yamaha - 96cc (RS100, RS100DX, RS100S) 2 stroke, compression ratio 7:1, Year: 1977 on
Yamaha	Part no. 20559 +.25 MM	Yamaha - 96cc (RS100, RS100DX, RS100S) 2 stroke, compression ratio 7:1, Year: 1977 on
Yamaha	Part no. 20559 +.75 MM	Yamaha - 96cc (RS100, RS100DX, RS100S) 2 stroke, compression ratio 7:1, Year: 1977 on
Yamaha	Part no. 20559 +1 MM	Yamaha - 96cc (RS100, RS100DX, RS100S) 2 stroke, compression ratio 7:1, Year: 1977 on
Yamaha	Part no. 20983 STD	Yamaha - 125cc (RD125, RD125DX) Year: 1975 on
Yamaha	Part no. 20983 +.5 MM	Yamaha - 125cc (RD125, RD125DX) Year: 1975 on
Yamaha	Part no. 20983 +.75 MM	Yamaha - 125cc (RD125, RD125DX) Year: 1975 on
Yamaha	Part no. 20983 +1 MM	Yamaha - 125cc (RD125, RD125DX) Year: 1975 on
Yamaha	Part no. 19786 STD	Yamaha - 50cc (MF2, U5 Pal Scooterette, U5A Pal Scooterette) compression ratio 7.4:1 Yamaha - 50cc (V50) compression ratio 6.6:1 Yamaha - 50cc (V50P, V50M, FSIE Mo-Ped, FS1, FS1EDX) 2 stroke compression ratio 7.1:1 Year: 1965 on
Yamaha	Part no. 21337 +.5 MM	Yamaha - (YB100) Year: 1975 on
Yamaha	Part no. 21337 +1 MM	Yamaha - (YB100) Year: 1975 on
Yamaha	Part no. 20351 STD	Yamaha - 398cc (RD400, RD400DX) Year 1976 on
Yamaha	Part no. 20351 +.25 MM	Yamaha - 398cc (RD400, RD400DX) Year 1976 on
Yamaha	Part no. 20351 +.5 MM	Yamaha - 398cc (RD400, RD400DX) Year 1976 on
Yamaha	Part no. 20351 +1 MM	Yamaha - 398cc (RD400, RD400DX) Year 1976 on
Yamaha	Part no. 20351 +.75 MM	Yamaha - 398cc (RD400, RD400DX) Year 1976 on
Yamaha	Part no. 21149 +.5 MM	Yamaha - 499cc, Year: 1976 on
Yamaha	Part no. 21149 +.75 MM	Yamaha - 499cc, Year: 1976 on
Yamaha	Part no. 21149 +1 MM	Yamaha - 499cc, Year: 1976 on
Yamaha	Part no. 20352 STD	Yamaha - 248cc (XS250) Year: 1977 on
Yamaha	Part no. 21139 STD	Yamaha - 98cc, Year: 1977 on
Yamaha	Part no. 21139 +.25 MM	Yamaha - 98cc, Year: 1977 on
Yamaha	Part no. 21139 +.5 MM	Yamaha - 98cc, Year: 1977 on
Yamaha	Part no. 21139 +1 MM	Yamaha - 98cc, Year: 1977 on
Yamaha	Part no. 21139 +1.5 MM	Yamaha - 98cc, Year: 1977 on
Yamaha	Part no. 20984 STD	Yamaha - 50cc (TY50, TY50M, DT50, DT50M, RD50, RD50M) Year: 1977 on
Yamaha	Part no. 20984 +.25 MM	Yamaha - 50cc (TY50, TY50M, DT50, DT50M, RD50, RD50M) Year: 1977 on
Yamaha	Part no. 20984 +.5 MM	Yamaha - 50cc (TY50, TY50M, DT50, DT50M, RD50, RD50M) Year: 1977 on
Yamaha	Part no. 20984 +.75 MM	Yamaha - 50cc (TY50, TY50M, DT50, DT50M, RD50, RD50M) Year: 1977 on
Yamaha	Part no. 20984 +1 MM	Yamaha - 50cc (TY50, TY50M, DT50, DT50M, RD50, RD50M) Year: 1977 on
Yamaha	Part no. 20984 +1.5 MM	Yamaha - 50cc (TY50, TY50M, DT50, DT50M, RD50, RD50M) Year: 1977 on
Yamaha	Part no. 20956 STD	Yamaha - 347cc (RD350LC) 2 stroke, Year: 1980-83
Yamaha	Part no. 20956 +.25 MM	Yamaha - 347cc (RD350LC) 2 stroke, Year: 1980-83
Yamaha	Part no. 20956 +.5 MM	Yamaha - 347cc (RD350LC) 2 stroke, Year: 1980-83
Yamaha	Part no. 20956 +.75 MM	Yamaha - 347cc (RD350LC) 2 stroke, Year: 1980-83
Yamaha	Part no. 20956 +1 MM	Yamaha - 347cc (RD350LC) 2 stroke, Year: 1980-83
Yamaha	Part no. 20992 STD	Yamaha - 247cc (RD250LC) Year: May 1980 on
Yamaha	Part no. 20992 +.25 MM	Yamaha - 247cc (RD250LC) Year: May 1980 on
Yamaha	Part no. 20992 +.5 MM	Yamaha - 247cc (RD250LC) Year: May 1980 on
Yamaha	Part no. 20992 +.75 MM	Yamaha - 247cc (RD250LC) Year: May 1980 on
Yamaha	Part no. 20992 +1 MM	Yamaha - 247cc (RD250LC) Year: May 1980 on
Yamaha	Part no. 20992 +1.25 MM	Yamaha - 247cc (RD250LC) Year: May 1980 on
Yamaha	Part no. 20992 +1.5 MM	Yamaha - 247cc (RD250LC) Year: May 1980 on
Yamaha	Part no. 21136 STD	Yamaha - 123cc (DT125MX) Year: 1981 on
Yamaha	Part no. 21136 +.25 MM	Yamaha - 123cc (DT125MX) Year: 1981 on
Yamaha	Part no. 21136 +.5 MM	Yamaha - 123cc (DT125MX) Year: 1981 on
Yamaha	Part no. 21136 +.75 MM	Yamaha - 123cc (DT125MX) Year: 1981 on
Yamaha	Part no. 21136 +1 MM	Yamaha - 123cc (DT125MX) Year: 1981 on
Yamaha	Part no. 21138 STD	Yamaha - (YZ125 J) Year: 1982 on
Yamaha	Part no. 21138 +.6 MM	Yamaha - (YZ125 J) Year: 1982 on
Yamaha	Part no. 21138 +1 MM	Yamaha - (YZ125 J) Year: 1982 on
Yamaha	Part no. 21140 +1.6 MM	Yamaha - (RD125 LC) 2 stroke, Year: 1982 on
Yamaha	Part no. 21140 +2 MM	Yamaha - (RD125 LC) 2 stroke, Year: 1982 on
Yamaha	Part no. 19786 +.25 MM	Yamaha - 50cc (MF2, U5 Pal Scooterette, U5A Pal Scooterette) compression ratio 7.4:1 Yamaha - 50cc (V50) compression ratio 6.6:1 Yamaha - 50cc (V50P, V50M, FSIE Mo-Ped, FS1, FS1EDX) 2 stroke compression ratio 7.1:1 Year: 1965 on
Yamaha	Part no. 19786 +.5 MM	Yamaha - 50cc (MF2, U5 Pal Scooterette, U5A Pal Scooterette) compression ratio 7.4:1 Yamaha - 50cc (V50) compression ratio 6.6:1 Yamaha - 50cc (V50P, V50M, FSIE Mo-Ped, FS1, FS1EDX) 2 stroke compression ratio 7.1:1 Year: 1965 on
Yamaha	Part no. 19786 +.75 MM	Yamaha - 50cc (MF2, U5 Pal Scooterette, U5A Pal Scooterette) compression ratio 7.4:1 Yamaha - 50cc (V50) compression ratio 6.6:1 Yamaha - 50cc (V50P, V50M, FSIE Mo-Ped, FS1, FS1EDX) 2 stroke compression ratio 7.1:1 Year: 1965 on
Yamaha	Part no. 19786 +1 MM	Yamaha - 50cc (MF2, U5 Pal Scooterette, U5A Pal Scooterette) compression ratio 7.4:1 Yamaha - 50cc (V50) compression ratio 6.6:1 Yamaha - 50cc (V50P, V50M, FSIE Mo-Ped, FS1, FS1EDX) 2 stroke compression ratio 7.1:1 Year: 1965 on
Yamaha	Part no. 19786 +1.5 MM	Yamaha - 50cc (MF2, U5 Pal Scooterette, U5A Pal Scooterette) compression ratio 7.4:1 Yamaha - 50cc (V50) compression ratio 6.6:1 Yamaha - 50cc (V50P, V50M, FSIE Mo-Ped, FS1, FS1EDX) 2 stroke compression ratio 7.1:1 Year: 1965 on
Yamaha	Part no. 20356/98 STD	Yamaha - 250cc (TZ250 A Block) 2 stroke TD3 Racing Engine Year: 1971-80
Yamaha	Part no. 20558 STD	Yamaha - 123cc (RS125) 2 stroke, compression ratio 6.9:1, Year: 1977 on
Yamaha	Part no. 20558 +.25 MM	Yamaha - 123cc (RS125) 2 stroke, compression ratio 6.9:1, Year: 1977 on
Yamaha	Part no. 20558 +.5 MM	Yamaha - 123cc (RS125) 2 stroke, compression ratio 6.9:1, Year: 1977 on
Yamaha	Part no. 20558 +.75 MM	Yamaha - 123cc (RS125) 2 stroke, compression ratio 6.9:1, Year: 1977 on
Yamaha	Part no. 20558 +1 MM	Yamaha - 123cc (RS125) 2 stroke, compression ratio 6.9:1, Year: 1977 on
Yamaha	Part no. 20560 STD	Yamaha - 247cc (DT250, DT250MX) 2 stroke, Year: 1977 on
Yamaha	Part no. 20560 +.5 MM	Yamaha - 247cc (DT250, DT250MX) 2 stroke, Year: 1977 on
Yamaha	Part no. 21137 STD	Yamaha - 171cc (DT175MX) Year: 1978-80
Yamaha	Part no. 21137 +.25 MM	Yamaha - 171cc (DT175MX) Year: 1978-80
Yamaha	Part no. 21137 +.5 MM	Yamaha - 171cc (DT175MX) Year: 1978-80
Yamaha	Part no. 21137 +.75 MM	Yamaha - 171cc (DT175MX) Year: 1978-80
Yamaha	Part no. 21137 +1 MM	Yamaha - 171cc (DT175MX) Year: 1978-80
Yamaha	Part no. 21137 +1.25 MM	Yamaha - 171cc (DT175MX) Year: 1978-80
Yamaha	Part no. 21137 +2 MM	Yamaha - 171cc (DT175MX) Year: 1978-80
Yamaha	Part no. 21140 STD	Yamaha - (RD125 LC) 2 stroke, Year: 1982 on
Yamaha	Part no. 21140 +.5 MM	Yamaha - (RD125 LC) 2 stroke, Year: 1982 on
Yamaha	Part no. 21140 +.6 MM	Yamaha - (RD125 LC) 2 stroke, Year: 1982 on
Yamaha	Part no. 21140 +1 MM	Yamaha - (RD125 LC) 2 stroke, Year: 1982 on
Yamaha	Part no. 16477 +.5 MM	Yamaha - 125cc (YA5) 2 stroke
Yamaha	Part no. 20556 STD	Yamaha - 171+cc (DT175, TY175B Trial) 2 stroke, compression ratio 6.2:1 Year: 1973-77
Yamaha	Part no. 16477 +.75 MM	Yamaha - 125cc (YA5) 2 stroke

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