Length of 1980 YZ125 Gudgeon Pin

[Simo63]

As the title says, I am looking to confirm the length of a standard YZ125 Gudgeon Pin.

Do they increase in size as the piston oversize increases?

Can anyone help?

Thanks
Simo

[GMC]

They stay the same length Simo
The pistons and their oversizes are all from the same castings/forgings and then machined to suit. I'm sure they would all have the gudgeon circlips in the same place no matter what oversize they were.

BTW...
Part # = 137-11633-00-00
Part Description = PIN,PISTON - Replacement Number = 137-11633-10-00 *
Model Count = 105
AT1B 1970 125 AT1 Enduro Dual-Purpose
AT1C 1971 125 AT1 Enduro Dual-Purpose
AT1E 1969 125 AT1 Enduro Dual-Purpose
AT1M 1969 125 AT1M Enduro Dual-Purpose
AT1MB 1970 125 AT1M Enduro Dual-Purpose
AT1MX 1971 125 AT1MX Enduro Dual-Purpose
AT2 1972 125 AT2 Enduro Dual-Purpose
AT2M 1972 125 AT2M Enduro Dual-Purpose
AT3 1973 125 AT3 Enduro Dual-Purpose
ATMX 1973 125 ATMX Enduro Dual-Purpose
CS340EB 1998 340 CS340E Ovation Snowmobile
CS340EC 1999 340 CS340E Ovation Snowmobile
CS340ED 2000 340 CS340E Ovation Snowmobile
CS340EN 1989 340 CS340E Ovation Snowmobile
CS340EP 1990 340 CS340E Ovation Snowmobile
CS340ER 1991 340 CS340E Ovation Snowmobile
CS340ES 1992 340 CS340E Ovation Snowmobile
CS340ET 1993 340 CS340E Ovation Snowmobile
CS340EU 1994 340 CS340E Ovation Snowmobile
CS340EV 1995 340 CS340E Ovation Snowmobile
CS340N 1989 340 CS340 Ovation Snowmobile
CS340P 1990 340 CS340 Ovation Snowmobile
DS6B 1970 250 DS6 Street
DS6C 1969 250 DS6 Street
DT125A 1974 125 DT125 Dual Purpose
DT125B 1975 125 DT125 Dual Purpose
DT125C 1976 125 DT125 Dual Purpose
DT125E 1978 125 DT125 Dual Purpose
DT125F 1979 125 DT125 Dual Purpose
DT125G 1980 125 DT125 Dual Purpose
DT125H 1981 125 DT125 Dual Purpose
EC340J 1985 340 EC340 Excel III Snowmobile
EC340K 1986 340 EC340 Excel III Snowmobile
EC340L 1987 340 EC340 Excel III Snowmobile
EC340M 1988 340 EC340 Excel III Snowmobile
ET300D 1980 300 ET300 Enticer Snowmobile
ET300F 1982 300 ET300 Enticer Snowmobile
ET300G 1983 300 ET300 Enticer Snowmobile
ET300H 1984 300 ET300 Enticer Snowmobile
ET340D 1980 340 ET340 Enticer Snowmobile
ET340E 1981 340 ET340 Enticer Snowmobile
ET340ED 1980 340 ET340E Enticer Snowmobile
ET340F 1982 340 ET340 Enticer Snowmobile
ET340G 1983 340 ET340 Enticer Snowmobile
ET340H 1984 340 ET340 Enticer Snowmobile
ET340J 1985 340 ET340 Enticer Snowmobile
ET340K 1986 340 ET340 Enticer Snowmobile
ET340L 1987 340 ET340 Enticer Snowmobile
ET340M 1988 340 ET340 Enticer Snowmobile
ET340TE 1981 340 ET340T Enticer Snowmobile
ET340TF 1982 340 ET340T Enticer Snowmobile
ET340TG 1983 340 ET340T Enticer Snowmobile
ET340TH 1984 340 ET340T Enticer Snowmobile
ET340TJ 1985 340 ET340T Enticer Snowmobile
ET340TK 1986 340 ET340T Enticer Snowmobile
ET340TL 1987 340 ET340T Enticer Snowmobile
ET340TM 1988 340 ET340T Enticer Snowmobile
ET340TRK 1986 340 ET340TR Enticer Snowmobile
ET340TRL 1987 340 ET340TR Enticer Snowmobile
ET340TRM 1988 340 ET340TR Enticer Snowmobile
IT125G 1980 125 IT125 Dual-Purpose
IT125H 1981 125 IT125 Dual-Purpose
MX125A 1974 125 MX125 Off-Road
MX125B 1975 125 MX125 Off-Road
MX125C 1976 125 MX125 Off-Road
TD2 1970 250 TD2 Road Racer
TD2B 1971 250 TD2 Road Racer
TDR250A 1990 250 TDR250 Dual-Sport
TDR250W 1989 250 TDR250 Dual-Sport
TZ125G 1980 125 TZ125 Road Racer
TZ250A 1990 250 TZ250 Road Racer
TZ250H 1981 250 TZ250 Road Racer
TZ250H1 1996 250 TZ250 Road Racer
TZ250J 1982 250 TZ250 Road Racer
TZR250T 1987 250 TZR250 Road Racer
TZR250U 1988 250 TZR250 Road Racer
YA6 1966 125 YA6 Santa Barbara 125 Street
YDS5 1967 250 YDS5 Catalina Electra 250 Street
YT125G 1980 125 YT125 ATV
YT125H 1981 125 YT125 ATV
YT125J 1982 125 YT125 ATV
YT125K 1983 125 YT125 ATV
YT125L 1984 125 YT125 ATV
YT125N 1985 125 YT125 ATV
YZ125A 1974 125 YZ125 Competition Motocross
YZ125A1 1990 125 YZ125 Competition Motocross
YZ125B 1975 125 YZ125 Competition Motocross
YZ125B1 1991 125 YZ125 Competition Motocross
YZ125C 1976 125 YZ125 Competition Motocross
YZ125D 1977 125 YZ125 Competition Motocross
YZ125D1 1992 125 YZ125 Competition Motocross
YZ125E 1978 125 YZ125 Competition Motocross
YZ125E1 1993 125 YZ125 Competition Motocross
YZ125F 1979 125 YZ125 Competition Motocross
YZ125G 1980 125 YZ125 Competition Motocross
YZ125H 1981 125 YZ125 Competition Motocross
YZ125J 1982 125 YZ125 Competition Motocross
YZ125K 1983 125 YZ125 Competition Motocross
YZ125L 1984 125 YZ125 Competition Motocross
YZ125N 1985 125 YZ125 Competition Motocross
YZ125S 1986 125 YZ125 Competition Motocross
YZ125T 1987 125 YZ125 Competition Motocross
YZ125U 1988 125 YZ125 Competition Motocross
YZ125W 1989 125 YZ125 Competition Motocross
YZ125X 1976 125 YZ125X Competition Motocross

[Digga]

GMC, where did you get all that data from??? Do you sell engine parts as well???

[Simo63]

Geoff "the legend" said"

They stay the same length Simo
The pistons and their oversizes are all from the same castings/forgings and then machined to suit. I'm sure they would all have the gudgeon circlips in the same place no matter what oversize they were.

BTW...
Part # = 137-11633-00-00
Part Description = PIN,PISTON - Replacement Number = 137-11633-10-00 *
Model Count = 105
blah
blah
blah

Hey mate, many thanks for the response     

[GMC]

GMC, where did you get all that data from??? Do you sell engine parts as well???

Info comes from Zedder, a cross reference program that is mostly reliable / sometimes unreliable.
I do sell aftermarket engine parts, I just don't push it that much as I don't get asked that much, bit catch 22 I suppose.

Geoff "the legend" said"
blah
blah
blah

That seems to be all my family hear when I talk as well

[Simo63]

I do sell aftermarket engine parts, I just don't push it that much as I don't get asked that much, bit catch 22 I suppose.

What aftermarket enigne parts do you sell Geoff??  Always looking for ways to support local guys when I can.

[yamaico]

They stay the same length Simo
The pistons and their oversizes are all from the same castings/forgings and then machined to suit. I'm sure they would all have the gudgeon circlips in the same place no matter what oversize they were.

BTW...
Part # = 137-11633-00-00
Part Description = PIN,PISTON - Replacement Number = 137-11633-10-00 *
Model Count = 105
AT1B 1970 125 AT1 Enduro Dual-Purpose
AT1C 1971 125 AT1 Enduro Dual-Purpose
AT1E 1969 125 AT1 Enduro Dual-Purpose
AT1M 1969 125 AT1M Enduro Dual-Purpose
AT1MB 1970 125 AT1M Enduro Dual-Purpose
AT1MX 1971 125 AT1MX Enduro Dual-Purpose
AT2 1972 125 AT2 Enduro Dual-Purpose
AT2M 1972 125 AT2M Enduro Dual-Purpose
AT3 1973 125 AT3 Enduro Dual-Purpose
ATMX 1973 125 ATMX Enduro Dual-Purpose
CS340EB 1998 340 CS340E Ovation Snowmobile
CS340EC 1999 340 CS340E Ovation Snowmobile
CS340ED 2000 340 CS340E Ovation Snowmobile
CS340EN 1989 340 CS340E Ovation Snowmobile
CS340EP 1990 340 CS340E Ovation Snowmobile
CS340ER 1991 340 CS340E Ovation Snowmobile
CS340ES 1992 340 CS340E Ovation Snowmobile
CS340ET 1993 340 CS340E Ovation Snowmobile
CS340EU 1994 340 CS340E Ovation Snowmobile
CS340EV 1995 340 CS340E Ovation Snowmobile
CS340N 1989 340 CS340 Ovation Snowmobile
CS340P 1990 340 CS340 Ovation Snowmobile
DS6B 1970 250 DS6 Street
DS6C 1969 250 DS6 Street
DT125A 1974 125 DT125 Dual Purpose
DT125B 1975 125 DT125 Dual Purpose
DT125C 1976 125 DT125 Dual Purpose
DT125E 1978 125 DT125 Dual Purpose
DT125F 1979 125 DT125 Dual Purpose
DT125G 1980 125 DT125 Dual Purpose
DT125H 1981 125 DT125 Dual Purpose
EC340J 1985 340 EC340 Excel III Snowmobile
EC340K 1986 340 EC340 Excel III Snowmobile
EC340L 1987 340 EC340 Excel III Snowmobile
EC340M 1988 340 EC340 Excel III Snowmobile
ET300D 1980 300 ET300 Enticer Snowmobile
ET300F 1982 300 ET300 Enticer Snowmobile
ET300G 1983 300 ET300 Enticer Snowmobile
ET300H 1984 300 ET300 Enticer Snowmobile
ET340D 1980 340 ET340 Enticer Snowmobile
ET340E 1981 340 ET340 Enticer Snowmobile
ET340ED 1980 340 ET340E Enticer Snowmobile
ET340F 1982 340 ET340 Enticer Snowmobile
ET340G 1983 340 ET340 Enticer Snowmobile
ET340H 1984 340 ET340 Enticer Snowmobile
ET340J 1985 340 ET340 Enticer Snowmobile
ET340K 1986 340 ET340 Enticer Snowmobile
ET340L 1987 340 ET340 Enticer Snowmobile
ET340M 1988 340 ET340 Enticer Snowmobile
ET340TE 1981 340 ET340T Enticer Snowmobile
ET340TF 1982 340 ET340T Enticer Snowmobile
ET340TG 1983 340 ET340T Enticer Snowmobile
ET340TH 1984 340 ET340T Enticer Snowmobile
ET340TJ 1985 340 ET340T Enticer Snowmobile
ET340TK 1986 340 ET340T Enticer Snowmobile
ET340TL 1987 340 ET340T Enticer Snowmobile
ET340TM 1988 340 ET340T Enticer Snowmobile
ET340TRK 1986 340 ET340TR Enticer Snowmobile
ET340TRL 1987 340 ET340TR Enticer Snowmobile
ET340TRM 1988 340 ET340TR Enticer Snowmobile
IT125G 1980 125 IT125 Dual-Purpose
IT125H 1981 125 IT125 Dual-Purpose
MX125A 1974 125 MX125 Off-Road
MX125B 1975 125 MX125 Off-Road
MX125C 1976 125 MX125 Off-Road
TD2 1970 250 TD2 Road Racer
TD2B 1971 250 TD2 Road Racer
TDR250A 1990 250 TDR250 Dual-Sport
TDR250W 1989 250 TDR250 Dual-Sport
TZ125G 1980 125 TZ125 Road Racer
TZ250A 1990 250 TZ250 Road Racer
TZ250H 1981 250 TZ250 Road Racer
TZ250H1 1996 250 TZ250 Road Racer
TZ250J 1982 250 TZ250 Road Racer
TZR250T 1987 250 TZR250 Road Racer
TZR250U 1988 250 TZR250 Road Racer
YA6 1966 125 YA6 Santa Barbara 125 Street
YDS5 1967 250 YDS5 Catalina Electra 250 Street
YT125G 1980 125 YT125 ATV
YT125H 1981 125 YT125 ATV
YT125J 1982 125 YT125 ATV
YT125K 1983 125 YT125 ATV
YT125L 1984 125 YT125 ATV
YT125N 1985 125 YT125 ATV
YZ125A 1974 125 YZ125 Competition Motocross
YZ125A1 1990 125 YZ125 Competition Motocross
YZ125B 1975 125 YZ125 Competition Motocross
YZ125B1 1991 125 YZ125 Competition Motocross
YZ125C 1976 125 YZ125 Competition Motocross
YZ125D 1977 125 YZ125 Competition Motocross
YZ125D1 1992 125 YZ125 Competition Motocross
YZ125E 1978 125 YZ125 Competition Motocross
YZ125E1 1993 125 YZ125 Competition Motocross
YZ125F 1979 125 YZ125 Competition Motocross
YZ125G 1980 125 YZ125 Competition Motocross
YZ125H 1981 125 YZ125 Competition Motocross
YZ125J 1982 125 YZ125 Competition Motocross
YZ125K 1983 125 YZ125 Competition Motocross
YZ125L 1984 125 YZ125 Competition Motocross
YZ125N 1985 125 YZ125 Competition Motocross
YZ125S 1986 125 YZ125 Competition Motocross
YZ125T 1987 125 YZ125 Competition Motocross
YZ125U 1988 125 YZ125 Competition Motocross
YZ125W 1989 125 YZ125 Competition Motocross
YZ125X 1976 125 YZ125X Competition Motocross

That's why I love Yamahas, interchangeability. Old mate can get good bragging rights by using a TZ250 gudgeon pin in his AT1