Author Topic: YZ125 cylinder head O-ring groove  (Read 2155 times)

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Offline James P

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YZ125 cylinder head O-ring groove
« on: September 21, 2020, 08:56:18 PM »
Anyone got a YZ125 cylinder (1986 or later) lying about from which they could take some measurements?

I'm looking for the dimensions of the O-ring groove for the combustion chamber (ID, OD, depth).

There are/were different O-rings used for sealing the combustion chamber, depending on the year of manufacture:

93210-65721 - YZ125 1986-1993
93210-63442 - YZ125 1994 onwards

If anyone is in a position to supply measurements, please let me know the year and/or model code of the cylinder you have measured.

Thanks in advance & regards,
James