Re: G1 bore
I'm at a loss. I'm suposed to know this, guess I'm getting older and can't remember all the part numbers and spec's. Yamaha sells .25/.50/.75/1.00 oversized piston and rings for G1's and I can not find any spec's for you in the service manual, sorry. You can buy a cylinder kit, "cylinder/piston/rings/pin/clips from many site sponsor's. Did you clean the top of the piston and get any identifiying numbers. Wish I could have been more help.
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