What is the final bore size for the 3rd gen 85-86 250r stock sleeve? I see on ebay there is a 69.5mm top end kit. This seems huge to me. Here I thought 68mm or 2mil was the final bore.
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What is the final bore size for the 3rd gen 85-86 250r stock sleeve? I see on ebay there is a 69.5mm top end kit. This seems huge to me. Here I thought 68mm or 2mil was the final bore.
"I'm Kind Of Like The Turtle Man Of 3Wheelers."
1986 Honda 350X
1985 Honda 250R
1985 Honda 200X
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On 85/86 you can go 69.50 with the pro-x piston, and 70.00mm with a yz piston. With a stock stroke that makes a 277cc.
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