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Old 02-23-2009, 03:26 PM   #17
Olas OP
the darkness
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Joined: Aug 2007
Location: Boulder, CO
Oddometer: 4,085
Need input....

Guys, i'm not sure what to do here. Need some input. The cylinder "looks" to me like it could just be honed and another (new) 76mm piston be fitted. Not too sure though, i'd have to take it to the shop and have them tell me. Though, i'm wondering also if I should just buy a 77mm piston and have them bore it over 1mm. I'm even contemplating buying a new sleeve and starting at 74So, here are my questions:

How big can you go with these stock sleeves? I see you can buy pistons up to 78mm. Is the sleeve prone to any damage being bored out so much? Will I have to modify my gaskets (Moose complete engine kit) to fit a 77mm piston?

So many options to choose from, I may be leaning towards a 77mm piston more than the others though. Thoughts on this?

Rebuild threads:
'92 XT600, '87 XR250R
Lighten up, Francis.
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