I just picked up a 79’ xs650 with what appears to be a 73’ engine. I’ve pulled the engine and began to tear it down. It looks as if the head gasket blew pretty good. No damage any where else I see. Valves look good pistons are worn but not destroyed and bores aren’t bad. Rods have no knock and minimal radial movement. (If anyone has a tolerance on side to side radial movement at the connecting rod please share)
So I’m looking at piston kits and measured the bores last night at 2.955” which appears to be 3rd oversized 75mm. Where can I get a piston to have these jugs rebored and cleaned up? Would JE 700cc kit be more than 75mm? I wouldn’t mind a little extra pep. If not is there a better route?
Also noticed a crack in the clutch cover. Appears that the clutch pressure plate was rubing heavily on the side cover. Also have some silicone on the opposite side of where the pushrod and seal protrude. Contemplating splitting the cases but now would be the time to do so if necessary. Feel free to share thiyghts and opinions. Thanks
So I’m looking at piston kits and measured the bores last night at 2.955” which appears to be 3rd oversized 75mm. Where can I get a piston to have these jugs rebored and cleaned up? Would JE 700cc kit be more than 75mm? I wouldn’t mind a little extra pep. If not is there a better route?
Also noticed a crack in the clutch cover. Appears that the clutch pressure plate was rubing heavily on the side cover. Also have some silicone on the opposite side of where the pushrod and seal protrude. Contemplating splitting the cases but now would be the time to do so if necessary. Feel free to share thiyghts and opinions. Thanks