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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
1971 Kawasaki Bison (F8)
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[QUOTE="reepicheep, post: 1402738, member: 104942"] Thanks! I have a contact for one local guy that did a good job for a friend with an XR-650 that needed rebored... and the guy is a triumph guy, so he should know the techology for that era. I'll talk to him and see what kind of vibe I get, and if it's not good just call Eric. Thanks for the ongoing help all! Now I have to decide if I want to split the cases. The transmission cavity looks pristine. The stuff that came out of the crankcase was a brown goo, but was mostly petroleum of some kind. I think it was mainly stuff all of us were using to try and loosen up the cylinder. The crank now spins free and reasonably smooth, and after flushing the crankcase 3 or 4 times with gasoline and foaming engine degreaser it is starting to come out pretty clean. Soaking in diesel overnight right now. I know the safe option is to split the cases and have a look in there, but I wish I could find some reason somewhere to really know I have to split the cases first. So far everything in there (aside from being really dirty) looks fine. The only hint of a problem I have found so far (besides the brown goo that pumped out) was very minor pitting on the small end crank roller bearing. But that poor guy was stuck up in that piston for maybe 30 years. I don't mind splitting the case, but I worry about creating a problem finding a bearing or seal that was discontinued 40 years ago. I guess the crank bearings are the only ones that really get damaged in the process of doing a split, so if I can source those bearings and seals I should probably just split it and replace them. Maybe I'll find evidence of a crank seal when I pull the primary and clutch covers. I did notice a little right to left play along the direction of rotation on the disc valve. Was that normal for these motors? [/QUOTE]
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Dirt Bike Discussions By Brand
Kawasaki MX & Off-Road Dirt Bikes
1971 Kawasaki Bison (F8)
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