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Failed main bearing ?
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[QUOTE="freakystyley, post: 1139744, member: 73918"] 1995 YZ250, with what I suspect are bad main bearings. At idle there is a metallic knocking sound that seems to be in sync with engine rotation. Sort of like a bad/burnt/flat spot on a bearing. idle is also very rough and labored - not smooth and "free." Clutch/inner hub/basket/cable/springs are all new. carb and air cleaner clean. Other than that, she runs great! :yikes: I am going to split the cases to verify, but noticed on the parts view there are bearings and thrust washers in the crank itself. If the tranny ran extremely low on fluid (don't ask) and burnt the mains, can those crank bearings go bad as well? I have a top on order along with the mains...just wondering if she needs a crank rebuild too while its apart. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
Failed main bearing ?
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