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Sounds like a constant knocking. A friend had same bike and said his rapped like that also. Does not sound normal to me. It increases as engine rpm does also. Thought it was a piston skirt but just completed a top end tear down and replaced top end but that was not it. Connecting rod play fine. Anyone with the same problem or knows what this could be? Runs fine, just a irratating rap to it! Thanks in advance!
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I agree, all rap is irritating! -
I had that happen with my Fourtrax 250R, turned out to be crank bearings.
Another guy I know had a weird engine noise in his 2 stroke and it was the clutch throw out bearing.
The clutch bearing is easy to check and cheap to replace, crank bearings won't be anywhere near as cheap or easy.
Good luck!Comment
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Everything felt tight in regards to crank when I just had it apart.Comment
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Your rod bearings may have been in good shape but the crank bearings in the inner cases could be shot and it would be hard to tell without splitting the cases and spinning them by hand.
Also check your water pump bearings. It's got to be from a bad bearing somewhere.Comment
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