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Knockin' Not Rockin'


nordy
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Hi All , need abit of help, 2011 sherco 290 started to knock for no reason replaced main , big end bearings con rod small end and pin, piston and barrel where perfect, but engine still knocking, puzzled, any ideas would be great. Thanks

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Well, from what you have stated it is not the top end, the bottom end or the gears, so it must be fine!

Let us see and hear a vid ofit! It is difficult to diagnose noises or the tinternet. My crystal ball sucks!

You state replacing big end bearing? Possibly so, however last time I checked, thece come in a conrod kit with a new rod and crankpin. You know, the other mating wear parts there upon a true lower end knock. What is your clearance Clarence?

There are only so many rotating parts there, you know!

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Thanks Copemech, Naichuff,Melba26, Heffergm, Dadof2 and last but not least Thats a five for all of your input , Melba26 you where close , it turned out to be the clutch rubbers, never thought they would cause such a knocking noise, lesson learned, thanks again for your help.

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