Join Date: Jul 2010
Location: Formerly Gold Coast now Broken Hill
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Rattles from the engine
In the last few hundred kilometres my motor has developed a rattle on the right hand side. It can be easily heard but not loud between 3 & 4K and again between 5 & 6 and a half k. It's a constant rattle with no odd timing to it that at first I thought was valve clearances or some other overhead noise but the clearances were done only a few thou ago, so for the time being I'm ruling that out. The bike is now at the shop, they checked timing chain, cam sprockets and clutch which all checked out. They found movement in the oil pump drive sprocket that comes off the back of the clutch so that has been replaced.
Guess what? Motor back together, new oil and filter.. still makes the noise.
Any suggestions as to what it could be? I'm hoping its not big end bearings or something requiring massive labour costs. Would I be better off replace the motor entirely given that it's got 78,000 ks on it (48,000 miles approx)? I have ridden it hard but not rough if that makes sense, meaning no agro throttle openings, rarely wheelied or bounced off the limiter.
Anything anyone can think of will be greatly appreciated.