During the last couple of rides I have noticed a clattering noise from the engine around 3000rpm and above, it starts and idles like a Swiss Watch, quiet as a mouse, no smoke at all, but when the revs rise and under load it starts to clatter. The noise is getting worse for sure, but can be controlled with the throttle, back of and it quietens down. I’m thinking it maybe a little end problem, or worse Big End.
History of the engine is unknown to me, showing 36,000mls but who knows? It’s a 75 bike, I have read that some early engines suffered from little end issues but not so much later engines.
I am going to drain the oil today to see what’s in it, to verify that it may be the cam chain guide or not.
The chain tension was checked last month when I first noticed a small noise, and was OK.
History of the engine is unknown to me, showing 36,000mls but who knows? It’s a 75 bike, I have read that some early engines suffered from little end issues but not so much later engines.
I am going to drain the oil today to see what’s in it, to verify that it may be the cam chain guide or not.
The chain tension was checked last month when I first noticed a small noise, and was OK.