Knocking sound from kdx

hey all, there is a knocking sound when idle coming from the motor. but when the clutch is pulled in, it is no longer there. it was there before and after replacing the top end last week (which the original piston looked great). the bike rides without issue; any help is appreciated.

bike is a 2005 kdx 220

The kips valves in KDX's make an awful diesel engine racket at idle. If it goes away when you pull in the clutch or rev the engine, then no worries. It's just the wonderful sound of your KIPS.

thanks a lot! i listened at every angle and just couldnt figure it out. feel better now.

Just the natural sound of the KIPS powervalve no worries its normal

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