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hi. I've recently bought a cbr 1000 on an 06 plate with full dealer history and 3400 miles on the clock. The bike is mint EXCEPT for a knocking noise from the engine, only at up to 2000 rpm, and only when the engine is warmed up. The noise is pretty minor and i may just be being a bit paranoid, i was hoping somebody else may have had a similar experience and could advise whether it is normal or may have any thoughts on what the problem may be? Many thanks. Marc.
 

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Did it just start, or was it that way when you bought it?

Did you check the oil level?

If the previouse owner let it run low it could be a main bearing, worn out rod journals, or piston slap. But it goes away so thats wierd.

Did you check the coolant for oil?

If the oil looks good and there is no oil in the coolant, I'd run into the dealership. Might save you from having something small turn into something big.
 
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