Hello

I have a 1990 CBR1000F that has started to develop a buzz around 4000rpm and up. Its related to engine speed, because I can pull in the clutch on the road and it disappears. The onlything recently I've done is put new tires on and changed the chain and sprockets. Neither one of those should cause this buzz.

Does anyone have any suggestions to what might be causing this? Thanks for the help!

 

HI

maybe you need to adjust the balancers

 

Check your chain alignment
+1 Adjust the engine balance shaft

 

check your engine to frame bolts are all tight and the rubbers in your foot pegs are ok.