CBR 125 (SONIC ASIA) Exhust vale keeps on going tight?

Ok John Thanks for your help I think you are right about valve seat will check if necessary. John Corkin

John Corkin
May 2009

If the cam was wearing, the tappet clearance would actually increase, rather than decrease....the normal situation here would be the valve wearing into its seat, due to the hard coating being worn away. I can't think of any other reason for this one!

John
April 2009