[SpudRider]

Originally Posted by katflap

Just a guess, I wonder if it is a problem with the cam auto decompression mechanism.

Broken spring or perhaps an issue with the supporting washer.

see here

http://www.chinariders.net/showpost....08&postcount=4

Once again, it doesn't cost any money to remove the rocker cover, and inspect the rockers, cam shaft, tappets, et cetera. The rocker cover does not have a gasket. Instead of replacing a gasket, you merely spread a little black RTV between the mating surfaces of the cylinder head and rocker cover.