I put a new rubber gasket on the connection between my pipe and silencer, however, I still have oil spit out of this over my swing arm. Does this mean my carb is jetted incorrectly? I pre mix 32:1. Everything on my bike is stock. Will pre mixing @ 40:1 rectify this problem? I use Kawachem racing oil. Is it really safe to mix this 40:1? Thanks for the help