Possibly some one can give me some info on my 91 ac. I received this engine used and have been tring to get it running right for a while. The low end and the transition are set good but the top although it runs ok it appear to put out a lot of smoke(FOG). It is way more than any 2 stroke I run.The compresson seems ok. The Fuel is Wild Cat 20/20, Os f plug. Is this normal . I have nothing to compair it to.