[SBSerpent]

I will try the phenolic spacer route. Right now, it appears that I just have a 1/16" (?) paper (?) gasket at the carburetor base. I will get at least a 1/4" phenolic spacer to start and see if that helps the situation. I will have to swap out the oval "Cobra" air cleaner because once I raise the carburetor, I will have interference issues between the air cleaner and the cowl. A conventional round air cleaner will solve the clearance issues.

On another note, how does the increased thickness of spacers impact performance? Is thicker better, not just from an insulation standpoint, but from a performance standpoint. Also, do I go with a spacer that has a four hole center or one with a large one hole center?