Kab wilcox
CB750 Member
I have a 1980 CB750F have spark and fuel plus it has the top end rebuilt. But it seems that it pushes air back through the carb before the intake stroke. Everything is pointing towards the valve shims. Just wondering if it is easy to change the shims while the engine is still in the frame? Because I really really don’t want to take the engine off the frame. Lol any feedback would be appreciated thx.