I gave the engine a good cleaning. I mic'ed the crankshaft and the crankshaft bushing (no bearings), and I got about .003-.005 clearance. Which I think is fair for a used engine. So I think I'll try a lower nitro and see what happens. So this weekend will be in the backyard tuning the carb. Wish me luck and I try to keep all my fingers.

cheers,

Tim

p.s. thanks everybody for your suggestions. I love this website.