Fizz, and all. Sorry to say I had a black plastic retainer fail on me at the fall Huntsville AL.
race. It CRUMBLED, and the pieces are hard enouch to score a piston. Bare in mind that
this was at Club 40 RPM's and not 424 RPM's! I lapped out the piston, but there was still a
significant score in the piston, and even though I will race it, it will never be as good as
new. I thought Thunder Tiger had fixed their rear bearing problem in the TT Pro 40/46
engines, but if I buy a new or used engine, I will definately replace the bearings, regardless
of which generation is in the engine. This was my experience, and I just wanted to share
everyone. Good luck, Greg