RE: Tmaxx basher
Sounds normal to me. These engines don't have rings, so to make for good compression they have tapered sleeves. The sleeve is made from chrome plated brass, the piston is aluminum. When it warms up the sleeve expands more than the piston, allowing the piston to move up and down more easily. That's 'pinch' in a nutshell. This is why you have to break in the engine....to allow the piston and sleeve to wear into each other making for a precise fit and good compression. It's always good to make sure your engine is at least room temperature when starting, to lessen the amount of stress placed on the internals, mainly the rod. BTW, nice looking maxx.