Originally Posted by
dan_vector
That's normal for all engines.
It shouldn't start to pinch until after the piston clears the exhaust port towards the top 1/4 of the sleeve when new.
Yea that's what I thought too but some of my race .21 had pinch earlier than the top of the exhaust. Triton rc for example
the itd engine feels a lot smoother at the bottom too compared to other engines I've had thats why I was confused a bit.
I also hear these are all pre run so that would explain things too. Thanks for the reply