Originally posted by Team-RTR
they seem to be ultra fast, but the only thing im iffy about is the fact that the piston and liner material is AAC, which if im not mistaken lasts only a very very sort time before a rebuild is needed, can anyone verify this?
I have heard that when the piston and liner material is AAC it does shorten the life of the motor. I even heard that you can't replace and AAC piston and liner??? Not sure about that .......
However AAC does give better heat dispersion than ABC.....