I've found other 89mm pistons for other makes and models, but that's all I know about the other pistons... I don't know if the pin hight/stroke would be too low or too high, or if the pins would be the same size for the rod. I'm assuming it has to be possible to use a different available piston, like how when people turn their motors on their vehicles into stroker motors... I just can't find any helpful information on this motor for the traxter. I can't even find if I'd be able to bore the cylinder from 89mm to 99mm without making the cylinder too thin and be able to use a piston from a 05, because I found a site that sells new pistons for the 05 traxter, but like I said, mine being a 00 takes a 89mm