easy now on the polaris bashing.. my wifes trail boss is a 1990 and still on the stock motor!!!!! never been owpend up!! 250cc 2 stroke full auto.. most reialbe damn quad ever!! and it gets rode hard!!! i still cant get good wheelies with it though... and beyond what people say the 660r is a big fat heavy big.. ask must85 the power is nice even though a honda 450r is faster... but the 660r pulls good threw the rpms.. but when youy get stuck you better be super man or have afriend to help you get it out cuz they are f'in heavy... i have a friend with a preditor and it straight throws the fk down!! passed al lthe 4x4 quads in the mud pit and put astraight line hurtin on a 400ex, and a lt250r and walked away from a modded king quad? sportsman? 800cc.. its piped jetted and rev box and its pretty much stupid fast!!!! thats just from what i have seen...