i used to race a tm 400 it was so fast they banned it from racing the next year with a full 5 galon desert tank and alloy wheels and plastic fenders it weighed 260 pounds and made 50 hp at the rear wheel i quit racing and sold it i want another one but cant find one the bigger engine the better it will teach you respect for the bike and what you think you can do with it .be careful and dont get hurt