ported and piped 250's with or with out power vavles can't even get close. by the time i hit fourth they are about 300 yard back and fading fast. my bad on those hp estimates it more like 65 rwhp with around the same or slightly higher torque number and its not just ported. this is all just rough estemates. it does feel like alot more than it actually is ,but who really needs to be going over 100 mph on two wheels in the dirt any way right. trie to attach a dyno shee but it too big