i have a Go 5 port, this past weekend i ran the motor with a 9886 NR pipe and got 9.5 min! the motor is super fast a really smooth. Thanks to Pro Twister Mods I ran a the Battle at the Beach, the track was smooth, grooved, but also a little slick in some sections, some motors that i have owned have not taken well to smooth throttle input, but this motor does. Great job on this one Brian