I took the Cat out yesterday for the first time, and all I can say is WOW. The lift, speed, ride, and handling is amazing. The ga didnt work, but with the 25 tempest I got it to run about 5900 rpms with just a small rooster tail about (about to the bottom of th cowling). Which I would guess to be low 70s. I think it would run good with maybe a 27 on it.