just radared the teryx at 78mph @ 8950rpm and it was still pulling, it will easily do over 80mph. that is damn fast in a sxs. this is with vforcejohns stageIII clutch mods. if you want to go fast get a hold of john, he knows these clutches better than anyone. he did mine a year ago and i have had no problems, his customer support is top notch also. thanks John!