I immediately took mine apart and swapped to the red power spring. Works and fits just like OEM and accepted the power spring just fine. My lifted cart with 23" tires now goes up hills and holds back great going down hill. Couldn't be happier! Good luck getting your old clutch off, mine came off in about a hundred little pieces and that's what made me buy this so if you are reading this you probably already broke your old one... Hang in there and start cutting and torching, once you get this new one on you will be good to go. Rebuild your drive clutch too, this driven was only half of my problems...