Yamaha rhino 660 parts work in the clutch. Current set up for my 2013 is JBS 14g OD weights and EPI purple spring. Great response in the trail but only 42-43 mph top end. I will be changing back to the EPI white spring as I was running 47-48mph with that during testing. I'm told the real sweet spot is a combo of 12-14g OD weights.