I am wondering what tools you need to cut your own sheave. I have a lathe and mill drill, is that all you need to cut your own because I know what needs to be done for the weights to move farther out. I dont know exactly what to cut it to, but I can try before spending money on a new cut one.
The most noted area milled or relieved is the area(s) where the rollers ride. Most often it's the far "outside" (vertical wall). Sometimes, the opposite side (inner) wall is also relieved. This allow's the assy to have more throw/travel. Typically the kits will provide spacers (washers or nuts) that are to be placed between the sheave and cover. This works in conjuction with the relieved sheave to gain the addl travel for the Assy. A lot of people use the OEM Grizzly sheave as it's more relieved than the OEM Rhino one. Recently I saw one that came from a well know race shop. It turmed out to just be a re-packaged Grizzly sheave with their name on it. There's tons of mod's for centrifical clutch ATV's: LT80, Polaris Etc. The mod theory's are pretty much the same... Less rollers, lighter rollers, bigger springs, Etc. Carefull crazy mod's can lead to having to do the clutch maintenance more often.
Well if you want a lower bottom end take off ratio, and slower engine braking, and a taller top speed clutch ratio, check this out.
Top speed on a stock efi700 rhino is 42 mph with my mods, and not over reving the motor you will see 48-49 mph, and a 6-7% lower ratio for improved bottom end performance.
You will have the best of both worlds! and by far the best bank for your buck!
Rhino 660 sheave
