bullet-proof and RZR are hard to put in the same sentence. much less the same paragraph.
we have figured out what it takes to make them run on the Rzr Turbo without blowing belts. making the clutch itself live is the only hard part. we have a few different setups we are running around with and trying to test. there are other vendors that are trying stuff as well. the design of the new Rzr Turbo primary is really nice. strong, thick, heavy, durable, are all words that would describe the primary clutch, except for one small oversight. Polaris has acknowledged the issue and has tried working on a fix without an easy solution as of right now. The stainless shims that 3P produces seem as if they would be a perfect fix, and polaris has tested them as well without much more success than stock. the problem is that the sliders on the clutch, that allow the clutch to slide up and down, are made of abs plastic. these plastic sliders wear out. they have too much friction between themselves and the tower of the clutch in which they slide against. this friction causes the abrasive ABS plastic to wear into the towers of the primary. these plastic sliders are brittle and will break, they also have a relatively low melting point and they will melt under extreme clutch temps. in the past polaris as well as many other clutch manufacturers have used a different sort of material for all sliding clutch parts. these other materials have proven widely successful in allowing the clutch parts to slide back and forth with little friction and little wear to the clutch. i am not sure why polaris chose to use the particular material they did for this clutch, but they did and its proving to be pretty much the achilles heel for the clutch. they built the slider to slide back and forth on the spyder which causes the slider to wear. this slider needs to stay centered on the spyder to be able to allow the clutch to slide open and closed like it should. since the slider moves back and forth up and down the spyder it wears. as this slider wears on the inside, it begins to kick itself around at an angle. once the slider kicks itself around at an angle the slider wears extremely quickly against the tower of the clutch. with or without the stainless guides in place, once this slider kicks itself sideways, you have very little life left in it. the clutch doesnt work efficiently because of the friction between the slider and the tower of the clutch, which is what causes the slider to wear a deep groove into the tower of the clutch.
after working with almost all of the top desert race teams now, and having them constantly send me their clutches for inspection after every race, as well as working with many cross country teams back east as well as mud racers, we have been able to sort of "figure out" how long the clutch is going to last under each condition.
in desert racing, the sliders honestly last about 300 miles before they kick themselves sideways. around mile 400 they are getting super thin. around mile 500 they will wear out and kick themselves out of the clutch and you will end up with some metal on metal action.
in cross country racing or short course racing we find a substantial amount more miles are able to be raced on a single clutch. in cross country, since you are not at full throttle and high speeds all day, the clutches run substantially cooler and therefore tend to last a little longer. we have seen around 800-1000 miles on a single clutch before the parts needed to be replaced in a cross country machine that races in a 4 hour long endurance race.
the clutch wear can be prevented by replacing the sliders often. i know it sounds cheezy, and it is. the rest of the wear items in the clutch appear that they are well built and will easily last 1000 miles no problem at race pace. the rest of the clutch is superior to any other clutch polaris has ever ran. the downfall is these sliders and their design. the way the tower is encapsulated, it holds dirt and grit in there, the slider has to slide back and forth with sand and dirt between the slider and tower. it wears everything out so rapidly. the ABS plastic is so brittle and abrasive. the common consensus is to build a new slider out of a different material and i have thought of it. i want to, but i already know polaris is testing things, and i am hoping they come out with a better option before i sink another $15,000 into a part for this clutch and they end up changing the clutch later this year. they have already changed things about the clutch 3 times since i saw the first one last july. i am scared they will ditch the whole clutch for something else just as soon as i get a mold made to build a better slider that will last longer. i have been holding my cards hoping to see what hand Polaris plays to figure out whether to dive in and build more parts for the clutch. right now, on all our desert teams, we are replacing the sliders after every race. they are cheap. the sliders are like $13. i mean they are super cheap and easy to throw away after a race. the clutch is easily good for these shorter 300 mile races without too much worry. replace the sliders after a race and do another race. the stainless shims/guides from 3P are getting good reviews online, but it doesnt fix the problem of the slider wearing internally and kicking itself sideways and wearing itself out. the stainless guides keep the tower of the clutch from wearing out but it wont fix the slider wearing out. all of our desert teams we are pushing them to have at least one race clutch, and an identical back-up clutch. in the V2R i am sure almost all teams will replace the primary after the first day of racing. 300 miles on it and replace it with the back-up for the second day.
i know for the average joe out looking for a nice dune rig, you dont wanna have to keep spare clutches and have to rebuild the clutch after every single long weekend ride. i dont have a perfect solution for the clutch wearing out just yet. i do however have the best setup for racing, going fast, putting power to the ground, running the coolest belt temps you can get, and going the fastest. efficient and fast and powerful. thats what i can build. fixing the inherent problem with the stock clutch is rather hard to get around at this moment though.