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Primary collar

843 Views 32 Replies 9 Participants Last post by  Desertdweller67
I am into my 1600 mile service on my primary and secondary. I was very careful to lay various parts out on my bench so that I would know exactly how to put it all back together.
Except for the primary collar (pic). Which way does the smaller diameter of the inside of the collar point to?
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It doesn't really matter. I mean there are wear patterns that were made when it was originally installed, but that's not really going to matter if you install it 'backwards' from how it was originally installed.
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Thanks.
Your videos are guiding me through.
I got shims from UTV Engineering.
I am not sure where they go. Or is it a good idea to use them?
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Thanks.
Your videos are guiding me through.
I got shims from UTV Engineering.
I am not sure where they go. Or is it a good idea to use them?
Shims basically shift your power from up high to down low. By adding a shim you'll gain more low end grunt, but you'll lose max top speed. Shim can go between the collar and fixed sheave or between the collar and cam plate with the latter being preferred.
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Kman23, just as a FYI, if you use both .5mm shims you will only lose 5mph off your top end. If you don’t drive over 65 mph it won’t mean anything but the low end performance will be very valuable if you do slow moving through rocks, haul heavy loads or pull anything!
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Thanks Budro2. I never go that fast. I stopped that craziness when I sold the RZR and got the superior RMAX4.
I ride slower and do some crawling. I am going to go with both shims.
Great info.
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I just did my own, and I used two .5 shims. I put one on each side of that collar. On mine, I had trouble getting a shim thru the sheave, but finally went thru. There are just a little bit of splines showing under the cam plate, but I believe its enough.
I just did my own, and I used two .5 shims. I put one on each side of that collar. On mine, I had trouble getting a shim thru the sheave, but finally went thru. There are just a little bit of splines showing under the cam plate, but I believe its enough.
Next time you service, put both on behind the collar. Those shims don’t fit the shaft precisely so it’s hanging down and not centered with the hole. You could damage the seal.
My shims fit exact so I don’t have that issue using them on the outside.
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Next time you service, put both on behind the collar. Those shims don’t fit the shaft precisely so it’s hanging down and not centered with the hole. You could damage the seal.
My shims fit exact so I don’t have that issue using them on the outside.
Yeah, I will do that, thanks for the idea.
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Followup: thanks for the help and suggestions. Everything went back together smoothly and the performance is definitely improved. Very happy with it.
I added UTV Engineering: 22g weights (greaseless), shims (1 mm), slippery washers, clutch sliders, and Tinkseal.
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I went on a 25 mile ride this evening. Twice in low and once in high I got some "belt bark" when I pulled out from a stop. Level ground.
Thoughts?
I went on a 25 mile ride this evening. Twice in low and once in high I got some "belt bark" when I pulled out from a stop. Level ground.
Thoughts?
Any chance you installed the sliders upside down?
The sheaves are not returning to the lowest ratio upon stopping which leaves a slight bit of slack in the belt until movement begins again. It can be a problem with dust accumulation when running greaseless. Historically greaseless has not worked for me but never at 25 miles into initial service. After the barks began and it was blown out clean, I could get them in 25 miles or an hour of riding dry dusty trails. That’s why I wonder about the sliders. If they are installed incorrectly they can’t move back to the lowest ratio the way they should. They will hang up.
Otherwise you must be riding some serious dusty trails?
Any chance you installed the sliders upside down?
No. I was very careful, watching Massive Overkill's videos during each step. Made sure the "I" faced the correct way, toward the inside.
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Greaseless causes belt bark, for me anyways.
Try stopping slower, no fast stops or you will/can get belt bark.
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No. I was very careful, watching Massive Overkill's videos during each step. Made sure the "I" faced the correct way, toward the inside.
🤷‍♂️ Maybe MO or Tinken will have an idea. Are they the latest sliders developed?
Not knocking it, plenty of happy people without problems but after multiple attempts on two different machines I’m over it. Even when freshly serviced and no dust I’d get barks after rolling backwards off steep climbs I didn’t make and when going forward and back in deep snow.
The sliders have been advanced since my last attempt but I’m to gun shy at this point.
My personal opinion will remain that it’s intended to have grease to be 100% trouble free.
I went on a 25 mile ride this evening. Twice in low and once in high I got some "belt bark" when I pulled out from a stop. Level ground.
Thoughts?
When you installed the cam plate sliders, did you use the provided tool to install and make sure they were fully-seated and make sure the line or I faced the inside of the cam plate/sheave? Did you slide the cam plate in and out by hand to make sure it moved freely?
Yep. I used the tool, they were fully seated, the line faced the inside, and the cam plate moved slippery smooth.
I am super OCD.
The shims are between the collar and the fixed sheave.
As far as ut being dusty. I rode alone (other than my GSD) so I wasn't sucking in dust.
I don't really want to go back to the stock setup, the new performance is so much better. I hope I can track down the issue.
I have several hundred miles of riding planned this weekend, I hope it does ok.
Yep. I used the tool, they were fully seated, the line faced the inside, and the cam plate moved slippery smooth.
I am super OCD.
The shims are between the collar and the fixed sheave.
As far as ut being dusty. I rode alone (other than my GSD) so I wasn't sucking in dust.
I don't really want to go back to the stock setup, the new performance is so much better. I hope I can track down the issue.
I have several hundred miles of riding planned this weekend, I hope it does ok.
As far as sucking up dust, “IF” it is a dust issue, you don’t have to be following anyone.
I don’t ride with anyone, and dust has been a problem for me.
The bark is really quite harmless, just annoying. The down side to the problem is, is that if it’s barking, it’s not in the lowest ratio on take off so it feels gutless. It defeats the purpose of shimming and is worse on take off than stock performance. My experience is that if it barks occasionally, there are countless other times it doesn’t bark but the starting ratio is like being stuck in high gear. I can feel it and I’ve watched it play out over and over with covers off. Not enough slack to bark but the belt recessed down in the secondary at take off.
The shims and shim placement have nothing to do with the issue.
I would just drive it and see if it gets better or worse. If it’s worse get it out in the open and drive it fast. That helps expel the dust.
Bear in mind all the things you did that improved performance can still be had while putting grease in it. You keep the performance and get rid of the problem. You don’t have to go back to stock!
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Maybe it wasn't fully engaged when you went to to take off.
Just random thinking: I wonder how many RMAX owners who have belt bark are using shims and how many aren't.
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