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Old 04-02-2011, 09:42 PM   #1
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Default Is this clutch wear normal??

So this is the first time I've had the CVT cover off the Brute. I wanted to check deflection and got 1.34"?? Spec is .866"-1.063". New Belt width 1.19" new and 1.17" original take off belt when measured with caliper and 2 straight edges. Virtually no difference between new and used, maybe the uses is stretched a little causing deflection?? They are both Kawi belts too. The quad has about 750 miles on it, but is used a lot in Low range blowing snow in winter. I removed the clutch tonight and found what looks to be like grove mark were the belt sits near the bottom of the clutch. Is this normal or has the belt grooved the sheaves from using it a lot at walking speed moving snow?? I tried to take some photos but the camera kinda sucks. Let me know what you think??

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Old 04-03-2011, 05:09 AM   #2
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I beleive it is the KEBC that causes this wear, it keeps pressure on the clutch at low speeds.
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Old 04-03-2011, 05:14 AM   #3
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The wear is normal.
I hope you always use low range when plowing and going slow.
Make sure the belt is all the way to the top of the secondary clutch sheaves before measuring the deflection. With the trans in neutral and the belt installed, spin the secondary clutch at least 10-15 revolutions. It sometimes takes that long for the sheaves to fully close on the belt. The belt should end up 1/8-1/4 of an inch above the top of the sheaves if the deflection is good.
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Old 04-03-2011, 06:58 AM   #4
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Thanks for the replies fellas, I always use low range when blowing snow. I didn't rotate the drive the recommended amount 10-15 times maybe that's why the deflection is off?? I'm pretty sure the belt was level with top of secondary clutch, which I have read now is incorrect.The bike has started "bumping" just as I take off in high range (not when I mash the throttle just easy acceleration) . So I didn't know if this was normal and maybe the clutch was causing it. Here's a pic of what the Brute did all winter.
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Old 04-03-2011, 07:42 AM   #5
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Ouch! I didn't realize you were using a blower instead of plowing. That slow crawling speed will really heat up the clutch and wear the belt.
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Old 04-03-2011, 12:19 PM   #6
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So I went back out to the garage and put the new belt into the secondary clutch and basically sat flush to the top as well. I guess they put in alot of shims from factory?? Will have to pull the secondary and see whats up. I am considering doing a VFJ stage 3 on my clutch, but didn't know if it's worth it on a mainly stock quad. I know they work great on Modded bike but for a stocker don't know if it's worth the $$. Still sitting on the fence for this one. Ahhhhh decisions...............
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Old 04-03-2011, 12:37 PM   #7
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Quote: Originally Posted by digger2 View Post
I guess they put in alot of shims from factory?? Will have to pull the secondary and see whats up. I am considering doing a VFJ stage 3 on my clutch, but didn't know if it's worth it on a mainly stock quad. I know they work great on Modded bike but for a stocker don't know if it's worth the $$. Still sitting on the fence for this one. Ahhhhh decisions...............
Typically, no they don't.
John's mod is well worth doing to a stock machine, but MAKE SURE you tell him that you use a snow blower. It could be a cause for concern.
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Modded airbox
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Old 04-03-2011, 12:47 PM   #8
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If it were me and my belt was still within spec, I would just re-shim the secondary. Shims are not expensive and it's pretty easy to do if you have the tools and follow the service manual.
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Old 04-03-2011, 01:25 PM   #9
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Quote: Originally Posted by spinnin2win View Post
If it were me and my belt was still within spec, I would just re-shim the secondary. Shims are not expensive and it's pretty easy to do if you have the tools and follow the service manual.
If you want to "tighten" the belt, then you remove shims, not add them.
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FPS 12:1 pistons
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Crossover intakes
Modded airbox
Full Muzzy
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2011 Stratos 186XT Bass Boat
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Minn Kota 70lb 24v trolling motor
Lowrance Electronics
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Old 04-04-2011, 04:13 AM   #10
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NovaKaw650...You're correct in saying "if you want to tighten the belt, then you remove shims, not add them". However, by removing one, you may not achieve the desired deflection, e.g. mine had a .024 and .039 in it for a total of .063. To achieve the proper deflection I needed to be at .051 which isn't achievable by removing one of the two shims that were in it. It was achievable by purchasing a .012 shim (Part#92026-0034).
The service manual shows a total of 6 shims available, they are .012, .024, .032, .039 and .055.
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