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post #1 of 36 (permalink) Old 08-24-2008, 12:58 PM Thread Starter
 
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Belt/sheave wear question

Hey guys, I've got a '07 660, with about 85hrs and a touch over 900miles on it. I noticed recently that my top speed now has dropped from 41mph when it was new, to about 38-39mph now (bouncing off the rev limiter).

I took the belt and sheave apart to check it out, and I'm seeing some minor wear in the sheave surface (maybe 1/32 in.) in spots. The belt looks to be in good shape.

Is the sheave wear anything to be concerned about? And is there a spec to measure to tell if the belt is worn?

The drive is all stock, no modified sheaves or duner's kits.
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post #2 of 36 (permalink) Old 08-24-2008, 01:05 PM
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I remember seeing a spec on the width of the belt...maybe in the manual....You can measure it with calipers once you find the spec.



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post #3 of 36 (permalink) Old 08-24-2008, 01:18 PM
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My guess is that you are running a CVT Filter and the heat has caused a little premature belt wear. I dont remember the exact specs on the belt but I will look around. Use a scotch brite pad to scuff up the surface of the sheave. Then buy an OEM Belt for around $75.00. Put the new belt in and you will be good. Take the old belt and zip tie it to the fram under the hood. It will always be there in case of an emergency.

2006 Rhino 660
BRP Stage 2 CDI
UTVCrap Sheave
4 Seat Cage w/42" Rear PRP Seat
ITP T-7C Wheels (5+2 front offset & 2+5 Rear)
Big Horn Tires (25x8x12 & 25x10x12)
LSR MTS +3 Mid Travel Kit
Bilstein Shocks w/ Eibach Springs 250lb front & 400lb rear
http://i105.photobucket.com/albums/m...BRP_Avatar.jpg http://i105.photobucket.com/albums/m...avatar/byc.jpg http://i105.photobucket.com/albums/m...r/uutv1211.jpg
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post #4 of 36 (permalink) Old 08-24-2008, 01:51 PM
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Quote:
Originally Posted by mikef View Post
My guess is that you are running a CVT Filter and the heat has caused a little premature belt wear. I dont remember the exact specs on the belt but I will look around. Use a scotch brite pad to scuff up the surface of the sheave. Then buy an OEM Belt for around $75.00. Put the new belt in and you will be good. Take the old belt and zip tie it to the fram under the hood. It will always be there in case of an emergency.
great advise, you do this and you will be golden!

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post #5 of 36 (permalink) Old 08-24-2008, 05:00 PM Thread Starter
 
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Cool, thanks guys! I couldn't find the specs, so I'll give the belt swap a shot.
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post #6 of 36 (permalink) Old 08-24-2008, 06:20 PM
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I've lost a few MPH myself,from 60-61 to 57-58. I am right about 1000 miles but I only used a cvt filter for the first couple hundred miles. The filter got dirty so fast I fiqured it was doing more harm than good. I am planning on looking at the sheave and belt this week.
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post #7 of 36 (permalink) Old 08-24-2008, 06:37 PM
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I've lost a few MPH myself,from 60-61 to 57-58. I am right about 1000 miles but I only used a cvt filter for the first couple hundred miles. The filter got dirty so fast I fiqured it was doing more harm than good. I am planning on looking at the sheave and belt this week.

Smart man.....

IMO the CVT Filter does more harm than good. The added heat will do far more damage than the dirt will. I ghad 2000 miles on my first belt and it still looked new when I repalced it. I have over 3500 miles on my Rhino, no CVT Filter and no problems with my CVT.

2006 Rhino 660
BRP Stage 2 CDI
UTVCrap Sheave
4 Seat Cage w/42" Rear PRP Seat
ITP T-7C Wheels (5+2 front offset & 2+5 Rear)
Big Horn Tires (25x8x12 & 25x10x12)
LSR MTS +3 Mid Travel Kit
Bilstein Shocks w/ Eibach Springs 250lb front & 400lb rear
http://i105.photobucket.com/albums/m...BRP_Avatar.jpg http://i105.photobucket.com/albums/m...avatar/byc.jpg http://i105.photobucket.com/albums/m...r/uutv1211.jpg
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post #8 of 36 (permalink) Old 08-24-2008, 06:38 PM
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Originally Posted by nicholsej View Post
Cool, thanks guys! I couldn't find the specs, so I'll give the belt swap a shot.
Meaure your belt width with some calipers. Per the Yamaha spec if it is 1.2" or less it needs to be replaced.

2006 Rhino 660
BRP Stage 2 CDI
UTVCrap Sheave
4 Seat Cage w/42" Rear PRP Seat
ITP T-7C Wheels (5+2 front offset & 2+5 Rear)
Big Horn Tires (25x8x12 & 25x10x12)
LSR MTS +3 Mid Travel Kit
Bilstein Shocks w/ Eibach Springs 250lb front & 400lb rear
http://i105.photobucket.com/albums/m...BRP_Avatar.jpg http://i105.photobucket.com/albums/m...avatar/byc.jpg http://i105.photobucket.com/albums/m...r/uutv1211.jpg
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post #9 of 36 (permalink) Old 08-24-2008, 06:43 PM
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A buddy of mine has 4000 on his stock belt, granted he doesn't ride as hard as most of us though
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post #10 of 36 (permalink) Old 08-24-2008, 07:28 PM Thread Starter
 
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Originally Posted by mikef View Post
Meaure your belt width with some calipers. Per the Yamaha spec if it is 1.2" or less it needs to be replaced.
Cool, thanks for the spec, I just checked it and I'm at the minimum.

I have no CVT filter on it, figured it might last longer than it did, but it's had a hard life, probly 800 of those 900 miles have been in the sand, and 799 of those 800 have been at WOT.
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