"belt slap" - Polaris RZR Forum - RZR Forums.net
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post #1 of 24 Old July 29th, 2019, 04:25 PM Thread Starter
 
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"belt slap"

I asked this question in the forums about a rubbing sound when at slow speed down an incline using the motor for breaking or a steady speed. The group said it was belt slap, meaning the belt is rubbing on the casing.

I have a totally stock 2019, with around 220 miles on it and it did it from the start. I'm took a lot of care to break in the belt and use low when trail riding.

I have yet to remove the cover and look at it.

Is this a defect that I should take back to the dealer for or a known design flaw? how can I fix it? Different belt? white washer?


Thanks in advance.
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post #2 of 24 Old July 29th, 2019, 05:20 PM
 
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Re: "belt slap"

Have a 2019 XPT does the exact same thing. My dealer told me it was a completely normal sound.
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post #3 of 24 Old July 29th, 2019, 05:33 PM
 
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Re: "belt slap"

2018 XP here, Same sound as you. 620 miles. Sounds like a tire drag lock up sound either on decel going down a loose hill or sudden deceleration off the gas fast. Took my cover off and saw and felt where it rubs. bought a new belt and compared it and the used belt looks stretched. Also, there is glazing, especially along the inside edge. think it is running too low in the secondary. I bought Hunterworks secondary rollers to exchange out the square pucks AND Hunterworks primary washer to limit the travel of the belt in the secondary. Got to put it all back together yet.

Also, i scuffed up and cleaned the primary sheaves and will be putting on and breaking in a new belt. Is it normal? Potentially, but I didn't like the sound and my belt looked like it was being overheated so I am trying some simple things.
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post #4 of 24 Old July 29th, 2019, 05:53 PM
 
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Re: "belt slap"

Watch how the belt bows out or deflects when lifting the throttle...
https://www.instagram.com/p/BzB_Vfmh..._web_copy_link

That's what's happening behind your cover, but under a load it has more force or "belt slap".
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post #5 of 24 Old July 30th, 2019, 05:08 AM
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Re: "belt slap"

Quote:
Originally Posted by Fuzzy761210 View Post
I asked this question in the forums about a rubbing sound when at slow speed down an incline using the motor for breaking or a steady speed. The group said it was belt slap, meaning the belt is rubbing on the casing.

I have a totally stock 2019, with around 220 miles on it and it did it from the start. I'm took a lot of care to break in the belt and use low when trail riding.

I have yet to remove the cover and look at it.

Is this a defect that I should take back to the dealer for or a known design flaw? how can I fix it? Different belt? white washer?


Thanks in advance.
Always best to start by taking cover off and see what you see.

Round rollers to replace the square pucks will help as it is more efficient to return the clutch back closed quicker so that means faster backshift and tighter belt on deceleration

But take cover off and look above the belt in between clutches at back cover and see if you see rub marks
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post #6 of 24 Old August 24th, 2019, 04:02 PM Thread Starter
 
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Re: "belt slap"

Quote:
Originally Posted by Hunterworks View Post
Quote:
Originally Posted by Fuzzy761210 View Post
I asked this question in the forums about a rubbing sound when at slow speed down an incline using the motor for breaking or a steady speed. The group said it was belt slap, meaning the belt is rubbing on the casing.

I have a totally stock 2019, with around 220 miles on it and it did it from the start. I'm took a lot of care to break in the belt and use low when trail riding.

I have yet to remove the cover and look at it.

Is this a defect that I should take back to the dealer for or a known design flaw? how can I fix it? Different belt? white washer?


Thanks in advance.
Always best to start by taking cover off and see what you see.

Round rollers to replace the square pucks will help as it is more efficient to return the clutch back closed quicker so that means faster backshift and tighter belt on deceleration

But take cover off and look above the belt in between clutches at back cover and see if you see rub marks

Sorry for the delay, been busy with other things

Anyway here is some pictures

This is a couple of pictures of the belt rubbing the top of the plastic. its enough to make the plastic have some build up (burnt plastic) at the end of the scrape mark



There is a small amount of rub marks on the bottom of the cover but no where near the top side.



You can see the belt is clean on the top ribs from rubbing



What do you think?
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post #7 of 24 Old August 25th, 2019, 08:41 AM
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Re: "belt slap"

Pop-rivet a Teflon strip up there.

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post #8 of 24 Old August 25th, 2019, 11:17 AM
 
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Re: "belt slap"

My 17 does the same thing. Brought it back to dealer and they changed oth covers,still does it.

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post #9 of 24 Old August 25th, 2019, 12:01 PM
 
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Re: "belt slap"

Our 17 had the problem. Tore the top off the belt. Aligned the engine and trans shaft and fixed that and other clutch problems.

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post #10 of 24 Old August 25th, 2019, 01:39 PM Thread Starter
 
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Re: "belt slap"

I going to call the dealer on tuesday (closed on monday)

This issue and the fact mine also can't go over 62 mph, anything above 50 it just feels weak and barely gets to 62. Not that I would regularly go over 40-50 but I think this is another side effect of a bigger problem.

I Value hunterworks advice and would like to know as much as possible before I talk to the dealer, so they don't try to buffalo me and try and tell me everything is normal
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post #11 of 24 Old August 25th, 2019, 02:07 PM
 
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Quote:
Originally Posted by Fuzzy761210 View Post
I going to call the dealer on tuesday (closed on monday)

This issue and the fact mine also can't go over 62 mph, anything above 50 it just feels weak and barely gets to 62. Not that I would regularly go over 40-50 but I think this is another side effect of a bigger problem.


I Value hunterworks advice and would like to know as much as possible before I talk to the dealer, so they don't try to buffalo me and try and tell me everything is normal
Take your belt off and look for glazing, cuts etc. I bet your belt is glazed. This is exactly what was going on with mine. I changed out the belt, put the round rollers in and their white primary washer to prevent over travel and it’s like a new machine.
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post #12 of 24 Old August 26th, 2019, 04:35 AM
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Re: "belt slap"

Quote:
Originally Posted by Fuzzy761210 View Post
I going to call the dealer on tuesday (closed on monday)

This issue and the fact mine also can't go over 62 mph, anything above 50 it just feels weak and barely gets to 62. Not that I would regularly go over 40-50 but I think this is another side effect of a bigger problem.

I Value hunterworks advice and would like to know as much as possible before I talk to the dealer, so they don't try to buffalo me and try and tell me everything is normal
I would suspect shaft spacing is off, the two clutches too close together. Either that or secondary not closing up fast enough

This answer was about the belt hitting, the not hitting barely 62, hitting limiter or out of power?

Todd

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post #13 of 24 Old August 26th, 2019, 05:14 AM Thread Starter
 
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I only add the comment about the mph thing is because it had me thinking, at the time I didnt think they were related but they might be. Just asking, trying to get my learn on

I doesnt hit the limiter, It just runs out of steam up top.
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post #14 of 24 Old August 26th, 2019, 06:49 AM
 
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Re: "belt slap"

Todd they checked the spacing and its right on. They replaced all the springs and covers still does it.

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post #15 of 24 Old August 26th, 2019, 07:12 AM
 
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Re: "belt slap"

Quote:
Originally Posted by roadiestar View Post
Todd they checked the spacing and its right on. They replaced all the springs and covers still does it.
There is more than one way to check the shaft spacing. One way does not find an alignment problem, only spacing. Alignment is the key. How did they do it? By measuring or??

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