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post #1 of 21 (permalink) Old 09-13-2011, 07:09 PM Thread Starter
 
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Belt problems

From reading other posts I am thinking that one of the first things to check on your Redline is the belt alignment. Even if the engine has not been removed it seems like they can move some causing severe damage with a belt failure. The other thing would be everyone should fabricate a metal belt guard to help contain the explosion. The factory plastic guard is not enough! And if you have a failure the first thing after gaining control of the car would be to shut off the engine to lesson the damage. It seems like there has been a rash of failures recently so lets be safe out there!
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post #2 of 21 (permalink) Old 09-13-2011, 11:32 PM
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Re: Belt problems

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Originally Posted by Pilot View Post
From reading other posts I am thinking that one of the first things to check on your Redline is the belt alignment. Even if the engine has not been removed it seems like they can move some causing severe damage with a belt failure. The other thing would be everyone should fabricate a metal belt guard to help contain the explosion. The factory plastic guard is not enough! And if you have a failure the first thing after gaining control of the car would be to shut off the engine to lesson the damage. It seems like there has been a rash of failures recently so lets be safe out there!
Dave you bring up a good point. These engines move alot of oil and at the rpm we run. It doesn't take long to pump 3 qrts out of the engine and on the ground if you rip a cooler or engine supply oil line or knock a hole in the oil tank.

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post #3 of 21 (permalink) Old 09-14-2011, 05:55 AM
 
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Re: Belt problems

With my recent misfortune blowing a belt I dont think it was an alignment issue, I have the Redline alignment tools & I'm anal with keeping it adjusted to factory specs. To have the clutches Aligned correctly my engine has to sit slightly crooked on the engine mounts, pushed to the generator side at the rear when tightening rear engine mounts. Also removed 2 spacers from the secondary clutch. Makes it tricky to get the measument between clutches spot on but its acheivable with persistance. I wonder how much the alighnment is out under full acceleration when the engine is twisting on the engine mounts !
Before this belt exploded it was slightly worn on the top left half as though it had been catching/rubbing on a clutch cover wing nut prior to the turbo upgrade. I cut the wing nuts down to gain a little more clearance but it appears not enuff. When the belt let go I had the throttle wide open reving at 8300rpm & almost 15psi boost. Maybe the extra revs causes the belt to grow a little more out of the primary clutch allowing it to catch on 1 of the wing nuts.
This is the 2nd belt that has failed on me. The 1st belt failed at 200 mile, on this particular day we were on a motorcross track constantly jumping & on & off the gas alot, I probably did 100 jumps non stop before it let go, the shocks were to hot to touch. Anyways this recent belt that blew has done over 600 miles although has not had a jumping workout like the 1st belt did on that particular day.
Totally agree with a steel belt guard. Thats on the top of my list to fabricate prior to another ride!


Last edited by Mick; 09-14-2011 at 04:57 PM.
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post #4 of 21 (permalink) Old 09-14-2011, 05:58 AM
 
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Re: Belt problems

If you look closely at this photo at the white print on the belt you can see where it was worn on 1 half !
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post #5 of 21 (permalink) Old 09-14-2011, 11:45 AM
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Re: Belt problems

Excellent thread. These engines tilt back and twist to the right under high torque. I have only blown two belts and both happened under top speed pinned situations. I have never gotten the 12 1/4" alignment on either of my Redlines. I wonder if my belt is just a tad short under top speed? Any thoughts?
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post #6 of 21 (permalink) Old 09-14-2011, 02:22 PM
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Re: Belt problems

I think it's a 12" c to c.
Mick, check to see if your secondary moveable shive is hitting the frame rail that supports the tranny. We had to mod. the frame rail on the Riot.
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post #7 of 21 (permalink) Old 09-14-2011, 03:27 PM
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Re: Belt problems

TRS, you are right it is 12". I meant to say that neither my Riot nor Revolt XL would get closer than 12 and a 1/4".
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post #8 of 21 (permalink) Old 09-14-2011, 05:07 PM
 
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Re: Belt problems

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Originally Posted by TRS View Post
I think it's a 12" c to c.
Mick, check to see if your secondary moveable shive is hitting the frame rail that supports the tranny. We had to mod. the frame rail on the Riot.
TRS it dosnt come close.
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post #9 of 21 (permalink) Old 09-14-2011, 05:07 PM Thread Starter
 
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Re: Belt problems

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Originally Posted by Mick View Post
With my recent misfortune blowing a belt I dont think think it was an alignment issue, I have the Redline alignment tools & I'm anal with keeping it adjusted to factory specs. To have the clutches Aligned correctly my engine has to sit slightly crooked on the engine mounts, pushed to the generator side at the rear when tightening rear engine mounts. Also removed 2 spacers from the secondary clutch. Makes it tricky to get the measument between clutches spot on but its acheivable with persistance. I wonder how much the alighnment is out under full acceleration when the engine is twisting on the engine mounts !
Before this belt exploded it was slightly worn on the top left half as though it had been catching/rubbing on a clutch cover wing nut prior to the turbo upgrade. I cut the wing nuts down to gain a little more clearance but it appears not enuff. When the belt let go I had the throttle wide open reving at 8300rpm & almost 15psi boost. Maybe the extra revs causes the belt to grow a little more out of the primary clutch allowing it to catch on 1 of the wing nuts.
This is the 2nd belt that has failed on me. The 1st belt failed at 200 mile, on this particular day we were on a motorcross track constantly jumping & on & off the gas alot, I probably did 100 jumps non stop before it let go, the shocks were to hot to touch. Anyways this recent belt that blew has done over 600 miles although has not had a jumping workout like the 1st belt did on that particular day.
Totally agree with a steel belt guard. Thats on the top of my list to fabricate prior to another ride!

Mick, I used the stock top mounting bracket to mount my 6061 aluminum guard to and the belt was rubbing on the rear bolt that I used to hold the 6" wide guard to it. I ended up modifying and moved it up 1" higher to gain enough clearance. It also needed some thicker steel added with a gusset. The 6" wide by 3/16" thick piece is 22" long. The other steel mount is bolted to the front lower motor mount bolt on the side. Its wide enough to protect the oil tank and oil lines and cooler. I don't know for sure since luckily I haven't blown a belt yet. We'll see.
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post #10 of 21 (permalink) Old 09-14-2011, 05:23 PM
 
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Re: Belt problems

Great info Dave. Is there any chance you can get Scott to send me a photo of your set-up ? I need to come up with a belt guard that encloses the clutches like the stock plastic item. We often ride in wet muddy conditions & our trails have lots of small rocks & stones, NOT clutch friendly. I was hoping I could line the inside of the stock guard where the belt runs with steel or ally but clearance issues have knocked that idea on the head. I figure need to fabricate a complete new guard out of ally or stainless that is slightly larger than stock & modify the mounting brackets to suit.
Nothings ever easy !!!
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