Ltx se blowing belts

[ClutchMaster]

The three bolts at the bottom of the jackshaft mount can be drilled out larger, I replaced two of them with 1/4-28 fine thread bolts for better clamping force so they don’t move. After drilling they allow the jackshaft to be moved backward or forward for more or less center to center and a slight change in parallel.

 

[ClutchMaster]

Alignment is always pointed to, but rarely as big an issue. The 1100 turbo cats had actual tied clutches and blew belts like crazy due to junk clutches. In fact decoupling the clutches with the yamaha motor has been a help for belt life. The mounts with these yamacats are really robust from the factory...that's why you don't see a lot of aftermarket products aimed at fixing a problem here.

No offense TCat you are a wealth of knowledge!!!
I’ve worked on more older cats with belt issues than Winders and have found every one that I worked on to be alignment issues. The TCL delete is a bad idea. Every sled was cured with the OSP alignment tool. The TCL tie bar works great as long as the clutches are straight.
A sled that has the tie bar and .060” tilt forward front to back on the primary clutch will blow belts just cruising down the trail. Remove the TCL and now under power the problem seems to get better. Remove the TCL on a Cat with straight clutches and it will blow belts. Folks can’t believe that being out as much as a spark plug gap will blow belts but it will.
Haven’t seen a true race sled yet that doesn’t have a clutch tie system of sorts yet, wonder why?
Big tunes move your motor around 4 sure.

 

[DMCTurbo]

HAHA, I have been running vents enough up front to feed a jet turbine and even mounted a fan for this year. Heat does not seem to be the issue, just blown and corded belts on the tunes at 270 and up.

I've gone back to the old Yamaha clutches to start this season and set the newer POS Winder primary & roller secondary on the bench. Hopeful that this will be the season to get it in check finally.

I'm interested in this as well. Looking forward to hearing all about it. Thanks.

DMC

 

[Big_Phil]

Alignment is always pointed to, but rarely as big an issue. The 1100 turbo cats had actual tied clutches and blew belts like crazy due to junk clutches. In fact decoupling the clutches with the yamaha motor has been a help for belt life. The mounts with these yamacats are really robust from the factory...that's why you don't see a lot of aftermarket products aimed at fixing a problem here.

My buddy has 2 2012 cat 1100s with stock cluches, you would be surprised how well they work. Better belt life than a sidewinder and they run the same speed as a sidewinder pump gas vs pump gas (he has meth injection so runs 22psi on the trail). We did some testing on our lake last year, stock cat clutches vs STM 3vl and speeds were the same. Used at TD GPS so our results are accurate as can be.

 

[snowbeast]

Buying an expensive primary and secondary clutch isn’t the answer to your belt blowing problems. Yes they are more reliable but sleds with 400hp have run the apex primary, no issues.
Secondary clutch dictates belt tension period.
Roller clutches are extremely prone to overshift on the big end, leading to slippage. You need to have perfect alignment under full power at full shift. The mounts are rubber and do flex some. Bigger tunes flex you engine more and require more offset and forward engine tilt like the old days. Best Scenario is a clutch tie or motor snubber so clutches maintain straightness under all power situations. Modified clutch setups will help for some alignment issues but can only go so far.

Hi clutchmaster,is this why you now are saying 32 degree finish angle is better than stock 35?

 

[ClutchMaster]

Hi clutchmaster,is this why you now are saying 32 degree finish angle is better than stock 35?

Yes if your having issues with high heat and blowing belts @ full shift a lower finish helix angle can be beneficial at helping maintain belt squeeze. I don’t think all winders need this low of an angle, just the ones blowing belts at high speeds. It’s a better option than running a heavy secondary spring.

 

[Sledbrapping88]

Yes if your having issues with high heat and blowing belts @ full shift a lower finish helix angle can be beneficial at helping maintain belt squeeze. I don’t think all winders need this low of an angle, just the ones blowing belts at high speeds. It’s a better option than running a heavy secondary spring.

So my alignment was just checked at hurricane done by dave himself it was dead on with his tool had to put new rollers in secondary 1 of the rollers had a flat chunk missing. Would the roller and slightly loose belt blow 2 belts in 60 miles just curious because haven't been able to open up since I've got the sm tune bundle and was wondering if the lower finished angle would cure this. I'm running dtay 1 at 78.5g blk/orange secondary spring stock primary spring 2018

 

[Sledbrapping88]

Also my sled wasn't a belt blower blew 1 belt in 650 miles stock

 

[ClutchMaster]

Also my sled wasn't a belt blower blew 1 belt in 650 miles stock

That’s crappy belt life for a stock machine.

So my alignment was just checked at hurricane done by dave himself it was dead on with his tool had to put new rollers in secondary 1 of the rollers had a flat chunk missing. Would the roller and slightly loose belt blow 2 belts in 60 miles just curious because haven't been able to open up since I've got the sm tune bundle and was wondering if the lower finished angle would cure this. I'm running dtay 1 at 78.5g blk/orange secondary spring stock primary spring 2018

If Dave says it’s good, why are you so worried?
Oh yea check your clutch rollers every day.

 

[Sledbrapping88]

Well I had the alignment and everything done and checked over just before I blew 2 belts in 60 miles also done at dave shop

 

[Sledbrapping88]

Not saying anything dave done just wanted your opinion as you seem to know your clutching

 

[snowbeast]

Not saying anything dave done just wanted your opinion as you seem to know your clutching

Which belt? Stock 8jp?

 

[snowbeast]

Yes if your having issues with high heat and blowing belts @ full shift a lower finish helix angle can be beneficial at helping maintain belt squeeze. I don’t think all winders need this low of an angle, just the ones blowing belts at high speeds. It’s a better option than running a heavy secondary spring.

Thanks CM.

 

[Sledbrapping88]

Which belt? Stock 8jp?

Gates and 8jp

 

[ClutchMaster]

Well I had the alignment and everything done and checked over just before I blew 2 belts in 60 miles also done at dave shop

I wouldn’t worry, you had bad rollers, that can definitely cause you to blow belts. Although if you still are blowing belts then I would switch to the XS belt, sticks better when warm.