Blown belts?

[Bigblue1]

Not all
My belts have snapped , 2 did though.

All the rest grenaded and got rope all tangled in the secondary, and did I mention it was below -20 the last time.

Ditto. I blew a belt at 400 miles, very cognizant of how to roll in throttle on a high hp sled. Rolled in power came on and belt snapped in several places. Replaced secondary rollers and belt blew disintegrated on a hard pull. Shattered. It took 30 minutes trail side to clean out all the pieces. Checked primary and on of the roller bushings was not seated properly. The sled then ran as advertised silky smooth with great power. I ended up with 1900 miles but toward the end I could feel belt getting rough again. I intend to flash and put in a clutch kit with the thunder spring this year but we'll see. My Apex with ad ons can be driven anyway I want and the belt goes well over three thousand miles. I just replace to have a new belt in it not due to failure. I have a stack of used 8dns. A bit frustrating to say the least.

 

[stevewithOCD]

Stack-O-Belts....me too. I put a new one on to begin each year on my Ape. I then put a little piece of tape with mileage on it for future use. I should put them on E-bay...they all look perfect

 

[ROCKERDAN]

Yeah same here, my apex would never blow one. Just changed for heck of it.lol

Its too bad the yammie legendary belt life was lost on this Yamacat. Im not sure if this was same on Vipers, but if it was fine with vipers then it sure seems that it must be a roller secondary thing. Just hope we all figure it out. Sucks but the cats now have better belt life, and also cat seems to be fixing clutch issues, where as the 18 SW got ZERO clutch changes apparently.

Dan

 

[SuperTurbo]

At season end 1300 miles I had the same amounts of belts 2 snaps 3 explodes, did all the suggested fixes for stock.
Purchased STM secondary still exploded 2 belts even put a Apex primary on still boom, purchased STM 4 post primary, boom.. interchanged them all for every combo no success.
Here in Ohio we had no snow for testing usually the lake bay freezes over but not this time. So I
contacted Ulmer about my issues he had me send STM's to him to put on the chassis dyno for my fix, he said he has the primary dialed in and a helix and spring away for the secondary
I know this doesn't help the stock problem but thought I share my experience.

Also I used a very expensive digitizer to check chassis to motor measurements horizontal/ vertical chassis to clutches/motor etc, it all checked pretty dam good. Not like my Z1Turbo...

 

[ROCKERDAN]

Wow, that sucks....hard to imagine all those diff setups all still blowing....Grrrrr

 

[SuperTurbo]

Wow, that sucks....hard to imagine all those diff setups all still blowing....Grrrrr

I only had ride time with the fellas to check things and we all know that is never ideal. I do feel the stocks are capable if anyone can figure it out you and your resources can Dan.
I just didnt have the weather or time.

 

[stevewithOCD]

The AC clutches run hot, so when we do figure this out, we'll be better off....or buying Thundercats

 

[ROCKERDAN]

I only had ride time with the fellas to check things and we all know that is never ideal. I do feel the stocks are capable if anyone can figure it out you and your resources can Dan.
I just didnt have the weather or time.

Did you always run 8jp?

Ever try a Gates CC?

I know back on the procross, with all the belt issues Cat came out with a tougher belt, and it cost a pretty penny. But it does beg the question, are these belts such as 8jp or 8dn that were designed originally much less Hp sleds, tough enough for 200++?

Dan

 

[**sj**]

not suggesting this is the cause of yours or anyone's failures...but two thinks to look out for besides the many things mentioned..the airbox filter oil dripped on clutches and belts....also...the belly pans don't seal well and let snow and water in....neither is good for clutches or belts...

 

[Bigbluemachine]

not suggesting this is the cause of yours or anyone's failures...but two thinks to look out for besides the many things mentioned..the airbox filter oil dripped on clutches and belts....also...the belly pans don't seal well and let snow and water in....neither is good for clutches or belts...

No. Due to this forum giving a heads up, I removed the airbox and washed the excess oil( there was a lot) before putting a single mile on the sled.

 

[SuperTurbo]

Did you always run 8jp?

Ever try a Gates CC?

I know back on the procross, with all the belt issues Cat came out with a tougher belt, and it cost a pretty penny. But it does beg the question, are these belts such as 8jp or 8dn that were designed originally much less Hp sleds, tough enough for 200++?

Dan

8j's first then 8dn's then the Gates tried them all, I just don't get it?? when we built our RX1's and Apex Turbo's never had this always used the 8dn's broke one belt between the two turbo builds.

 

[ROCKERDAN]

8j's first then 8dn's then the Gates tried them all, I just don't get it?? when we built our RX1's and Apex Turbo's never had this always used the 8dn's broke one belt between the two turbo builds.

Make you wonder if these chassies have too much flex or something? I know this engine is mounted more solidly then that crazy 12 procross setup with that TCL ect....but could it be flexing, taking the clutches out of aligment when under all the torque, that we just cannot see when sled is on a stand?

I like trying to figure things out, but man o man...when belts keep blowing and nothing stands out, it sure does suck. And was one of the MAIN reasons I got rid of that cat. Just never knew when A belt would go.

Dan

 

[Joe ltx-le]

Make you wonder if these chassies have too much flex or something? I know this engine is mounted more solidly then that crazy 12 procross setup with that TCL ect....but could it be flexing, taking the clutches out of aligment when under all the torque, that we just cannot see when sled is on a stand?

I like trying to figure things out, but man o man...when belts keep blowing and nothing stands out, it sure does suck. And was one of the MAIN reasons I got rid of that cat. Just never knew when A belt would go.

Dan

I was wondering the same thing. Is the problem beyond the clutches ?

My sleds at the dealer. 1 year warranty is coming to a close and I don't want to be blowing belts all winter.again

 

[ROCKERDAN]

I was wondering the same thing. Is the problem beyond the clutches ?

My sleds at the dealer. 1 year warranty is coming to a close and I don't want to be blowing belts all winter.again

I know we all keep finding things, and we think that is the cure. First it was the rollers in secondary, then it was secondary coil bind, then it was the primary spring breaking or coil binding. I think that covers all the things we thought we could fix easily.

The odd thing is on the 12 procross, we all assumed it was the TCL along with the soft mounting of engine, where it all moved together with those axial bearings in chaincase.

But Im pretty sure the procross slowly got to a decent belt life over a few seasons. And by 16 wasnt the belt life on the cat pretty good? And it still had the tcl and same engine mounting I assume in 16 as 12.

Most yammie enthusiasts like myself, assumed SW with Yam clutches was gonna be the ticket, and likely why SW outsold CAT 9000 for 17MY. But then the opposite seemed to happen and the Cat belt life seemed better. Although the raw amount of SW out on the snow was likely alot more then 9000 cat 998s last yr. So who really knows. At least cat is recalling their clutch issues, and that is important. Yam does not seem to do much at all with updates to clutches. So we may be on our own to figure this out.

That is one thing I like about BRP...while they all have their issues, BRP seems like they will address any flaws and correct them. Yammie never had belt life issues before, so they may just not even know how to fix them.

 

[Joe ltx-le]

I know we all keep finding things, and we think that is the cure. First it was the rollers in secondary, then it was secondary coil bind, then it was the primary spring breaking or coil binding. I think that covers all the things we thought we could fix easily.

The odd thing is on the 12 procross, we all assumed it was the TCL along with the soft mounting of engine, where it all moved together with those axial bearings in chaincase.

But Im pretty sure the procross slowly got to a decent belt life over a few seasons. And by 16 wasnt the belt life on the cat pretty good? And it still had the tcl and same engine mounting I assume in 16 as 12.

Most yammie enthusiasts like myself, assumed SW with Yam clutches was gonna be the ticket, and likely why SW outsold CAT 9000 for 17MY. But then the opposite seemed to happen and the Cat belt life seemed better. Although the raw amount of SW out on the snow was likely alot more then 9000 cat 998s last yr. So who really knows. At least cat is recalling their clutch issues, and that is important. Yam does not seem to do much at all with updates to clutches. So we may be on our own to figure this out.

That is one thing I like about BRP...while they all have their issues, BRP seems like they will address any flaws and correct them. Yammie never had belt life issues before, so they may just not even know how to fix them.

Yamaha still says the sidewinder doesn't have belt issues. It's "operator" error they claim. I was told to warm the belt up slow when it's cold.

I do that and still blow belts.

My 16 viper with mpi turbo did not eat belts i only blew one in 5000 miles and it was a big old pull when it blew. That sled had the same power as a sidewinder.