Primary clutch exploded

[ROCKERDAN]

Dan I’m not sure where your getting your information that STM clutches aren’t doing well?
You can get the 3 arm tied tower clutch for $1075 empty, take your yamaha weights and throw them in, or any other weights you wish to run for that matter. They will run any style weight you want so your current calibration stays with the clutch. You can run the huge assortment of ski-doo springs available (currently the biggest selection on the market).
It can run any belt width you want by changing a spider shim. The 3 arm clutch can hold 400 horsepower no problem.

Sure if you want to monkey around learning about and paying for ski-doo ramps, arms, pins.

Never being able to run a setup other winders are running/recommending.

Yea go ahead and get the Tapp clutch.

As for the Billet Pro-4 show me a website that has spare parts? I couldn’t even find any info on the web about the details on the Billet
pro-4?

STM is clearly my choice for all of the above reasons

Just relaying what Im hearing from some of the tuners out there, and reading. Apparently the STM is having issues as well with this 998 motor.

TAPP seems to be the only one with alot of time and miles on a triple. It does not use flyweights like the pro4, or stock clutches. I always loved the old TRAs on all my Machs and actually have much more experience with them. Clickers for tune fast tune adjusting is a huge bonus too.

Just doing research at this time, and i'm sure this will be an ongoing thing to watch. The more 998s out there with tunes now, and more seasons go by....It sure seems stock stuff is not gonna last.

Give Dave a call at Powder Lites. He had alot of good info. Wasn't trying to sell me, just info.

Dan

 

[journeyman]

No disrespect ,but that was then this is now they are made in thief river falls. I used to run a Suzuki

The sled is built up there as we know. The motor is not and the clutches are not.

 

[boostfever]

Being OCD sucks.....hard to sleep with images of blown clutches in my head...LOL

So this AM made a couple calls, PMs and posts....got some info here. Not that Im jumping ship already as mine has barely been used this season so far, lots more miles coming up soon though.

It does seem for 270+ tunes to get longevity and peace of mine, the one way to go is to go aftermarket. I believe belt life from what im reading and hearing comes along with these clutches as well. Currently the STM is not doing well in comparison to the Pro4 and the TAPP, so I dug deeper into these two.

TAPP($1350 us) costs more then Pro4 3 arm($1195 us).

Pro4 is a 3 arm Billet clutch(not 4) that uses a comet style design flyweight, which allows for use of our current YAM/Dalton weights. Pro4 3 arm uses a TRA spring.

TAPP is a 4 arm Billet clutch, which is a TRA design more or less...it uses ramps and arms, and has Clickers like a TRA which is handy for tunes, and also has ramps that can be turned around for diff profile. TAPP has been tested/run for some of the best reviews on BIG BOOST turbo 1200 doos over several seasons. TAPP uses the 8DN YAM belt(from Japan) and Dave at powder lites is impressed with this belt and the longevity these highly boosted doos are getting from them. TAPP does not need anything for 10,000 miles, and some are over 20,000 miles with no wear.

Really hard to deny the TAPP. And while the Pro4 3 arm may be a great billet clutch, I think the price point of $1195 for an EMPTY clutch is not as good as a fully loaded TAPP for just $155 more.

I think going this route is eventually what most tuned guys will need to do, if they want to keep a tuned 998 around for many seasons/miles. I like the idea of keeping this clutch from one sled to the next, if/when you trade up. Removing the stocker before it wears out/explodes and selling sled stock.

Just more info for us all to consider as miles pile onto our Winders.

Dan

Tapp clutch is very shiny

 

[Mototown]

If y

It’s good to see that Yamaha finally put a motor in a arctic cat, and arctic cat put a chassis around a motor for Yamaha because Yamaha could never make a sled ,just a motorcycle engine , then they tried to make a chassis around it RX1, apex, now you have a sled. Just different colors ,and by the way ac didn’t make the clutchyamaha clutch

I would put my 08 Apex chassis against my sidewinder through the bush . The Apex chassis with snow trackers and rear shock mod to the ohlins ( it took me me 8-9 rebuilds & almost double comp shim stack to get right ) is faster corner to corner. The only down fall of the Apex is the seating position & power options the sidewinder has . We will see in couple months how much cat crap is left in chassis with the new release...
Don't get me wrong cat basic design is good , but they lose a lot some where from the design drawing to actual production units ...

 

[NYTurbo]

Just took my STM off and put my team back on , and my oh my is the Team ever quiet. Lol

 

[ClutchMaster]

Well just going out on a limb here..... put any clutch on a vibrating motor and I’m sure there will be accelerated wear.

As for my STM I have had no issues almost 4K miles, rollers are tight.

Atleast STM is honest enough to admit they have had issues, most would try to cover up any problems they have had. M2C

 

[journeyman]

What does the STM weigh?

 

[NYTurbo]

I rebuilt my STM last year new bushings and sliders, cost me $200 cdn including labour , still rattles a bit but pins, rollers , sheaves are all fine with 3000 miles on it.

 

[STAIN]

Lets everyone take a deep breath here!!!! As was said before, by experts such as the people at Dalton, it looks like a ROLLER bushing issue is the main culprit. Have we seen any clutches break that DID NOT have a roller worn out? How about we try and find a roller/harmonics remedy before we go and spend $1500 on a clutch?
We need some snow to ride so this "sky is falling" mentality will subside.

 

[journeyman]

Is there a consensus on which rollers in both the primary and also the secondary have the most durability? Yamaha’s or an aftermarket roller?

 

[fatchance]

I would think that we'll have a better idea if this is more widespread as more guys start inspecting their moveable sheave. I haven't had a chance to look at mine since my sleds up north, but i picked up a spare Yamaha moveable for $88 bucks just in case there's a run on them.

 

[SuperTurbo]

Your talking STM primary clutch, which one 3 or 4 weight

Primary, Cuatro

 

[Thunder Products]

Have we seen any clutches break that DID NOT have a roller worn out?

Yes, plenty!

Look at all my pics I have posted. There are 2 clutches sitting right behind me where the rollers are perfectly fine.

 

[Wingwong]

If you read the posts on Facebook, everyone in AC world is having issues just like we are, here is a snap shot I found funny thing, guy in post is recommending a Yamaha clutch for his AC, and here we are doing the opposite. Lmao. It’s safe to say, no clutch can handle the awesome power of the Yamaha 998turbo fully tuned.

@ROCKERDAN , lots of good info on Facebook, any videos on Facebook or info are not available on any other platform. With your content, I’d recommend you get on their and create an account. People would appreciate you lots their too.

 

[Wingwong]

Also this post was 2 bdays ago