Yamaha, there is a possibility of someone getting hurt with these SW primaries!

[KnappAttack]

Agreed. I rode mostly Northern Ontario last winter, sustained RPM for long periods of time. That’s still shitty life span for an expensive set of weights, and wondering if switching to 15.6mm rollers will give me better longevity?

If it did it would be negligible.

Honestly you would be better off with PB80 on the Sidewinder if you ride at one speed, that PB80 clutch has no clutch arms.

 

[74Nitro]

Typically groves in the arms and sheave faces come from riding in one range too long and most of the time. Say you ride at a consistent speed like say 60 MPH for miles on end.

Agreed, and roller size has no effect IMO. The red head triples were also bad for this, the SRX triples not so much.

 

[Thunder Products]

Thunder Products, I will get on my phone later and send pictures of my SECONDARY that was cracking also, but caught in time. Dont know if you have seen many secondary clutches that have gone bad but I can show you one!

Yes, I have seen a couple of these also.

 

[Thunder Products]

ANY chance the clutches are not balanced enough from the factory? Terry > any of the clutches that broke up balanced or possibly have a balance issue? Any thoughts on clutch balance on this? Hearing a lot of the Cat Team clutches are out by a bunch.. Are you seeing this on the Yamaha clutches?

Yes, some of the clutches that come in need extra balancing...but nothing to the point where it would make it explode (IMO)

Yamaha clutches have been off, but the TEAM primaries are really bad...same as the Polaris.

 

[Thunder Products]

Here’s a sort of but not really related question for TP and any of you other guys who’ve run both the old 1049 three holer and the new 998.........these triples have always had vibes and been harder on clutch pieces than the four banger ever was, grooved flyweights with some miles on them is a fact of life from what I’ve seen with the sleds I service. Has anyone noticed less flyweight grooving using larger rollers vs. smaller rollers? Can you run the flyweights for more miles before the grooves show up with one size roller vs. another? I know this is a little off topic here, but it’s been on my mind lately after grooving up a set of new (and expensive) weights fairly quickly. Most of the guys I’d PM for insight have already responded to this thread. Sorry to get a little off track here.

The ones that have switched to an older Yamaha primary are not having issues anymore like the SW primary. As you have read here, some have on 10,000 miles and no issues.

A lot of the clutches that have come in for repair or rebuilding that have a lot of grooving on the rollers, show rust on the sides where the weight does not touch. There have been a lot of clutches that come in where the clutches are pure white from salt spray that was left on them and/or oxidation from humidity from sitting in very humid conditions.

Think it comes down to maintenance with most of these.

 

[Stubbs]

Keep in mind I am talking about the old school primary on my 1049, not the new Winder clutch........Thanks for the opinions and sharing your experiences guys, appreciate it. I’ll stick with the 14.5mm rollers and ride on.

 

[Turboflash]

ANY chance the clutches are not balanced enough from the factory? Terry > any of the clutches that broke up balanced or possibly have a balance issue? Any thoughts on clutch balance on this? Hearing a lot of the Cat Team clutches are out by a bunch.. Are you seeing this on the Yamaha clutches?

Had both my stock Team clutches balanced last fall. Both were almost right on. Only a little touch-up needed

 

[jonlafon1]

Had both my stock Team clutches balanced last fall. Both were almost right on. Only a little touch-up needed

That’s good to hear! I have a 8000 I’m setting up now for my girlfriend. O wait it might be my back up sled also?

 

[razor_220]

I went to the CVtech PB80 clutch this season, only have about 300km on it. So far it feels pretty good! Here's to hoping it lasts!

 

[rxwhopper]

add one more to the list of blown clutches

 

[rb2001srx700]

question would be why take the thickness out of the clutch? doesn't make sense to. Won't that effect the heat distribution as well? Has anyone checked to see how hot these clutches are running. Hot clutches usually equal disaster. At least that was always a concern with my 2001 SRX. After testing and hard runs I was always able to touch the clutches and not burn my hand. Just a thought. I will admit I am new to the four stroke side and might be wrong. Could someone add to this and correct me if I am wrong here. P.S running 2020 SR Viper with Thunders BIG VENOM kit and 911 cover. 1 mile on sled so..... and need to check the secondary yet for casting issues. NEED SNOW TO TEST URGHHHHHH.

 

[Thunder Products]

question would be why take the thickness out of the clutch? doesn't make sense to. Won't that effect the heat distribution as well? Has anyone checked to see how hot these clutches are running. Hot clutches usually equal disaster. At least that was always a concern with my 2001 SRX. After testing and hard runs I was always able to touch the clutches and not burn my hand. Just a thought. I will admit I am new to the four stroke side and might be wrong. Could someone add to this and correct me if I am wrong here. P.S running 2020 SR Viper with Thunders BIG VENOM kit and 911 cover. 1 mile on sled so..... and need to check the secondary yet for casting issues. NEED SNOW TO TEST URGHHHHHH.

It's not a heat issue...it's a design issue.

They took the webbing out to save weight because everyone was complaining about the 4 strokes being heavy. This clutch was made specially for the turbo sleds to lighten up the 4 stroke turbo sleds. They also lightened up the bolts on the suspension changing them from M8 threads to M6 threads....why? To save weight.

 

[Turboflash]

^&#*&^@@+#

 

[rb2001srx700]

Okay. I don't believe heat was ever mentioned, I could have missed it. Just doesn't make sense to loose weight in something that is so important. And as well stated a safety issue now. I hope you get your answers and they correct this issue.

 

[Turboflash]

As mentioned above, Team primaries crack on movable side down low by center roller bearing. Sounds like same situation as Winder, clutch is very thin down there. Because it's thin, it doesn't take heat very well so gets heat checked which leads to start of crack. Eventually, clutch blows apart with massive carnage and potential personal injury. See pics.