Primary clutch exploded

[snowbeast]

The older clutches will work, but they dont have the overdrive like the winder clutch.

That is true,but gear it a tad higher,rather be safe than sorry. The old apes,came geared taller than our winders are,maybe Yamaha was onto something.

 

[NYTurbo]

The overdrive is easy to add simply machine the clutches

That will make the it so the weights can go by the rollers easier, dont think you want that.

 

[Fast]

That is true,but gear it a tad higher,rather be safe than sorry. The old apes,came geared taller than our winders are,maybe Yamaha was onto something.

We had to take .060 off the apex clutches to get the belt 1/4" from the top of the clutch they were dogs unless you did this

 

[Thunder Products]

That will make the it so the weights can go by the rollers easier, don't think you want that.

You are correct that moving the moveable sheave in closer to the the fixed sheave would allow the weights to go by the rollers.

The SW clutch we used in testing was machined for overdrive .030" off each sheave at the bottom and was the test subject with the roller without the bushing test.....HH weights still would not go past the roller....even with the bushing out of the roller.

 

[ROCKERDAN]

Easy fix for all the Primary issues...

TEAM

Cheaper then apex clutch which has less OD and is more costly and will still rattle!

Dan

 

[journeyman]

Speaking of the older YXR clutch. I believe if you look them over closely there is something stamped on them like Tushima or some Japanese name. My gut feeling was this is the name of some foundry in Japan or somewhere in the Orient.

I am wondering if the newer SW clutch has this stamped anywhere? If not my theory of it being mfg'd somewhere else could be true.

 

[**sj**]

IMHO the problem with the new clutch is the weight pocket and lack of webbing back to the sheave like the old clutch....seems they fail right through the set screws often ...the sheave flexes repeatedly and finally fails in its weakest spot

 

[sideshowBob]

Because of sheave and belt angles ect, if you were to install an Apex Primary on a Sidewinder would you not have to change to an Apex Secondary?
Does an Apex Secondary fit on a Sidewinder?

 

[helix]

that broken clutch is not the fault of the clutch or the flyweight used whatsoever.

The roller went out and let the flyweight flip up and in that lever position it breaks away the clutch....it would not matter what the material or webbing or anything else....if the weight flips over like that it is swung the wrong way and at rpm on a sled like this it will break away...either the pin , the mounting hole section, or the part of the moving sheave that attaches it.

The roller went out...that is what caused this.
If the roller went out and the weight flipped on any clutch it would (and does) happen the same.
I've seen it happen in desert racing Razr models, etc.it breaks exactly the same way.

Just seen one come in here recently on a Arctic TEAM clutch from a Wildcat Side by side (slightly smaller diameter but same clutch as on a sled).
...EXACTLY same thing happened to it. The guy bought our sample clutch from testing of that vehicle that I had sitting here.

It seems that rollers are having problems on this engine/model, and they are well known to go. We hear of it all the time. Keep a eye on them.


....the roller went out.

 

[**sj**]

Because of sheave and belt angles ect, if you were to install an Apex Primary on a Sidewinder would you not have to change to an Apex Secondary?
Does an Apex Secondary fit on a Sidewinder?

of course yes primary , no...secondary wont fit...a sr viper secondary will and does...and I have one for sale fyi

 

[Thunder Products]

Easy fix for all the Primary issues...

TEAM

Cheaper then apex clutch which has less OD and is more costly and will still rattle!

Dan

They are blowing up also and are not rebuildable.

Because of sheave and belt angles ect, if you were to install an Apex Primary on a Sidewinder would you not have to change to an Apex Secondary?
Does an Apex Secondary fit on a Sidewinder?

The APEX primary will work with the SW secondary

 

[**sj**]

that broken clutch is not the fault of the clutch or the flyweight used whatsoever.

The roller went out and let the flyweight flip up and in that lever position it breaks away the clutch....it would not matter what the material or webbing or anything else....if the weight flips over like that it is swung the wrong way and at rpm on a sled like this it will break away...either the pin , the mounting hole section, or the part of the moving sheave that attaches it.

The roller went out...that is what caused this.
If the roller went out and the weight flipped on any clutch it would (and does) happen the same.
I've seen it happen in desert racing Razr models, etc.it breaks exactly the same way.

Just seen one come in here recently on a Arctic TEAM clutch from a Wildcat Side by side (slightly smaller diameter but same clutch as on a sled).
...EXACTLY same thing happened to it. The guy bought our sample clutch from testing of that vehicle that I had sitting here.

It seems that rollers are having problems on this engine/model, and they are well known to go. We hear of it all the time. Keep a eye on them.


....the roller went out.

I am not speaking of any particular event...but I have seen them fail where the roller is still in place????

there are some case where the nut must have rattled loose off and no roller is exactly what you say..no roller guarantee failure..

therefore, I feel blue lock tite is a good move on the weight and roller bolt and nut...

 

[ROCKERDAN]

They are blowing up also and are not rebuildable.

I have not seen one TEAM yet afer recall.....show me one please. Been asking for months, not one on HCS and many are tuned, no issues. Certainly far better then YAM primary which rattle,kill rollers, and you have shown blow apart.

Thanks
Dan

 

[yamaha06]

Inspected my primary clutch and all looks good so far. What is everyone having the best luck with for primary rollers? I put in a set of thunder products primary rollers last season. They have about 1500 miles on them and still seem good, may have to order another set for back up just incase.

 

[NYTurbo]

that broken clutch is not the fault of the clutch or the flyweight used whatsoever.

The roller went out and let the flyweight flip up and in that lever position it breaks away the clutch....it would not matter what the material or webbing or anything else....if the weight flips over like that it is swung the wrong way and at rpm on a sled like this it will break away...either the pin , the mounting hole section, or the part of the moving sheave that attaches it.

The roller went out...that is what caused this.
If the roller went out and the weight flipped on any clutch it would (and does) happen the same.
I've seen it happen in desert racing Razr models, etc.it breaks exactly the same way.

Just seen one come in here recently on a Arctic TEAM clutch from a Wildcat Side by side (slightly smaller diameter but same clutch as on a sled).
...EXACTLY same thing happened to it. The guy bought our sample clutch from testing of that vehicle that I had sitting here.

It seems that rollers are having problems on this engine/model, and they are well known to go. We hear of it all the time. Keep a eye on them.


....the roller went out.

The roller in many SW clutches that are flying apart are still in place.