Primary clutch exploded

[Wisco4Toke]

Not sure what you want them to say. I don't need them to tell me that adding a lot more horsepower could put other parts of the drivetrain at risk.

You must have signed the waiver then.. Why reply to my question if you already know then..

 

[ClutchMaster]

View attachment 144642 View attachment 144643 Heres a couple pics of an updated 2017 Thundercat team clutch from Facebook today.

Nothing to do with the clutch, thats a bad setup, slipping the belt on take off. Heat cracking. Probably that stellar cat clutching calibration.

 

[jonlafon1]

Lol. WTF is that? Obviously something is way off on this set up. Yea way to much slippage and or way to tight of sheave clearance. Wonder if it made any noise at idle or smelled like burning belt after take off???? Belt dust ?

 

[74Nitro]

You must have signed the waiver then.. Why reply to my question if you already know then..

My reply was in no way meant to be disrespectful or offensive. That is my opinion and I replied because you asked.

 

[KnappAttack]

The Pics above from BBY2000 is typical of any cast clutch that has been drag raced hard or slipped severely. ALL cast primaries will heat crack at the post or movable like this, Yamaha, Polaris, Cat or Doo, doesn't matter the brand. I'd always carry two new spare clutches in the trail when drag racing because sooner or later they were going to heat crack there just like that, but the owner has certainly neglected to look at his in this case. When the cracks would start to show there we'd throw that clutch away and install a new one.

Even the stockers would crack em. Drag racing from a dead stop is hard on them! Imagine high RPM and engaging at anywhere from 5000-8000 RPM! Now put some of todays Turbo power on it!

 

[ClutchMaster]

The Pics above from BBY2000 is typical of any cast clutch that has been drag raced hard or slipped severely. ALL cast primaries will heat crack at the post or movable like this, Yamaha, Polaris, Cat or Doo, doesn't matter the brand. I'd always carry two new spare clutches in the trail when drag racing because sooner or later they were going to heat crack there just like that, but the owner has certainly neglected to look at his in this case. When the cracks would start to show there we'd throw that clutch away and install a new one.

Even the stockers would crack em. Drag racing from a dead stop is hard on them! Imagine high RPM and engaging at anywhere from 5000-8000 RPM! Now put some of todays Turbo power on it!

Even on trail machines this can happen within a few hundred miles if the weights don’t push hard enough after engagement. The 2013 A/C 1100T were famous for it, .060” spider shim is needed to prevent this kind of wear.
The equivalent on a yami clutch would be using smaller rollers.

 

[Thunder Products]

Saw the exact pics that @BlueByYou2000 posted. This one popped up as well.

 

[jonlafon1]

VERY curious if the clutches coming apart have blown belts? Like how many belts have you blown before the clutch came apart?

 

[number1kyster]

Saw the exact pics that @BlueByYou2000 posted. This one popped up as well.

View attachment 144656

I believe this guy commented that his roller bolt fell out. He found the parts in his belly pan.

 

[jonlafon1]

Saw the exact pics that @BlueByYou2000 posted. This one popped up as well.

View attachment 144656

Serious spring bind on that primary spring. Seeing black marks from belt breakage

 

[Thunder Products]

VERY curious if the clutches coming apart have blown belts? Like how many belts have you blown before the clutch came apart?

Most of the ones I have worked on or seen in person blew a belt before their clutch came apart...from the owners words.

 

[jonlafon1]

Most of the ones I have worked on or seen in person blew a belt before their clutch came apart...from the owners words.

K thanks. Just wondering if blowing numerous belts on this clutch might increase the odds of things coming apart like some are?

 

[Thunder Products]

I believe this guy commented that his roller bolt fell out. He found the parts in his belly pan.

You are correct...reading it now from Steve's post.

Dalton clutch kit

 

[ClutchMaster]

K thanks. Just wondering if blowing numerous belts on this clutch might increase the odds of things coming apart like some are?

Dam Soupy better get a new clutch, I thinking he’s around his 50th anniversary belt or something like that.

 

[69redmach!]

Mine had never blown a belt and the belt survived this clutch failure as well