Space behind primary?

[ROCKERDAN]

No point in pulling the stub shaft #*$&@'y if the problem is with the motor or chassis.

Agree.....I will know more tomorrow when I look closer.

Has anyone had luck or tried moving the engine to any decent amt of movement? Or is it basically locked where it is without ability to move it any appreciable distance?

Dan

 

[lakercr]

Well Soupy has checked all his alignment so everything is relative to the jackshaft. But there is one more check that I have never seen off so I don’t always check it. That would be checking the level of the motor in reference to the jackshaft.
Use a quality machinist square like a starett not a hardware store tee square. Place the tee square on the non movable sheave, same place you measured offset too. It will probably not read level, if not level jack up the low side of the sled until it reads level. Now take the square and place it on the primarys machined surface right next too the cover bolts. You may need to turn the primary so one of the slide towers are are in the correct position for measuring. If you use a good square it will be very accurate. I have never seen this measurement off far enough to worry about other than crashed sleds, but it’s worth checking on Soupy’s.

If you have an iPhone, the built in angle finder works very well for this also.

 

[Soupy]

Well they couldn't put it on the dyno, wrong track pitch. He assured me the engine location & mounts are good. He tweaked offset, Dalton' s and replaced secondary moveable bushing & says he's pretty confident but can't guarantee it. Hoping to ride the U.P. this wknd to try it.

 

[VX1R]

Well they couldn't put it on the dyno, wrong track pitch. He assured me the engine location & mounts are good. He tweaked offset, Dalton' s and replaced secondary moveable bushing & says he's pretty confident but can't guarantee it. Hoping to ride the U.P. this wknd to try it.

Hopefully they've got you belt munching problems figured out.

What part of the U.P. are you hoping to ride this weekend?

I'll be in the Keweenaw area and hoping for some fresh stuff to arrive.

 

[Soupy]

Hopefully they've got you belt munching problems figured out.

What part of the U.P. are you hoping to ride this weekend?

I'll be in the Keweenaw area and hoping for some fresh stuff to arrive.

Paradise area. Hoping the same!

 

[Beerman]

Hey guys - not sure where best to post this, but with all the great progress we're making with belt life in other threads I thought I'd resurrect this. On my new 2018 I had already machined the secondary down for a 58mm offset. 2 weeks ago while riding with @ClutchMaster I blew one belt at speed on a long straightaway. Measured offset again to check everything and I was now at 59.5mm! One blown belt snap and the stub shaft moved in 1mm - 1.5mm. So out came the slide hammer and bench press to push it back so that I am again at 58mm offset.

I'm not sure what the long term solution for this is, but if you're one of chasing belt durability issues and are watching offset, I suggest checking it again if you've blown a belt since setting it all up.

Pic is the of the stub before I pressed the bearing back into place.

 

[Doowithblue]

Can it wind in far enough to rub against the bolts? Another thing to check. I know on my 17 i installed the button head screws. Didn't do anything to this 18. Yet.

 

[Beerman]

It can and does. Go back to the beginning of this thread and you'll see what @Soupy found. I had that same situation on my '17 after several belt snaps - the backside of the primary starts to make contact with the 4 bolts holding the stub shaft in. It's a TERRIBLE design to not have some kind of retaining clip behind that bearing. For God's sake - Our bogie wheels have circlips.

 

[KnappAttack]

Hey guys - not sure where best to post this, but with all the great progress we're making with belt life in other threads I thought I'd resurrect this. On my new 2018 I had already machined the secondary down for a 58mm offset. 2 weeks ago while riding with @ClutchMaster I blew one belt at speed on a long straightaway. Measured offset again to check everything and I was now at 59.5mm! One blown belt snap and the stub shaft moved in 1mm - 1.5mm. So out came the slide hammer and bench press to push it back so that I am again at 58mm offset.

I'm not sure what the long term solution for this is, but if you're one of chasing belt durability issues and are watching offset, I suggest checking it again if you've blown a belt since setting it all up.

Pic is the of the stub before I pressed the bearing back into place.
View attachment 145093

Art,
I hope you disassembled the shaft, cleaned and re-loctite the shaft on the bearing using something like green 638 or such so it doesn't happen again. Probably like the oil tank seal, where Cat's not using enough sealer on the oil tank, Yamaha is probably not using enough loctite or even any loctite on the shaft from the factory, blow a belt and boom, over it goes.

I sure hope they bring back the Apex or R1 engine, turbo it and put it in a decent chassis, that means something like a ski-doo chassis too, not a poor engineered Cat. This three cylinder 998 clutch ratteling hunk of crap is for the birds! They didn't do their home work on this 998!

 

[Beerman]

Art,
I hope you disassembled the shaft, cleaned and re-loctite the shaft on the bearing using something like green 638 or such so it doesn't happen again. Probably like the oil tank seal, where Cat's not using enough sealer on the oil tank, Yamaha is probably not using enough loctite or even any loctite on the shaft from the factory, blow a belt and boom, over it goes.

I sure hope they bring back the Apex or R1 engine, turbo it and put it in a decent chassis, that means something like a ski-doo chassis too, not a poor engineered Cat. This three cylinder 998 clutch ratteling hunk of crap is for the birds! They didn't do their home work on this 998!

Damn. I'm not that smart. I just pressed it back into place . . . It wouldn't be too hard to take it all apart (again) and Loctite it. I'm going riding again Feb 2-3, so if I snap another belt I know this will move in again. At which point I'll do that. Thanks for the sage advice Mike!

 

[KnappAttack]

Damn. I'm not that smart. I just pressed it back into place . . . It wouldn't be too hard to take it all apart (again) and Loctite it. I'm going riding again Feb 2-3, so if I snap another belt I know this will move in again. At which point I'll do that. Thanks for the sage advice Mike!

I though you'd want to correct that prior to running it again if you hadn't done the loctite part Art. Let me know if you need a press or loctite, I have both here at my place.

 

[jagger2014]

I have the same thing goin on as well...here is a pic of mine..

 

[Beerman]

I though you'd want to correct that prior to running it again if you hadn't done the loctite part Art. Let me know if you need a press or loctite, I have both here at my place.

Then maybe I will. Thanks for the offer, I have both, just need to make/find the hour to do it.

 

[KnappAttack]

I have the same thing goin on as well...here is a pic of mine..View attachment 145095 View attachment 145095

Ummmm, why does that look like a broken stub shaft still in that drive clutch? I see where the primary has moved in and worn away at the sheave, but whats going on where the shaft is supposed to sit?

 

[jagger2014]

Ummmm, why does that look like a broken stub shaft still in that drive clutch? I see where the primary has moved in and worn away at the sheave, but whats going on where the shaft is supposed to sit?

that was a hurricane stub that twisted off after 60ish miles on it