No washer behind secondary

[Fleecer]

My sled came without any washers from factory and measures 61.

 

[Soupy]

My sled came without any washers from factory and measures 61.

The spec is 58-61 and more people are suggesting less than 61. Not a very good setup from Yamaha.

 

[**sj**]

with the washer out Im damn close to 60...

 

[SUC_doo]

Mine had no washer from stock. 2400 miles so far no issues.

 

[fourload]

Mine had no washer. No issues or blown belts @61mm. 650 miles so far.

 

[Soupy]

At least they're somewhat paying attention at assembly and not just throwing them all together the same. This probably means that your offset is on the high side so hopefully you don't ever need to decrease it.

 

[rnusr01]

Mine is 60.95 with washer

 

[JPS]

My sled came without any washers from factory and measures 61.

My sled also came with no washer and is 61, thats where i have been running it with no issue. 1495 miles on stock belt

 

[HMTurbo]

Mine came with 2 behind. Both out I measure 61.25.

 

[Soupy]

My sled also came with no washer and is 61, thats where i have been running it with no issue. 1495 miles on stock belt

What does your c to c measure out at?

 

[grubf]

The stock secondary allows float, after the sled is moving, outward not inward.

????? Explain please. Why would it not float inward? Except if it is limited because there is simply not enough room to float in. In that case machining the backside of the secondary is seeming like best option.

 

[Soupy]

????? Explain please. Why would it not float inward? Except if it is limited because there is simply not enough room to float in. In that case machining the backside of the secondary is seeming like best option.

Because the helix/moveable sheave move inward when shifting, creating a gap on the outside of the secondary, thus allowing it to float outward not in. It cannot float inward (unless it has previously floated outward) because the secondary is always pressed up against the hard stop (circlip, shims) on the jackshaft behind it. Install the secondary with no spring & you'll understand better.

If proper offset for YOUR setup (not what the book says) cannot be decreased enough by simply removing shims, then the only options that I see are to move the motor/primary outward or machine the secondary to move inward.

 

[grubf]

I understand how the movable sheeve works. During the shift it creates a gap on the outside of the secondary. This has nothing to do with the entire clutch assembly moving on the jackshaft. (A Floating Clutch) If there was room to move in the clutch would self center so the offset was always correct. Unless there was binding between the clutch and jackshaft. All the older Arctic Cats were set up this way. It is not theoretically necessary for the backside of the clutch to ride up hard against the jackshaft bearing/circlips whatever. If it was supposed to be that way there would have been some kind of thrust washer in between the clutch and jackshaft bearing. There is no such thing. Only shim washers. On the older Cats the shim washers were just to get you in the ballpark. There was still enough play to allow the clutch to truly float. On a properly set up Cat the entire clutch assembly would move in and out about 3/8 of an inch. Checked while not running of course. It seems like we are all across the board with factory offsets. Some guys are having trouble and some are not. It is either in the manufacturing process or the engineers did not allow for enough adjustment to achieve proper offset.

 

[Soupy]

Im with ya, should be able to just machine 1/8" off & be done with it. Might work if we add 1/8" of float. Now that I've seen measurements on the high and low side of the tolerance, I'm trying to point the finger at center to center distance causing an offset problem. In my case my c to c is at the very bottom of the tolerance and at 58.5mm offset the secondary still needs to move further inward for the belt to be straight when shifting.

 

[Brian Friebel]

Had anyone tried no washer behind secondary? Did the bearing clip do anything to the hub?

Mine has no washer behind secondary. Came that way stock. It is also right at about 61 mm. Almost 2000 miles same belt