Secondary movement?

[192 Woodys]

How much should the secondary be able to move side to side(toward the engine and back)

 

[Focker]

Alot less than what Yamaha sold these sleds with! I believe its only supposed to be about a 1/16 of an inch or so.

 

[RX1 Yooper]

I don't think there should be any movement.

 

[192 Woodys]

Mine is sliding about 1/4 to 1/2 inch, do I have issues? If so, what should I be looking at?

 

[LazyBastard]

I think that there is some level of misinterpretation here.

There is the question of rotational, along the shaft, and in the direction of belt.

There is normally lots of rotational motion, yes, half inch rotation on the outside is normal.

Along the shaft, 1/16 is normal.

If there is ANY motion in the direction of the belt, then your jackshaft bearing is toasted and should be replaced before being driven again.

 

[192 Woodys]

I can slide mine on the shaft, 0 shaft movement, the clutch can just slide quite a bit.

 

[LazyBastard]

If you've got 1/4 to 1/2 inch slide along the shaft, you've definitely got something weird. I would look at the bearing to make sure it hasn't moved.

 

[192 Woodys]

LB just went out and checked it again, and now it will not slide more than approx 1/8" ran it hot and still same amount of play. Should there be any washers between the bolt to take the secondary off and the secondary?

 

[LazyBastard]

There should be shims to control the alignment and limit the motion. It is preferable to have NO play, but you need to make sure that your alignment is EXACT.

Also, if you have changing movement of the secondary, you should check the bearing behind it to make absolutely sure that no part of it, like the retainer, is loose.

 

[Convert]

Had to remove the shim in back of my secondary to get the clutch alignment correct keep in mind when the belt engages it pulls the secondary into alignment somewhat through centrifigul force. My issue was it could'nt go in far enough with the spacer in there to get within spec, in and out movement of the secondary is expected be far more worried about up and down, side to side movement thats that damn bearing :evil: Also there is a tapered collar that slides into the bearing that has been known to work it's way loose C clip comes loose makes it vibrate like hell!

 

[SumpBuster]

Read the posts I started on 'vibration..check this out'. I included the specs from the shop manual. With the split collar in proper postion (which is about flush with the inner race, as the driven rests here when pushed in to check alignment) there should be .590 offset, + or - .060". My blue one did not move and was right on the money. After tapping the collar back in on my black one, it is again right at about .600" offset. The problem is that both had up to 1/4" free play that the driven could slide out. And that is where the collar pushed my driven causing the vibration. Caught it quick, and there is no damage. I made the freeplay about .050 with a feeler gauge (made my own spacer).

 

[black john]

taperd bushing

the taperd bushing on the 03,s has nothing to hold them in place. on the 04,s the bushing is theraded on the inside and has large washer and nut to hold it in place. it seems that it gets pushed out and ruins the offset setting and belt plus kills your power this i know as it has hapend to me so in place of the nut and washer in am drilling the bushing and taping it and installing aset screw on the in side of the bearing to lock it to the jack shaft. simple fix i am allso making a driver to remove the bearing and sleve so i will not have to remove the chain case and shaft just to replace this bearing 8)

 

[Convert]

Dealer called today my bearing is fine it was the collar that came loose put gouges in my secondary sheeve and wore a groove in the shaft. He's fixing with the 04 parts like Blackjohn said its a threaded collar with a washer and nut on the inside of the shaft to keep it from coming loose. Sounds like he has a good fix he's doing to his.

 

[SumpBuster]

I still believe that if the offset is set correctly, and the shims on the outside are to spec..that collar can't go anywhere. Mine started to tighten up nicely while still about .050 out from the inner race, which is now the .050 gap on the other end. So it will remain tight on the shaft. And it can't spin, even with light force, as if it did, then your ball bearing is shot. You should be able to hold an inner race of a ball bearing with your fingers, while the OD is turning. Many bearings are on with a light slide fit. The collar does not have to be brutally tight..it just needs to stay where it is, and limiting the amount the driven can move out, will do it.

 

[Convert]

Sumpbuster any wearing on the shim / spacer that rubs up against the collar I had the thickest one and it had a groove from the collar that went half way through it ?