Conquest clutch belt vibration

[thorn]

Two trips ago my Conquest developed a pretty bad vibration in the clutch belt. At about 2800 rpm it has a very visable vibration inn the belt. After changing the clutch weights in the primary for high altitude and putting the secondary spring in hole #2 it was running as smooth as ever.

The only thing I did different before the vibration happen was to put a new belt on that was a hair tighter being new. After the vibration i swapped the old belt back on but it is doing the same thing. I checked th bolt on both clutches and they were tight. I also tighten the idler chains a bit.

The only thing I notice a foul is a shiny wear spot on the base of the secondary spring housing. I am in the process of taking that apart.

Is there a top/bottom to the way the secondary spring goes in? Is it possible to get the transmission tilted enough to throw things off after tightening the idler chains?or any other thoughts???

[ARGOJIM]

Side to side play in driven bushing, in your hands twist faces away from ramps and wiggle ( vibration usually accompanied with a growl). Be sure to check that all 3 bumpers are still in place.

[thorn]

Side to side play in driven bushing, in your hands twist faces away from ramps and wiggle ( vibration usually accompanied with a growl). Be sure to check that all 3 bumpers are still in place.

Jim,
The bumpers were one of the things I checked first and all there. Yes there is movement of the two plates when I twisted the face and clamped them together with a c-clamp vise grip to disassemble it. I thought it wasn't doing that before.

What is the fix then with the bushing?

I just looked at a parts diagram and the bushing is what the base of the spring is rubbing/wearing against. It looks like there is a small grub screw that locks the bushing in place?

[ARGOJIM]

Honestly I've never had that style of that clutch apart, perhaps pm RD or JBF.

[thorn]

Ok. Thank for the info Jim.

[thorn]

Update... It appears that my bushing in the secondary or driver clutch is worn an is creating the wobble/vibration. I am going to have to press it out with a hydraulic press as I can not punch in out with a flat head screwdriver and mallet.

I think I know what caused this to happen so suddenly after changing to a new belt. The brand new belt that I put on was being carried as a spare in the under seat tool box and was folded in half to fit in there. It had taken a set shape after being in there for 3+ years and when I put it on I could see that it was running at idle with an obvious lopsidedness to it. I just assumed that after it got hot it would straighten out and not be an issue. I guess it would be wise to let these unfold in the sun for a while before putting them on the machine (unless you break one on the trail).

Update again... Swapped out the bushing (you will need a hydraulic press) and no more vibration!