snowhite
Pro
Hello guys', ok something just wasn't right today on my vipers secondary. Took it off to clean it and add a shim to the 3 bolts to DECREASE width to lift up the belt. There was quit a bit of deflection and the belt was sitting low in the secondary. So the bolts already had a shim under them, it was the thicker one so I added the thin one too. When I installed the clutch back on and ran the track for a while and stopped the rotation the belt was sitting lower when it should have came up ! It seemed like the clutch wasn't closing back together. Never seen this one should have came up if any.
canadianhunter
TY 4 Stroke Junkie
If I am thinking right you should take the shims out to let the secondary close up
sk-rx1
TY 4 Stroke Guru
Taking shims out pushes the sheaves apart, lowering belt. I believe the issue is that because of the engine braking when you let off the throttle the belt never comes all the way up. Sometimes you can let off the throttle gently and it will work out. Best way is just see where it sits when on the trail. You can also take the belt off and set it in the clutch to see where it sits.
canadianhunter
TY 4 Stroke Junkie
My bad, having a bad day.
titanrcr
TY 4 Stroke Junkie
- Joined
- Jan 3, 2011
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- Location
- Old Forge, New York
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- Snowmobile
- 2019 Sidewinder LTX LE
2015 Viper LTX SE
2011 Apex
When the track is suspended off the ground the belt and secondary clutch will act differently from when your actually driving the sled. When it's suspended your relying only on the side pressure generated by the secondary spring to close the clutch faces. When driving the sled at low speed or uphill you also have the torque sensing ability of the helix pushing the faces closed. A simple way to check the belt deflection on the stand is to grab the outer face of the secondary and give a little counter clockwise pressure while grabbing the top of the belt between the two clutches and work it in the clockwise direction. This should allow the faces to close so you can see the actual belt deflection. Hope that makes sense to you?
snowhite
Pro
Yes I have worked with these shims on my older Yamaha so I know how they work, and yes it makes sense about the track being free and no load on the clutch! I'll go back and install 2 shims per bolt as I did, this will bring the belt to where it should be, thanks guys'.
