Belt slipping?

[mtotguy]

If I do a hole shot and I'm getting good traction I can hear a bit of rumbling somewhere under me. It's not the track ratcheting. I know that sound and the track is tight enough. I've also adjusted the chain tension (it needed 3 turns) but it still makes the noise. The belt deflection looks good. It's not a grinding noise. It's not terribly loud. It doesn't do it from a float. I'm thinking my belt could be slipping. Has anybody else heard this?

 

[NOS-PRO]

If you are hooked up track wise, you can slip the belt. You will also hear this noise if you are trail riding, slam on the brakes locking up the track, come to a complete stop then mash the throttle again. Belts need a few miles to fully break in. This happened to me when I would race asphalt during the spring, summer and fall months..... Now I trail ride the new belts for 100 miles or 150 before I take them off and use them on my asphalt sleds.

 

[RX ROB]

Track is rubbing the side of tunnel.

 

[mtotguy]

Track is rubbing the side of tunnel.

Why would it only do it when I holeshot and only when I'm hooking up well?

 

[TurboJamie]

Track is rubbing the side of tunnel.

Why would it only do it when I holeshot and only when I'm hooking up well?

Chassis twist from all the torque.

 

[RX ROB]

Try adjusting track to more center see if that fixes it?

 

[mtotguy]

That seemed to do the trick. There isn't much clearence between the tunnel and the track.