The same thing happened to me during a race at Anglesey. The belt then tried to eat it’s way through the shock absorber
I don’t have HVH and found that the back plate to the bevel box was bent and pulling away from the lower cross tube at the welds. This is something worth checking out!!!
In my case I got MMC to repair, but the new welds weren’t up to the job. I fitted the Bleazey BB mounting kit to sort the problem
