X-5 squared shredded belt and pulley!

[Fiddybux]

Hi all,

Was at the Southport meet today and was getting some good advice on how to best setup my X-5 squared. Everything suggested worked a treat, which had me leading the pack in the B final until the car ground to a halt.

At first the general consensus was that I had stripped the rear diff, but having opened the car up it seems that the diff is intact (all good), but the belt was in bits, yellow bits everywhere, the fibres inside the belt had wrapped around the belt tension pulley and the slipper pulley was completey rounded.

The slipper pulley is not the crappy stock one either, it was the small Losi pulley from the centre shaft in the XX4. Now it is good only for the bin!

So, I want to know if anyone has had this before, what caused it and how I can avoid in future?

I wonder if I had the belt too tight and this is what caused it? It felt okay to me, skipping slightly under hard braking only...and it is meant to skip a little.

I also wonder if I should have blunted the edges of all the pulleys and diff gears when assembling to help prevent belt damage. I will certainly do this now with a small file.

Any ideas anyone?

Cheers all.