Belt drive fixed

Perhaps the motorcycle industry has missed something and has been using chains twice as heavy as bicycle chains for no reason.

Think of the weight saving when they start using kmc 510 chains on moto gp bikes!

However, the argument was that the carbon belt drive would stretch and the comparison between carbon belt drive and chain drive on similarly powered motorbikes still stands.
I was more saying you should be more worried about the belt stretching on your Trek than your motorbike but yes. Having said that, we are talking a very small amount of stretch, and nothing that will affect performance.

As for heaving chains on motorbikes, it's a good point and i'm trying to think why the use such heavy duty chains, maybe it just takes more stress than a bike chain? I.e a bike chain would stretch critically or fail within a couple of months of riding because you would do so many more K's.

double bollocks

Bollocks.

Physics, learn it.