A good quality 530 O-ring chain will handle upwards of 200hp to the rear wheel.
My old '76 FHL is chain and when I restored it I went with a good quality O-ring chain.
The O-ring chain has rubber o-rings on each pin and each side. They are greased when made and have a long wear life. You only wipe them down occasionally with light oil and that's it.
I've got about 10k miles on my rebuild and I only adjusted the chain after about a 1k miles and no future adjustments have been needed.
I wouldn't swap to a chain on the M3W unless there were multiple belt failures and this were the only option. Regardless of the type of chain, they're noisy.
I still feel that getting the belt centered would be the first thing to do and forgo any sprays just to keep the belt dry and free of clingy debris.
