When I inherited my Maxima, this was the closest I could get to replace the worn out belt it was sporting:
https://www.accu.co.uk/en/mxl-type-t...XL-4-77-640-08 If I recall correctly, it's a tooth or two longer in length, but runs just fine - the tension adjustment can take the slack out with travel to spare.
I was not aware of different pitches available, but there is much I don't know about this buggy. Mine is NOT the two speed in case that makes a difference?
I can't help with the shock or wheels.
Will