ill have a go, seen as tho im up far too early
rear wheels. the h1 swingarm does not accept the h2 or l model rear wheel spidle, it is too narrow, and the rear brake hanger is also smaller than the h2 and l models. The h1 rear wheel itself, has larger cush drive and sprocket mounting, so not interchangeable with h2 or l.
Im sure if you wanted to use h2/l model rear wheel on a h1, you could put h1 bearings in later wheel,and use h1 spacers..altho untested yet.
Or, imh, swap the h1 swingarm with a h2 one- a few around cheap.