The Lesters take stock drum and sprocket carrier.
Kawi mags have push in bearings, I believe some models have no retainers. There are at least 3 versions used on Kawasakis. First LTD used real Morris mags, then their own similar wheels appeared, by at least 2 makers, one is Enkei, the other maybe Asahi? If you are seeking a set of Kawi mags, check carefully as the machined off area differs between those makers. That and later mags take discs with huge center holes.
Morris mags have detachable sideplates, both sides that hold the bearings, and did not come with drums, although some Amercan model fitment used factory bolt on drums.