Having recently purchased a M750 I have now completely stripped the bike to its component parts in readiness for a complete rebuild including some modern extras.
One of these updates is to fit a 749 swinging arm and suspension to the bike, now I am not unfamiliar to fitting things that are not meant to fit and my plan is to keep the forum updated for those of you who are interested in this sort of thing.
The to do list so far and a few pictures.
1, Machine casings to accept 749 swinging arm
2, Chain alignment is slightly out and this can be overcome by using the bush/spigot I made in the pictures or fitting the later output shaft which is longer
3, Re locate and adapt the frame suspension mount
4, Replace crank casing needle roller bearings with solid bushes as the bearings will be in the swinging arm.
5, The rear wheel alignment is fine but there are number of spacer/bearing and caliper mounting issues to overcome.