Dug the Flywheel out of my VR1A kit (waiting in the wings) to compare. It has the spokes rounded but larger Dia and larger shaft bore and also does Not have the eccentric feature machined on cyl side so it will not cross fit.
Notice VR1A looks freshly machined while my HM1 may have been on the shelf for several Months...you guys must be buying up all the VR1A's! [ Guests cannot view attachments ]