racer38 wrote:Your correct with a different flywheel, but main difference is the MC28 had an extra oil way from the 2 stroke oil pump (although the last year of MC21 had this too) to feed one of the main bearings directly. Can't remember which one exactly.
More minor changes are the generator has a shorter wire to plug it into the loom and the internal gearbox ratios are slightly different.
Gotcha, I assume this will be irrelevant if running premix? Or is it advisable to stick with the pump on the later models?
Other than that is it simply a case of switching the flywheels and swapping them over?