GX200 / Hisun swap (flywheel question)

#1
Swapping a couple modified GX200s for the stock hisun motors on two Coleman BT200x. Realized the GX200 doesn’t have charging coils and flywheel magnets. Are flywheels interchangeable between the two motors? I see some people saying the tapers are the same. Also noticed that one GX200 has a shaved flywheel key (advance timing??) and the other appeared to have no key at all... should I leave the shaved key and put an OEM key in the shaft that’s missing one?
 
#3
I build clones, and Predators all the time without keys in the flywheels. I set the timing with a degree wheel, and lap the flywheel to the crank. It isn't the key that holds the flywheel on, it is the tapered shaft, and pressure from the starter nut. As far as a charging system goes, I don't know if anyone makes a magneto setup for a pred.
 
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