do it man. rather than just remove whole magnets tho just remove alot of material from the magneto, make it similar to a peugeot or puch magneto.
lighter cranks will help the moby out ALOT. mobys are soooo excessively heavy on the crank its ridiculous. they are so heavy that they often will snap cranks at higher speeds cuz they rn't balanced perf.
every little bit helps. I removed my clutch completely from the crank and have the lightest variator u can get and its one of the hardest ripping mopeds ever. I haven't met a moped yet that can out accelerate it, tops out even with a gila puch at 18x36 and gets 70mpg.
skinny light ass wheels, light ass frame, light as rider, light ass motor, hella light transmission, light magneto + lots of power