I did manage to get the Inner rotor kit to fit on my sons XL 100 ..Same crank taper so just had to drill holes to mount the back plate and then play for ages to get it timed up not knowing where the ignition fires..
The Coil failed after about 4 races and the threads pulled out of the ally parts but easy fix up .
all the wire fittings (spade terminals) are made from shit so cut them off and crimp good ones on .
The motor spins up great with the inner rotor being so small and light ...
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