| Clarke,
If you run a kitaco inner rotor kit on anything over an 88 you risk a clutch explosion. If the bike is a manual kit then it won't happen. Thats where you may have seen a 124 with a irk on it. And Honda 50s you need better facts about kits and there specs. 108 has a 52mm bore and 51mm stroke. 124 has a 54mm bore and a 54mm stroke. I have seen many IRK problems with even 88cc kits and also seen 108's self destruct with IRK's in them. My suggestion is get your stock flywheel lightened or get an outer rotor kit from a mini specialist like BOXY.
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Raced minis for 10 years now so I guess that makes me an OG (original guy)
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