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So hoping someone can assist. I am working on an MRP Pro-110, and the drive gear (PN 11-4065)doesn’t fit (too big diameter) to the idler gear. I believe it requires a 46t 48p gear. When I compare with my original Pro-110, the gear is larger (26mm vs 25.45mm), yet has the same tooth count and I believe the same pitch. I imagine this has something to do with metric vs imperial, but haven’t run into before.

Thanks limestang

the guy I found that knows a lot about those Pro110 is Crunchy550 on ebay. Sorry I don't have his email handy but he knows those cars well, as well as the AKM knockoff, if you get stuck Id recommend asking @matt1ptkn but he hasn't logged in for quite a while.

Thank you Jeff!
-Mark