Originally Posted by Solara

Exactly like I said...why would you use STOCK motor parts on a mod motor..? I have not done that because I don't see why a stock parts (slower in general) will work better in MOD motor construction....try to slow down a mod motor does not make sense to me. Use higher turn motor instead.

But to answer that question, again, the CORE position of stock rotor does not match the MOD motor's stator...to have them to align, you have to shim it differently, and it is not something like 1 or 2mm offset. It is not possible. The rotor will FIT inside the mod motor but I doubt it will be any better (you can shim the rotor by using the stock rotor shims and give that a try...you can technically do that but I just cannot answer you it is any better.)