I have just bought one of these. The weight difference In them I can't see making much of a difference to the performance. There is also no real difference in frictional values I would say. I would think that where the gains are got from is By having a lower emf. As the engine spins up this rotor acts as a brake which increases the faster it gets.
After looking at a spare standard one I have Liam I think what that guy told you about 2 phase and 3 phase is wrong.Purely because the rotor is being changed not the windings.
Interseting that this works with a Lipo battery, Those batteries charge a lot faster than ordinary ones maybe thats why it works for street purposes.
Last edited by im2fast2furious; 11-10-2012 at 12:13 PM.