put a little (and i mean very little) bit of silicone lube on the shaft where it goes into the motor case and a dropin the middle ofthe back plastic piece where the rotor sticks through.
if your problem is slow starts… its just like that. They were designed for bitracers only. thats why the part no begins with S and not G. It requires a push start according to the tomy website. If that isnt your problem, then sorry for this irrelevant post! hehe