[mcguyver]

The problem is likely in the windings themselves. I've "fixed" a couple ICS Turbo 2000 already. The problem I found was at the pole ends where the wired turns from one side to another. ICS had about 4 or 5 wraps at these points, and they were squashed together pretty good. I pried them all apart, leaving a small air-gap between them. It fixed the problem and made a dud motor run like new. No parts involved, and no dead spots after.

But, to do it, you need to remove the pinion gear, and pry open the motor casing tabs that lock onto the rear end bell (the hard part to do). It took me about an hour to it last time.