[200sx]

Evening all

I'm having a problem with this motor in my gt12. It's definitely the motor because I've tried different batteries and speed controls.

The motor feels gutless. It reaches a decent top speed but has no acceleration. It accelerates at the same rate with half throttle as it does with full throttle. The motor is mildly warm, about 35d after five mins. Geared it anywhere between 55 and 70mmpr, lower mmpr gives slightly more punch but destroys top speed as expected. Adjusting motor timing does little to change it.

Any ideas what could cause this?