SC18 hot motor

Ok, so the SC18's drivetrain I've heard is rather tight,leading to a hot stock motor.so I loosened the belts and the mesh and installed a new reedy stump puller (brushed,I know....) ran it through one 6 cell nimh and it got to 230'F!!
The batteries were at 87, and the esc at 110. I really don't know what to do.I used the suggested gearing that reedy had on the box,should I still gear down? Any other ideas? And for reference,the SC18 is a beltdrive version of an RC18T,all the same gearing and diffs.--Josh