adjusted the slipper clutch because it would squeal on slight inclines and rough surface. took it for a test run. ran amazing, good starts and no whines. took it on a packed atv trail ran 20ft turned around and got stuck in a small trench reversed out and had no forward or reverse after. smelled like burning plastic. unplugged and turned things off. motor was warm not hot, battery was cold, and esc was cool. battery had good charge left and esc was responding to trigger and wheels. no response from motor. spun both wheels to see if motor was locked, spun but rough on pinion and spur. backed clutch off one more full turn( two full turns from tight). turned rc on, got the motor to spin 1/8 turn and saw spark inside motor through small breather hole. ill rip the motor out today and see if it turns without tension. if no response from motor ill invest in the side winder 3 brushless and esc combo from CC. also i read that titan motors cant be rebuilt.