Tongsheng TSDZ2 Motor strip & blue gear replacement & Removal of rounded allen head bolts.

One way bearing on the blue gear started to slip occasionally after about 3.5k miles. Time to strip down and check/replace. As can happen often, the allen head retaining studs for the outer casing were seized and ended up rounding the heads. This demosntrates a method I have used before to remove them. The Non-drive side casing had to be removed to allow the motor to slide out of the BB for inspection.