All "Pro" versions
are tuned and tweaked by our motor technicians. All armatures have the balance
checked, shafts are checked for straightness. commutators are diamond
trued, magnets are charged to capacity, bushings aligned, and brush
hoods aligned. The motor is then assembled with the best combination
of brushes and springs, dyno tuned and tested. All motors have
the data stickers attached right to the can for your reference.