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M3x3 screw
M3x10 screw
NO.5 Main Drive Gear and Brushless Motor Assembly.
(1) Fit the main drive gear onto the drive shaft, and tighten the fixing
screw on the flat position.
(2) Fit the brushless motor to the back pulley block, move it up and down
until the main drive gear and motor mesh smoothly, then tighten the
fixing screw to secure.
Motor gear
Main driven gear