• 1 1x4 solid red
• 1 1x4 red w/ hole
• 1 1x10 red w/ hole
• 1 1x8 red w/ hole
• 2 10 space axles
• 1 8 space axle
• 2 8 tooth gears
• 2 40 tooth gears
• 1 24 tooth gear
• 1 16 tooth gear
• 1 wide axle stop
• 1 small axle stop (small belt drive connector)

Mount the red pieces on the underside of the motor mount. Thread the axles through the holes in the red Legos. Make sure the axles spin freely i.e. they have little friction.

Repeat for both left and right side.