Things You'll Need
Instructions
Remove the four cap head screws that hold the engine against the mounting plate.
Unscrew the button-head screw securing the pipe hanger to the rear body mount.
Remove the engine and exhaust system to open up access to the spur gear.
Use a 2.5 mm hex wrench to loosen the three screws on the slipper clutch. Slide the spur gear from the slipper shaft. If it is tight and difficult to remove, use a small flat-head screwdriver to apply pressure from behind it.
Slide on the replacement spur gear, then reinstall the three hex screws. Loosen the two horizontal engine mount screws. Place a sheet of paper between the spur and clutch bell gears to ensure proper meshing. While pinching the paper between the gears, tighten the two horizontal mounting screws.
Install the engine and exhaust system, then tighten the single button-head screw. Reinstall the four cap head screws to secure the engine to the mounting panel.