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Bicycle engine clutch gear replacement (Part 5: Bearing assembly)
Supplies: New bearings (optional), grease (wheel bearing grease, CV joint grease, or molybdenum grease), degreaser, block of wood
Parts: clutch gear (disc), clutch pads
Tools: arbor press or vise, drill, large socket
- Thoroughly clean the bearings and bearing race with degreaser
- Apply enough grease to the race to make it sticky.
- Pro tip: If you leave the bearings and race in the magentic part tray for a while, they will become magnetized and will almost assemble themselves.
- Install each of the bearings into the race.
- When all bearings are installed, thoroughly coat them in grease. Get it right up in there into their private parts.
- Seat the race into the new clutch disc.
- Make a tool like the one shown.
- Sandwich the assembly tool, clutch gear, bearing race, flywheel and a large socket together.
- Use an arbor press or vise to press the assemblies into place.
- Pro tip: Preheat the bearing race with a hot air gun to make it expand before assembly.
- Wipe away all excess grease.
- Install the clutch pads into the clutch disc.
- Use a wooden block and hammer to seat the pads, if necessary.
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