- A spark plug wrench
- A 10 mm socket and wrench
- A feeler gauge
- A screwdriver
- A timing light
1. Remove the spark plug wire from the spark plug.
2. Use the spark plug wrench to remove the spark plug from the cylinder head.
3. Insert the feeler gauge between the electrode gap on the spark plug. The gap should be 0.8-0.9mm. If it is not, use the screwdriver to adjust the gap.
4. Reinsert the spark plug and reattach the spark plug wire.
5. Use the 10 mm socket and wrench to loosen the stator base bolts located next to the flywheel.
6. Attach the timing light to the spark plug wire and point it at the flywheel mark.
7. Start the engine and let it run at idle.
8. Rotate the flywheel until the F mark is aligned with the pointer. This is the proper ignition timing for the Yamaha Breeze 125.
9. Tighten the stator base bolts.
10. Replace the covers and start the scooter.
