Fork Oil Seals
The fork oil seal allows a fine film of oil to lubricate the fork sliding surface.
- The oil film is more visible after continuous high-speed compression and rebound movement.
- Due to greater lubrication needs, larger forks have a greater amount of oil film than smaller forks.
Check Oil Leak
- Observe oil ring.
- Wipe fork clean.
- Ride motorcycle over bumpy road or complete six braking events.
- See Figure 1. Check fork slider tube for oil.
- If a normal oil/dust film (1, 2) is present, there is no leak.
- If an oil run or drip (3) is present, perform procedure two or three more times to confirm oil leak.
| 1 | Normal oil/dust film |
| 2 | Normal oil/dust film |
| 3 | Drip |
Figure 1. Front Forks