Yamaha BW80 Fork Seals
The Yamaha BW80 runs a 26 mm conventional front fork, oil seal 26x37x10.5.Every kit here is verified by the manufacturer to fit this exact bike. Fork seals can share a size and still not seat in a different fork, so we only list what is confirmed for your bike.
- Fork tube26 mm
- Oil seal size26x37x10.5
- Fork typeConventional
| Kit | Years | Seal size | Replaces OEM |
|---|---|---|---|
| 55-100 | 1986–1990 | 26x37x10.5 | n/a |
Verified fork kits we stock for your Yamaha BW80
Fork oil for your Yamaha BW80
A fork-oil change on the Yamaha BW80 uses 10wt fork oil. Factory fill: OE ATF/10W-30 engine oil (pre-fork-oil era); modern 10wt.














