Yamaha WR400F Fork Seals
The Yamaha WR400F runs a 46 mm upside-down front fork, oil seal 46x58x9.5 (WP USD 48mm (KTM EXC/SX 1996-2007 era) + Sachs USD 48mm (Beta RR 2013-2023)).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 tube46 mm
- Oil seal size46x58x9.5
- Fork typeUpside-down
- ForkWP USD 48mm (KTM EXC/SX 1996-2007 era) + Sachs USD 48mm (Beta RR 2013-2023)
| Kit | Years | Seal size | Replaces OEM |
|---|---|---|---|
| 55-126 | 1998–2000 | 46x58x9.5 | n/a |
| 57-103 | 1998–2000 | n/a | n/a |
| 56-141 | 1998–2000 | n/a | n/a |
| 38-6010 (bushings) | 1998–2000 | n/a | n/a |
Verified fork kits we stock for your Yamaha WR400F
Fork Seal Kit
Fork Oil Seal Kit — Ducati Desert X (2023-2025)
$19.50
Fork Seal Kit
Fork Oil & Dust Seal Kit — Ducati Desert X
$39.78
Fork Bushing Kit
Fork Bushing Kit — Honda CR125R (1997-2007) + 16
$52.84
Fork oil for your Yamaha WR400F
A fork-oil change on the Yamaha WR400F uses 5wt fork oil. Factory fill: KYB 01M / Showa SS-05 (~5wt).
