Yamaha DT400 Fork Seals
The Yamaha DT400 runs a 34 mm conventional front fork, oil seal 34x46x10.5.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 tube34 mm
- Oil seal size34x46x10.5
- Fork typeConventional
| Kit | Years | Seal size | Replaces OEM |
|---|---|---|---|
| 55-133 | 1975–1978 | 34x46x10.5 | n/a |
| 56-179 | 1975–1976 | n/a | n/a |
| 57-163 | 1975–1976 | n/a | n/a |
Verified fork kits we stock for your Yamaha DT400
Fork Seal Kit
Fork Oil Seal Kit — Kawasaki KH400 (1974-1978) +
$19.12
Fork Seal Kit
Fork Oil & Dust Seal Kit — Yamaha DT250
$40.57
Fork Seal Kit
Fork Dust Seal Kit — Yamaha DT250 (1972-1976) +
$21.73
Fork oil for your Yamaha DT400
A fork-oil change on the Yamaha DT400 uses 10wt fork oil. Factory fill: SAE10W (KYB G10 / equiv).
