KTM 450 SMR Fork Seals
The KTM 450 SMR runs a 48 mm upside-down front fork.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 tube48 mm
- Fork typeUpside-down
| Kit | Years | Seal size | Replaces OEM |
|---|---|---|---|
| 55-131 | 2005–2007 | 48x58x9.5 | Yamaha 1C3-23145-L0-00 |
| 55-132 | 2013–2024 | 48x58x8.5 | Honda 51490-MEN-A31, Honda 51490-MEN-003, Kawasaki 92049-0074, Yamaha 1C3-23145-L0-00 |
| 57-105 | 2005–2024 | n/a | n/a |
| 55-159 | 2026 | n/a | n/a |
| 56-192 | 2026 | n/a | n/a |
| 56-146 | 2005–2007 | n/a | n/a |
| 56-147 | 2013–2024 | n/a | n/a |
| 38-6054 (bushings) | 2005–2007 | n/a | n/a |
Verified fork kits we stock for your KTM 450 SMR
Fork Seal Kit
Fork Oil Seal Kit — Gas-Gas EC250 (2012) + 174
$19.12
Fork Seal Kit
Fork Oil Seal Kit — Beta RR 2T 125 (2019-2023) +
$18.24
Fork Seal Kit
Fork Dust Seal Kit — Beta RR 2T 125 (2019-2023)
$19.50
Fork Seal Kit
Fork Oil & Dust Seal Kit — Gas-Gas EC125 — 5 Make...
$39.78
Fork Seal Kit
Fork Oil & Dust Seal Kit — Beta RR 2T 125
$40.57
Fork Bushing Kit
Fork Bushing Kit — Husaberg 450FC (2005) + 52
$61.64
Fork oil for your KTM 450 SMR
A fork-oil change on the KTM 450 SMR uses 4wt fork oil, about 380 ml per leg. Factory fill: WP/KTM Fork Oil SAE 4 (48601166S1). We don't stock 4wt yet, so the closest weight we carry (5wt) is shown below.
