Yamaha YZ125 Fork Seals
Fork specs for the Yamaha YZ125 vary by year (see the table below).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.
| Years | Fork tube | Fork |
|---|---|---|
| 1974–1988 | 43 mm | Kayaba (KYB) |
| 1989–1995 | 43 mm | Kayaba (KYB) |
| 1996–2004 | 46 mm | Kayaba (KYB) |
| 2005–2021 | 48 mm | Kayaba (KYB) |
| 2022–2026 | 48 mm | Kayaba (KYB) |
| Kit | Years | Seal size | Replaces OEM |
|---|---|---|---|
| 55-102 | 1974–1975 | 30x40.5x10.5 | n/a |
| 55-109 | 1977–1980 | 36x48x11 | Kawasaki 92049-1226 |
| 55-112 | 1981–1983 | 38x50x10.5 | n/a |
| 55-117 | 1989–1990 | 41x53x8 | Aprilia 2B004402 |
| 55-120 | 1984–1985 | 43x54x11 | Ducati 34920261A, Ducati 34920211A |
| 55-122 | 1986–1995 | 43x55x10.5 | Yamaha 5VX-23145-00-00 |
| 55-126 | 1996–2003 | 46x58x9.5 | n/a |
| 55-132 | 2004–2025 | 48x58x8.5 | Honda 51490-MEN-A31, Honda 51490-MEN-003, Kawasaki 92049-0074, Yamaha 1C3-23145-L0-00 |
Verified fork kits we stock for your Yamaha YZ125
Fork Seal Kit
Fork Oil Seal Kit — Kawasaki KE100 (1976-2001) +
$18.24
Fork Seal Kit
Fork Oil Seal Kit — Honda XR200R (1984-2002) +
$19.12
Fork Seal Kit
Fork Oil Seal Kit — Ducati 750 F1 (1986-1989) +
$18.24
Fork Seal Kit
Fork Oil Seal Kit — Aprilia Dorsoduro 900
$18.24
Fork Seal Kit
Fork Oil Seal Kit — Tiger Sport 1200 (2017-2019)
$18.24
Fork Seal Kit
Fork Oil Seal Kit — Ducati Paul Smart 1000LE
$18.24
Fork Seal Kit
Fork Oil Seal Kit — Ducati Desert X (2023-2025)
$19.50
Fork Seal Kit
Fork Oil Seal Kit — Beta RR 2T 125 (2019-2023) +
$18.24
Fork oil for your Yamaha YZ125
A fork-oil change on the Yamaha YZ125 uses 5wt fork oil, about 500 ml per leg (oil level 135 mm). Factory fill: KYB 01M (~5wt).
Fork Oil
Liqui Moly Motorbike Fork Oil 5W Light — 1 Liter
$17.99
Fork Oil
Maxima Fork Oil 5W — 1 Liter
$13.99
Fork Oil
Maxima Fork Oil 5W — 16 oz
$7.99
