SKF Fork Oil Seal 41x53.7x7.5 mm for YAMAHA, KAWASAKI, HONDA, SUZUKI and APRILIA 1981-2025

The SKF 41x53.7x7.5 mm OSB-41K fork oil seal is designed for YAMAHA DT 125, WR 125, XT 600, YZ 125, SUZUKI DR 650, RM 125, RM 250, RMX 250, HONDA CR 250, CR 450, XR 250, APRILIA RX 125, TUAREG 125 and KAWASAKI KLR 650 from 1981 to 2025. Fitted at the top of the fork leg, under the dust seal, the oil seal keeps the fork sealed. A leak lowers the oil level, the damping changes and oil can run onto the brake disc.

Specifications

• Brand: SKF
• Manufacturer part number: OSB-41K
• EAN code: 8050040143627
• Weight: 30 g

When to replace it?

• Film of oil on the inner tube after a few fork strokes.
• Oil traces on the fork leg, the caliper or the brake disc.
• Fork that becomes softer on one side.

Before replacing a leaking seal, clean under its lip: a trapped grain of sand is sometimes enough to cause the leak. If it still leaks, replace the seals on both legs. Measure your seal (inside diameter, outside diameter and height) or check the original part number: the size is in the name.

Fitting tips

1. Drain and disassemble the fork leg following the manual, then remove the dust seal, the circlip and the old seal.
2. Check the fork bushings and the condition of the inner tube: a scratch or a rust spot will cut a new seal.
3. Protect the end of the tube (plastic bag), oil the lip and drive the seal in straight with a seal driver of the right diameter.
4. Refit the circlip and a new dust seal, then reset the fork oil level.

Why SKF?

SKF is renowned for its fork seals, among the most durable in motocross according to the American magazine Motocross Action, which notes that the WP forks on KTMs are fitted with them as original equipment. In its Dual Compound range, the brand combines two rubber compounds moulded together: a tough green dust wiper and a softer red sealing lip, both reinforced by a metal insert.

Spare parts and items to plan

• Fork dust seals : ATHENA P40FORK455226 · ATHENA P40FORK455189
• Fork oil : LIQUI MOLY 10W 500 ml
• Fork bushings : SKF · INNTECK

Frequently asked questions

Do I have to change both seals?
Yes: they have the same age and the same mileage. Replace both oil seals and, ideally, both dust seals.

Why is my new seal leaking?
Most often because of a scratched or pitted tube, a lip turned back during installation, or worn bushings that let the tube develop play.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
APRILIA RX 125 1991
APRILIA RX 125 1990
APRILIA TUAREG 125 1991
APRILIA TUAREG 125 1990
HONDA CR 250 1981
HONDA CR 450 1981
HONDA XR 250 1998
HONDA XR 250 1997
HONDA XR 250 1996
HONDA XR 250 1995
HONDA XR 250 1994
HONDA XR 250 1993
HONDA XR 250 1992
HONDA XR 250 1991
HONDA XR 250 1990
HONDA XR 250 1989
HONDA XR 250 1988
HONDA XR 250 1987
HONDA XR 250 1986
KAWASAKI KLR 650 2025
KAWASAKI KLR 650 2024
KAWASAKI KLR 650 2023
KAWASAKI KLR 650 2022
KAWASAKI KLR 650 2021
KAWASAKI KLR 650 2020
KAWASAKI KLR 650 2019
KAWASAKI KLR 650 2018
KAWASAKI KLR 650 2017
KAWASAKI KLR 650 2016
KAWASAKI KLR 650 2015
KAWASAKI KLR 650 2014
KAWASAKI KLR 650 2013
KAWASAKI KLR 650 2012
KAWASAKI KLR 650 2011
KAWASAKI KLR 650 2010
KAWASAKI KLR 650 2009
KAWASAKI KLR 650 2008
SUZUKI DR 650 1996
SUZUKI DR 650 1995
SUZUKI DR 650 1994
SUZUKI DR 650 1993
SUZUKI DR 650 1992
SUZUKI DR 650 1991
SUZUKI DR 650 1990
SUZUKI RM 125 1990
SUZUKI RM 250 1990
SUZUKI RM 250 1989
SUZUKI RMX 250 1990
SUZUKI RMX 250 1989
YAMAHA DT 125 1992
YAMAHA DT 125 1991
YAMAHA DT 125 1990
YAMAHA DT 125 1989
YAMAHA DT 125 1988
YAMAHA WR 125 2013
YAMAHA WR 125 2012
YAMAHA WR 125 2011
YAMAHA WR 125 2010
YAMAHA WR 125 2009
YAMAHA XT 600 2002
YAMAHA XT 600 2001
YAMAHA XT 600 2000
YAMAHA XT 600 1999
YAMAHA XT 600 1998
YAMAHA XT 600 1997
YAMAHA XT 600 1996
YAMAHA XT 600 1995
YAMAHA XT 600 1993
YAMAHA XT 600 1992
YAMAHA XT 600 1991
YAMAHA XT 600 1990
YAMAHA XT 600 1989
YAMAHA XT 600 1988
YAMAHA XT 600 1987
YAMAHA XT 600 1986
YAMAHA XT 600 1985
YAMAHA XT 600 1984
YAMAHA YZ 125 1990
YAMAHA YZ 125 1989