SKF Fork Oil Seal 45x57x11 mm for HUSQVARNA, SUZUKI and HONDA 1989-1998

The SKF 45x57x11 mm OSB-45S fork oil seal is designed for HUSQVARNA CR 125, CR 250, CR 360, TC 350, TC 610, TE 350, WR 125, WR 250, WR 260, WR 360, WRK 125, WRK 250, WRK 260, HONDA CR 125, CR 250, CR 500 and SUZUKI RM 125, RM 250, RMX 250 from 1989 to 1998. The fork oil seal keeps the oil inside the fork leg while letting the inner tube slide. It is a wear item: dust, mud and impacts on the tubes eventually damage its lip, and the fork leaks.

Specifications

• Brand: SKF
• Manufacturer part number: OSB-45S
• EAN code: 8050040143764
• 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 P40FORK455179 · ATHENA P40FORK455096
• Fork oil : LIQUI MOLY 10W 500 ml
• Fork bushings : SKF · ATHENA

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:
HONDA CR 125 1991
HONDA CR 125 1990
HONDA CR 250 1991
HONDA CR 250 1990
HONDA CR 250 1989
HONDA CR 500 1991
HONDA CR 500 1990
HONDA CR 500 1989
HUSQVARNA CR 125 1994
HUSQVARNA CR 125 1993
HUSQVARNA CR 125 1992
HUSQVARNA CR 250 1994
HUSQVARNA CR 250 1993
HUSQVARNA CR 250 1992
HUSQVARNA CR 360 1994
HUSQVARNA CR 360 1993
HUSQVARNA CR 360 1992
HUSQVARNA TC 350 1994
HUSQVARNA TC 350 1993
HUSQVARNA TC 350 1992
HUSQVARNA TC 610 1994
HUSQVARNA TC 610 1993
HUSQVARNA TC 610 1992
HUSQVARNA TE 350 1994
HUSQVARNA TE 350 1993
HUSQVARNA TE 350 1992
HUSQVARNA WR 125 1994
HUSQVARNA WR 125 1993
HUSQVARNA WR 125 1992
HUSQVARNA WR 250 1994
HUSQVARNA WR 250 1993
HUSQVARNA WR 250 1992
HUSQVARNA WR 260 1993
HUSQVARNA WR 260 1992
HUSQVARNA WR 360 1994
HUSQVARNA WR 360 1993
HUSQVARNA WR 360 1992
HUSQVARNA WRK 125 1994
HUSQVARNA WRK 125 1993
HUSQVARNA WRK 125 1992
HUSQVARNA WRK 250 1994
HUSQVARNA WRK 250 1993
HUSQVARNA WRK 250 1992
HUSQVARNA WRK 260 1994
HUSQVARNA WRK 260 1993
HUSQVARNA WRK 260 1992
SUZUKI RM 125 1995
SUZUKI RM 125 1994
SUZUKI RM 125 1993
SUZUKI RM 125 1992
SUZUKI RM 125 1991
SUZUKI RM 250 1995
SUZUKI RM 250 1994
SUZUKI RM 250 1993
SUZUKI RM 250 1992
SUZUKI RM 250 1991
SUZUKI RMX 250 1998
SUZUKI RMX 250 1997
SUZUKI RMX 250 1996
SUZUKI RMX 250 1995
SUZUKI RMX 250 1994
SUZUKI RMX 250 1993
SUZUKI RMX 250 1992
SUZUKI RMX 250 1991