ATHENA Fork Oil Seal Kit 37x50x11 mm for HONDA CR 80, CRF 230, NX 250, XL 250, XL 500, XR 250, XR 500 and SUZUKI RM 85 1981-2023

The ATHENA 37x50x11 mm P40FORK455042 fork oil seal kit is designed for HONDA CR 80, CRF 230, NX 250, XL 250, XL 500, XR 250, XR 500 and SUZUKI RM 85 from 1981 to 2023. 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: ATHENA
• Manufacturer part number: P40FORK455042
• EAN code: 8055681307551
• Weight: 60 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 ATHENA?

Athena, an Italian company founded in 1973 near Vicenza, designs gaskets, pistons and cylinder kits for motorcycles. An OEM supplier to KTM, Ducati, Fantic, Piaggio and Triumph and a partner of the MXGP world championship, it develops its parts on the test bench and on the track with racing teams.

Spare parts and items to plan

• Fork dust seals : ATHENA
• Fork oil : LIQUI MOLY 10W 500 ml
• Fork bushings : SHOWA SHO-51037 · SHOWA SHO-50037

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 80 2002
HONDA CR 80 2001
HONDA CR 80 2000
HONDA CR 80 1999
HONDA CR 80 1998
HONDA CR 80 1997
HONDA CR 80 1996
HONDA CRF 230 2019
HONDA CRF 230 2017
HONDA CRF 230 2016
HONDA CRF 230 2015
HONDA CRF 230 2014
HONDA CRF 230 2013
HONDA CRF 230 2012
HONDA CRF 230 2011
HONDA CRF 230 2010
HONDA CRF 230 2009
HONDA CRF 230 2008
HONDA CRF 230 2007
HONDA CRF 230 2006
HONDA CRF 230 2005
HONDA CRF 230 2004
HONDA CRF 230 2003
HONDA NX 250 1990
HONDA NX 250 1989
HONDA NX 250 1988
HONDA XL 250 1990
HONDA XL 500 1984
HONDA XL 500 1983
HONDA XL 500 1982
HONDA XR 250 1982
HONDA XR 250 1981
HONDA XR 500 1982
HONDA XR 500 1981
SUZUKI RM 85 2023
SUZUKI RM 85 2022
SUZUKI RM 85 2021
SUZUKI RM 85 2020
SUZUKI RM 85 2019
SUZUKI RM 85 2018
SUZUKI RM 85 2017
SUZUKI RM 85 2016
SUZUKI RM 85 2015
SUZUKI RM 85 2014
SUZUKI RM 85 2013
SUZUKI RM 85 2012
SUZUKI RM 85 2011
SUZUKI RM 85 2010
SUZUKI RM 85 2008
SUZUKI RM 85 2007
SUZUKI RM 85 2006
SUZUKI RM 85 2005
SUZUKI RM 85 2004
SUZUKI RM 85 2003
SUZUKI RM 85 2002