ATHENA Fork Oil Seal Kit 34x46x10.5 mm for YAMAHA, SUZUKI, HUSABERG and KAWASAKI 1970-2010

The ATHENA 34x46x10.5 mm P40FORK455028 fork oil seal kit is designed for YAMAHA DT 250, DT 360, DT 400, XT 500, YZ 100, YZ 125, YZ 250, YZ 360, HUSABERG FE 570, FS 570, KAWASAKI KX 450 and SUZUKI TS 250 from 1970 to 2010. 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: P40FORK455028
• EAN code: 8055681307957
• Weight: 50 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 P40FORK455131 · ATHENA P40FORK455098
• Fork oil : LIQUI MOLY 10W 500 ml
• Fork bushings : KYB · SKF

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:
HUSABERG FE 570 2010
HUSABERG FS 570 2010
KAWASAKI KX 450 1973
SUZUKI TS 250 1976
SUZUKI TS 250 1975
SUZUKI TS 250 1974
SUZUKI TS 250 1973
SUZUKI TS 250 1972
SUZUKI TS 250 1971
SUZUKI TS 250 1970
YAMAHA DT 250 1978
YAMAHA DT 250 1977
YAMAHA DT 250 1976
YAMAHA DT 250 1975
YAMAHA DT 250 1974
YAMAHA DT 360 1975
YAMAHA DT 360 1974
YAMAHA DT 400 1978
YAMAHA DT 400 1977
YAMAHA DT 400 1976
YAMAHA DT 400 1975
YAMAHA XT 500 1975
YAMAHA XT 500 1974
YAMAHA XT 500 1973
YAMAHA YZ 100 1977
YAMAHA YZ 100 1976
YAMAHA YZ 125 1976
YAMAHA YZ 250 1975
YAMAHA YZ 250 1974
YAMAHA YZ 360 1975
YAMAHA YZ 360 1974