ATHENA Fork Oil Seal Kit 50x59.6x7/10.5 mm for KTM EGS, EXC, GS, LC4, MX, SX 250, 300, 360, 380, 400, 520, 620 1995-1999

The ATHENA 50x59.6x7/10.5 mm P40FORK455077 fork oil seal kit is designed for KTM EGS 250, EGS 360, EGS 380, EGS 620, EXC 250, EXC 300, EXC 360, EXC 380, EXC 400, EXC 520, EXC 620, GS 250, LC4 620, MX 250, SX 250, SX 300, SX 360, SX 380, SX 400, SX 520, SX 620 from 1995 to 1999. 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: P40FORK455077
• EAN code: 8055681307926
• 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 P40FORK455140 · ATHENA P40FORK455126
• Fork oil : LIQUI MOLY 10W 500 ml
• Fork bushings : INNTECK · 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:
KTM EGS 250 1999
KTM EGS 250 1998
KTM EGS 360 1997
KTM EGS 360 1995
KTM EGS 380 1998
KTM EGS 620 1998
KTM EGS 620 1997
KTM EGS 620 1996
KTM EXC 250 1999
KTM EXC 250 1998
KTM EXC 300 1999
KTM EXC 300 1998
KTM EXC 360 1997
KTM EXC 360 1995
KTM EXC 380 1999
KTM EXC 380 1998
KTM EXC 400 1999
KTM EXC 520 1999
KTM EXC 620 1997
KTM GS 250 1999
KTM LC4 620 1999
KTM LC4 620 1998
KTM LC4 620 1997
KTM MX 250 1999
KTM SX 250 1999
KTM SX 250 1998
KTM SX 300 1999
KTM SX 300 1998
KTM SX 360 1997
KTM SX 360 1996
KTM SX 360 1995
KTM SX 380 1999
KTM SX 380 1998
KTM SX 400 1999
KTM SX 520 1999
KTM SX 620 1997