ATHENA Fork Oil Seal Kit 41x54x11 mm for HONDA, YAMAHA, SUZUKI and KAWASAKI 1983-2002

On HONDA NX 125, XL 600, XR 350, YAMAHA TT 350, KAWASAKI KDX 125 and SUZUKI TS 125 from 1983 to 2002, the ATHENA 41x54x11 mm P40FORK455054 fork oil seal kit fits in place of the original part. 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: ATHENA
• Manufacturer part number: P40FORK455054
• EAN code: 8050043263438
• 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?

Founded in 1973 near Vicenza, Athena is an Italian engine gasket specialist that has made its gaskets on its own production lines since day one, as well as a renowned manufacturer of pistons and cylinder kits. The brand supplies original equipment to manufacturers such as KTM, Ducati, Fantic, Piaggio and Triumph, and is a partner of the MXGP motocross world championship.

Spare parts and items to plan

• Fork dust seals : see the selection
• Fork oil : LIQUI MOLY 10W 500 ml
• Fork bushings : SHOWA · 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:
HONDA NX 125 2002
HONDA NX 125 1999
HONDA NX 125 1998
HONDA NX 125 1997
HONDA NX 125 1996
HONDA NX 125 1995
HONDA NX 125 1994
HONDA NX 125 1993
HONDA NX 125 1992
HONDA NX 125 1991
HONDA NX 125 1990
HONDA NX 125 1989
HONDA NX 125 1988
HONDA XL 600 1987
HONDA XL 600 1986
HONDA XL 600 1985
HONDA XR 350 1985
HONDA XR 350 1984
HONDA XR 350 1983
KAWASAKI KDX 125 1993
KAWASAKI KDX 125 1992
KAWASAKI KDX 125 1991
KAWASAKI KDX 125 1990
SUZUKI TS 125 1994
SUZUKI TS 125 1993
SUZUKI TS 125 1992
SUZUKI TS 125 1991
SUZUKI TS 125 1990
YAMAHA TT 350 1995
YAMAHA TT 350 1994
YAMAHA TT 350 1993
YAMAHA TT 350 1992
YAMAHA TT 350 1991
YAMAHA TT 350 1990
YAMAHA TT 350 1989
YAMAHA TT 350 1988
YAMAHA TT 350 1987
YAMAHA TT 350 1986
YAMAHA TT 350 1985