PROX Fork Bushing Kit for YAMAHA YZ 125, YZ 250, YZF 250, YZF 426, YZF 450 1996-2003

On YAMAHA YZ 125, YZ 250, YZF 250, YZF 426, YZF 450 from 1996 to 2003, the PROX 39.160010 fork bushing kit fits in place of the original part. This kit contains the fork's guide bushings: the outer bushing, at the top of the fork leg, and the inner bushing, at the bottom of the tube. Their PTFE (Teflon) coating reduces friction; once worn, the bronze shows through, the fork binds and the oil seals wear out faster.

Specifications

• Brand: PROX
• Manufacturer part number: 39.160010

When to replace it?

• Grey coating worn through: the copper or bronze shows on the bushing.
• Play in the fork when you rock the bike back and forth with the front brake on.
• Fork that binds at the start of its stroke, oil seals that leak again and again.

Check the bushings every time you replace the oil seals or change the fork oil. Replace them as soon as the bronze shows over more than a quarter of their surface.

Fitting tips

1. Disassemble the fork leg following the manual and separate the outer tube from the inner tube.
2. Remove the old bushings without scratching their seats, and clean them.
3. Fit the new bushings with a suitable tool, then install new oil seals.
4. Reset the fork oil level as per the manual.

Why PROX?

ProX Racing Parts has been supplying engine and clutch parts to motocross riders since 1975, from its headquarters near Amsterdam. According to its catalogue, most of its parts are made in Japan, by manufacturers that also produce parts for the Japanese motorcycle makers.

Spare parts and items to plan

• Fork oil seals : ATHENA · SKF
• Fork oil : LIQUI MOLY 10W 500 ml
• Fork dust seals : ATHENA P40FORK455131 · ATHENA P40FORK455098

Frequently asked questions

Do I have to change both bushings?
Check the outer and inner bushings on both legs: they wear together. Replace all those that show bronze.

Compatibility

Check the exact model and year of your bike in the list below before ordering.

Fits:
YAMAHA YZ 125 2003
YAMAHA YZ 125 2002
YAMAHA YZ 125 2001
YAMAHA YZ 125 2000
YAMAHA YZ 125 1999
YAMAHA YZ 125 1998
YAMAHA YZ 125 1997
YAMAHA YZ 125 1996
YAMAHA YZ 250 2003
YAMAHA YZ 250 2002
YAMAHA YZ 250 2001
YAMAHA YZ 250 2000
YAMAHA YZ 250 1999
YAMAHA YZ 250 1998
YAMAHA YZ 250 1997
YAMAHA YZ 250 1996
YAMAHA YZF 250 2003
YAMAHA YZF 250 2002
YAMAHA YZF 250 2001
YAMAHA YZF 250 2000
YAMAHA YZF 250 1999
YAMAHA YZF 250 1998
YAMAHA YZF 250 1997
YAMAHA YZF 426 2003
YAMAHA YZF 426 2002
YAMAHA YZF 426 2001
YAMAHA YZF 426 2000
YAMAHA YZF 426 1999
YAMAHA YZF 426 1998
YAMAHA YZF 426 1997
YAMAHA YZF 450 2003
YAMAHA YZF 450 2002
YAMAHA YZF 450 2001
YAMAHA YZF 450 2000
YAMAHA YZF 450 1999
YAMAHA YZF 450 1998
YAMAHA YZF 450 1997