ATHENA Engine Bearing for KAWASAKI KX 125, KX 250, HONDA CR 125, CR 250, CR 500 and YAMAHA YZ 125, YZ 250 1980-2002

ATHENA offers this engine bearing for KAWASAKI KX 125, KX 250, HONDA CR 125, CR 250, CR 500 and YAMAHA YZ 125, YZ 250 1980-2002. The engine’s shafts run on ball or roller bearings in the cases. They carry heavy loads at high revs and eventually develop play.

What is this bearing made of?

Races and balls (or rollers) in hardened chrome steel, 100Cr6 type: a very hard steel that withstands the fatigue of millions of engine revolutions.

• Open bearing: unsealed, it is lubricated and cooled by the engine oil; clean oil is its best protection.
• C3 / C4 internal clearance: slightly more clearance than normal for a hot engine’s expansion; always refit the original clearance.
• Limit: it dislikes dust and old oil; running short of oil destroys it within minutes.

Why choose ATHENA?

Athena, founded in 1973 by Giovanni Mancassola near Vicenza and based in Alonte (Italy), designs gaskets, pistons and cylinder kits; it supplies original equipment to manufacturers such as KTM, Ducati, Fantic and Triumph.

When should you replace the bearings on your KAWASAKI KX 125?

On competition bikes the main bearings are replaced at every bottom-end rebuild, at the hours recommended by the manufacturer. With the cases open, spin each bearing by hand: the slightest rough spot means it must go.

Specifications and fitting tips

• Type: 6004/2RSC3
• Manufacturer part number: MS200420120M3K

Spare parts and items to plan

• Complete engine gasket kit : MOOSE 808457MSE · MOOSE 811457MSE
• Engine oil seals : ALL BALLS · PROX
• Gearbox oil : LIQUI MOLY 10W30 1 L · LIQUI MOLY 1 L

Compatibility

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

Fits:
HONDA CR 125 1999
HONDA CR 125 1998
HONDA CR 125 1997
HONDA CR 125 1996
HONDA CR 125 1995
HONDA CR 125 1994
HONDA CR 125 1993
HONDA CR 125 1992
HONDA CR 125 1991
HONDA CR 125 1990
HONDA CR 250 1999
HONDA CR 250 1998
HONDA CR 250 1997
HONDA CR 250 1996
HONDA CR 250 1995
HONDA CR 250 1994
HONDA CR 250 1993
HONDA CR 250 1992
HONDA CR 250 1991
HONDA CR 250 1990
HONDA CR 500 2002
HONDA CR 500 2001
HONDA CR 500 2000
HONDA CR 500 1999
HONDA CR 500 1998
HONDA CR 500 1997
HONDA CR 500 1996
HONDA CR 500 1995
HONDA CR 500 1994
HONDA CR 500 1993
HONDA CR 500 1992
HONDA CR 500 1991
HONDA CR 500 1990
KAWASAKI KX 125 2002
KAWASAKI KX 125 2001
KAWASAKI KX 125 2000
KAWASAKI KX 125 1999
KAWASAKI KX 125 1998
KAWASAKI KX 125 1997
KAWASAKI KX 125 1996
KAWASAKI KX 125 1995
KAWASAKI KX 125 1994
KAWASAKI KX 125 1993
KAWASAKI KX 125 1992
KAWASAKI KX 125 1991
KAWASAKI KX 125 1990
KAWASAKI KX 125 1989
KAWASAKI KX 125 1988
KAWASAKI KX 125 1987
KAWASAKI KX 125 1986
KAWASAKI KX 125 1985
KAWASAKI KX 125 1984
KAWASAKI KX 125 1983
KAWASAKI KX 125 1982
KAWASAKI KX 125 1981
KAWASAKI KX 125 1980
KAWASAKI KX 250 2002
KAWASAKI KX 250 2001
KAWASAKI KX 250 2000
KAWASAKI KX 250 1999
KAWASAKI KX 250 1998
KAWASAKI KX 250 1997
KAWASAKI KX 250 1996
KAWASAKI KX 250 1995
KAWASAKI KX 250 1994
KAWASAKI KX 250 1993
KAWASAKI KX 250 1992
KAWASAKI KX 250 1991
KAWASAKI KX 250 1990
KAWASAKI KX 250 1989
KAWASAKI KX 250 1988
KAWASAKI KX 250 1987
KAWASAKI KX 250 1986
KAWASAKI KX 250 1985
YAMAHA YZ 125 1997
YAMAHA YZ 125 1996
YAMAHA YZ 125 1995
YAMAHA YZ 125 1991
YAMAHA YZ 125 1990
YAMAHA YZ 125 1989
YAMAHA YZ 125 1988
YAMAHA YZ 125 1987
YAMAHA YZ 125 1986
YAMAHA YZ 250 1998
YAMAHA YZ 250 1997
YAMAHA YZ 250 1996
YAMAHA YZ 250 1989
YAMAHA YZ 250 1988
YAMAHA YZ 250 1987
YAMAHA YZ 250 1986
YAMAHA YZ 250 1982