PROX engine bearing 63/28 C3 – 28 × 68 × 18 mm for HONDA CR 250 R, YAMAHA YZ 250

Check before ordering

• Bearing: 63/28 C3
• Dimensions (inner × outer × width): 28 × 68 × 18 mm

PROX offers this engine bearing for HONDA CR 250 R, YAMAHA YZ 250, KAWASAKI KX 250 and SUZUKI RM 250 from 1978 to 2024. 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 PROX?

ProX uses Koyo or NTN bearings, largely made in Japan in OEM factories, with the original internal clearance (C3 / C4).

When should you replace the bearings?

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

• Application: Crankshaft
• ProX bearings are made in major bearing manufacturers' factories, mainly in Japan
• All bearings are made to OEM specifications for optimum quality and performance

Cross-Mania tip: Heat the cases to remove and fit the bearings without forcing them, and replace the oil seals at the same time.

Also needed with this part

• Complete engine gasket kit : MOOSE · PROX
• 2-stroke oil : LIQUI MOLY 1 L 3065 · LIQUI MOLY 1 L 3063

Compatibility

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

Fits:
HONDA CR 250 R 2007
HONDA CR 250 R 2006
HONDA CR 250 R 2005
HONDA CR 250 R 2004
HONDA CR 250 R 2003
HONDA CR 250 R 2002
HONDA CR 250 R 2001
HONDA CR 250 R 2000
HONDA CR 250 R 1999
HONDA CR 250 R 1998
HONDA CR 250 R 1997
HONDA CR 250 R 1996
HONDA CR 250 R 1995
HONDA CR 250 R 1994
HONDA CR 250 R 1993
HONDA CR 250 R 1992
HONDA CR 250 R 1991
HONDA CR 250 R 1990
HONDA CR 250 R 1989
HONDA CR 250 R 1988
HONDA CR 250 R 1987
HONDA CR 250 R 1986
HONDA CR 250 R 1985
HONDA CR 250 R 1984
HONDA CR 250 R 1983
HONDA CR 250 R 1982
HONDA CR 250 R 1981
HONDA CR 250 R 1979
HONDA CR 250 R 1978
HONDA CR 500 R 2001
HONDA CR 500 R 2000
HONDA CR 500 R 1999
HONDA CR 500 R 1998
HONDA CR 500 R 1997
HONDA CR 500 R 1996
HONDA CR 500 R 1995
HONDA CR 500 R 1994
HONDA CR 500 R 1993
HONDA CR 500 R 1992
HONDA CR 500 R 1991
HONDA CR 500 R 1990
HONDA CR 500 R 1989
HONDA CR 500 R 1988
HONDA CR 500 R 1987
HONDA CR 500 R 1986
HONDA CR 500 R 1985
HONDA CR 500 R 1984
HONDA TRX 200 D 1997
HONDA TRX 200 D 1996
HONDA TRX 200 D 1995
HONDA TRX 200 D 1994
HONDA TRX 200 D 1993
HONDA TRX 200 D 1992
HONDA TRX 200 D 1991
HONDA TRX 200 SX 1987
HONDA TRX 200 SX 1986
HONDA TRX 250 R 1989
HONDA TRX 250 R 1988
HONDA TRX 250 R 1987
HONDA TRX 250 X 1992
HONDA TRX 250 X 1991
HONDA TRX 250 X 1988
HONDA TRX 250 X 1987
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 KXF 250 2X4 1988
KAWASAKI KXF 250 2X4 1987
SUZUKI RM 250 2004
SUZUKI RM 250 2003
SUZUKI RM 250 2002
SUZUKI RM 250 2001
SUZUKI RM 250 2000
SUZUKI RM 250 1999
SUZUKI RM 250 1998
SUZUKI RM 250 1997
SUZUKI RM 250 1996
SUZUKI RM 250 1995
SUZUKI RM 250 1994
YAMAHA WR 250 1997
YAMAHA WR 250 1996
YAMAHA WR 250 1995
YAMAHA WR 250 1994
YAMAHA WR 250 1993
YAMAHA WR 250 1992
YAMAHA WR 250 1991
YAMAHA YZ 250 2024
YAMAHA YZ 250 2023
YAMAHA YZ 250 2022
YAMAHA YZ 250 2021
YAMAHA YZ 250 2020
YAMAHA YZ 250 2019
YAMAHA YZ 250 2018
YAMAHA YZ 250 2017
YAMAHA YZ 250 2016
YAMAHA YZ 250 2015
YAMAHA YZ 250 2014
YAMAHA YZ 250 2013
YAMAHA YZ 250 2012
YAMAHA YZ 250 2011
YAMAHA YZ 250 2010
YAMAHA YZ 250 2009
YAMAHA YZ 250 2008
YAMAHA YZ 250 2007
YAMAHA YZ 250 2006
YAMAHA YZ 250 2005
YAMAHA YZ 250 2004
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 YZ 250 1995
YAMAHA YZ 250 1994
YAMAHA YZ 250 1993
YAMAHA YZ 250 1992
YAMAHA YZ 250 1991
YAMAHA YZ 250 1990
YAMAHA YZ 250 1989
YAMAHA YZ 250 1988
YAMAHA YZ 250 X 2024
YAMAHA YZ 250 X 2023
YAMAHA YZ 250 X 2022
YAMAHA YZ 250 X 2021
YAMAHA YZ 250 X 2020
YAMAHA YZ 250 X 2019
YAMAHA YZ 250 X 2018
YAMAHA YZ 250 X 2017
YAMAHA YZ 250 X 2016