PROX engine bearing 6306 C3 – 30 × 72 × 19 mm for YAMAHA XT 225, KAWASAKI KX 500 E

Check before ordering

• Bearing: 6306 C3
• Dimensions (inner × outer × width): 30 × 72 × 19 mm

PROX offers this engine bearing for YAMAHA XT 225, KAWASAKI KX 500 E, SUZUKI DR 350 and HONDA XL 250 S from 1979 to 2007. 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 : PROX · MOOSE
• 2-stroke oil : LIQUI MOLY 10W40 1 L · MOTUL 10W50

Compatibility

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

Fits:
HONDA XL 250 S 1983
HONDA XL 250 S 1982
HONDA XL 250 S 1981
HONDA XL 250 S 1980
HONDA XL 250 S 1979
KAWASAKI KX 500 A 1984
KAWASAKI KX 500 A 1983
KAWASAKI KX 500 B 1986
KAWASAKI KX 500 B 1985
KAWASAKI KX 500 C 1987
KAWASAKI KX 500 D 1988
KAWASAKI KX 500 E 2004
KAWASAKI KX 500 E 2003
KAWASAKI KX 500 E 2002
KAWASAKI KX 500 E 2001
KAWASAKI KX 500 E 2000
KAWASAKI KX 500 E 1999
KAWASAKI KX 500 E 1998
KAWASAKI KX 500 E 1997
KAWASAKI KX 500 E 1996
KAWASAKI KX 500 E 1995
KAWASAKI KX 500 E 1994
KAWASAKI KX 500 E 1993
KAWASAKI KX 500 E 1992
KAWASAKI KX 500 E 1991
KAWASAKI KX 500 E 1990
KAWASAKI KX 500 E 1989
SUZUKI DR 350 1998
SUZUKI DR 350 1997
SUZUKI DR 350 1996
SUZUKI DR 350 1995
SUZUKI DR 350 1994
SUZUKI DR 350 1993
SUZUKI DR 350 1992
SUZUKI DR 350 1991
SUZUKI DR 350 1990
SUZUKI DR 350 SE 1999
SUZUKI DR 350 SE 1998
SUZUKI DR 350 SE 1997
SUZUKI DR 350 SE 1996
SUZUKI DR 350 SE 1995
SUZUKI DR 350 SE 1994
YAMAHA XT 225 2007
YAMAHA XT 225 2006
YAMAHA XT 225 2005
YAMAHA XT 225 2004
YAMAHA XT 225 2003
YAMAHA XT 225 2002
YAMAHA XT 225 2001
YAMAHA XT 225 2000
YAMAHA XT 225 1999
YAMAHA XT 225 1998
YAMAHA XT 225 1997
YAMAHA XT 225 1996
YAMAHA XT 225 1995
YAMAHA XT 225 1994
YAMAHA XT 225 1993
YAMAHA XT 225 1992
YAMAHA YZ 465 1981
YAMAHA YZ 465 1980
YAMAHA YZ 490 1990
YAMAHA YZ 490 1989
YAMAHA YZ 490 1988
YAMAHA YZ 490 1987
YAMAHA YZ 490 1986
YAMAHA YZ 490 1985
YAMAHA YZ 490 1984
YAMAHA YZ 490 1983
YAMAHA YZ 490 1982