NTN Crankshaft Bearing 35x80x21mm for YAMAHA XTZ 660 TENERE, YFM 660 GRIZZLY 4WD, YFM 660 RAPTOR 2WD and HONDA XL 500 S

NTN offers this engine bearing for YAMAHA XTZ 660 TENERE, YFM 660 GRIZZLY 4WD, YFM 660 GRIZZLY CAMO 4WD, YFM 660 RAPTOR 2WD, YXR 660 RHINO 4WD and HONDA XL 500 S 1979-2008. 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 NTN?

NTN, the Japanese bearing maker founded in 1918, is the brand chosen by engine specialists such as ProX for their crankshaft bearing kits.

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

• Manufacturer part number: 6307C3

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 : see the selection
• 4-stroke engine oil : MOTUL 10W50 · LIQUI MOLY 10W40 1 L

Compatibility

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

Fits:
HONDA XL 500 S 1981
HONDA XL 500 S 1980
HONDA XL 500 S 1979
YAMAHA XTZ 660 TENERE 1996
YAMAHA XTZ 660 TENERE 1995
YAMAHA XTZ 660 TENERE 1994
YAMAHA XTZ 660 TENERE 1993
YAMAHA XTZ 660 TENERE 1992
YAMAHA XTZ 660 TENERE 1991
YAMAHA YFM 660 GRIZZLY 4WD 2008
YAMAHA YFM 660 GRIZZLY 4WD 2007
YAMAHA YFM 660 GRIZZLY 4WD 2006
YAMAHA YFM 660 GRIZZLY 4WD 2005
YAMAHA YFM 660 GRIZZLY 4WD 2004
YAMAHA YFM 660 GRIZZLY 4WD 2003
YAMAHA YFM 660 GRIZZLY 4WD 2002
YAMAHA YFM 660 GRIZZLY CAMO 4WD 2008
YAMAHA YFM 660 GRIZZLY CAMO 4WD 2007
YAMAHA YFM 660 GRIZZLY CAMO 4WD 2006
YAMAHA YFM 660 GRIZZLY CAMO 4WD 2005
YAMAHA YFM 660 RAPTOR 2WD 2005
YAMAHA YFM 660 RAPTOR 2WD 2004
YAMAHA YFM 660 RAPTOR 2WD 2003
YAMAHA YFM 660 RAPTOR 2WD 2002
YAMAHA YFM 660 RAPTOR 2WD 2001
YAMAHA YXR 660 RHINO 4WD 2007
YAMAHA YXR 660 RHINO 4WD 2006
YAMAHA YXR 660 RHINO 4WD 2005
YAMAHA YXR 660 RHINO 4WD 2004