NTN Crankshaft Bearing 30x72x19mm for KTM LC4 620 ENDURO SUPER-COMP, LC4 620 ENDURO SX WP, LC4 640, LC4 640 ADVENTURE R

NTN offers this engine bearing for KTM LC4 620 ENDURO SUPER-COMP, LC4 620 ENDURO SX WP, LC4 620 SUPERMOTO SUPER-COMP, LC4 640, LC4 640 ADVENTURE R 1994-2006. 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 your KTM LC4 640?

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: NJ306EAT2XC3

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
• 4-stroke engine 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:
KTM EXC 250 1996
KTM LC4 620 COMPETITION 1999
KTM LC4 620 COMPETITION 1998
KTM LC4 620 ENDURO SUPER-COMP 2001
KTM LC4 620 ENDURO SUPER-COMP 2000
KTM LC4 620 ENDURO SUPER-COMP 1999
KTM LC4 620 ENDURO SUPER-COMP 1998
KTM LC4 620 ENDURO SUPER-COMP 1997
KTM LC4 620 ENDURO SUPER-COMP 1996
KTM LC4 620 ENDURO SUPER-COMP 1995
KTM LC4 620 ENDURO SUPER-COMP 1994
KTM LC4 620 ENDURO SX WP 1999
KTM LC4 620 ENDURO SX WP 1998
KTM LC4 620 ENDURO SX WP 1997
KTM LC4 620 ENDURO SX WP 1996
KTM LC4 620 ENDURO SX WP 1995
KTM LC4 620 ENDURO SX WP 1994
KTM LC4 620 ENDURO SXC WP 1997
KTM LC4 620 RALLYE 1997
KTM LC4 620 SUPERMOTO SUPER-COMP 2001
KTM LC4 620 SUPERMOTO SUPER-COMP 2000
KTM LC4 620 SUPERMOTO SUPER-COMP 1999
KTM LC4 620 SUPERMOTO SUPER-COMP 1998
KTM LC4 640 2006
KTM LC4 640 2005
KTM LC4 640 2004
KTM LC4 640 2003
KTM LC4 640 2002
KTM LC4 640 2001
KTM LC4 640 2000
KTM LC4 640 1999
KTM LC4 640 1998
KTM LC4 640 ADVENTURE 2006
KTM LC4 640 ADVENTURE 2005
KTM LC4 640 ADVENTURE 2004
KTM LC4 640 ADVENTURE 2003
KTM LC4 640 ADVENTURE R 2004
KTM LC4 640 ADVENTURE R 2003
KTM LC4 640 ADVENTURE R 2002
KTM LC4 640 ADVENTURE R 2001
KTM LC4 640 ADVENTURE R 2000
KTM LC4 640 ADVENTURE R 1999
KTM LC4 640 ADVENTURE R 1998
KTM LC4 660 RALLY 1997
KTM SX 250 1996