PROX engine bearing 63/28 C4 – 28 × 68 × 18 mm for TM RACING EN 250, EN 300, MX 250, MX 300 from 2001 to 2014

Check before ordering

• Bearing: 63/28 C4
• Dimensions (inner × outer × width): 28 × 68 × 18 mm

PROX offers this engine bearing for TM RACING EN 250, EN 300, MX 250, MX 300 from 2001 to 2014. 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 your TM RACING MX 250?

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

• 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:
TM RACING EN 250 2014
TM RACING EN 250 2013
TM RACING EN 250 2012
TM RACING EN 250 2011
TM RACING EN 250 2010
TM RACING EN 250 2009
TM RACING EN 250 2008
TM RACING EN 250 2007
TM RACING EN 250 2006
TM RACING EN 250 2005
TM RACING EN 250 2004
TM RACING EN 300 2014
TM RACING EN 300 2013
TM RACING EN 300 2012
TM RACING EN 300 2011
TM RACING EN 300 2010
TM RACING EN 300 2009
TM RACING EN 300 2008
TM RACING EN 300 2007
TM RACING EN 300 2006
TM RACING EN 300 2005
TM RACING EN 300 2004
TM RACING MX 250 2014
TM RACING MX 250 2013
TM RACING MX 250 2012
TM RACING MX 250 2011
TM RACING MX 250 2010
TM RACING MX 250 2009
TM RACING MX 250 2008
TM RACING MX 250 2007
TM RACING MX 250 2006
TM RACING MX 250 2005
TM RACING MX 250 2004
TM RACING MX 250 2003
TM RACING MX 250 2002
TM RACING MX 250 2001
TM RACING MX 300 2014
TM RACING MX 300 2013
TM RACING MX 300 2012
TM RACING MX 300 2011
TM RACING MX 300 2009
TM RACING MX 300 2008
TM RACING MX 300 2007
TM RACING MX 300 2006
TM RACING MX 300 2005
TM RACING MX 300 2004
TM RACING MX 300 2003
TM RACING MX 300 2002
TM RACING MX 300 2001