WOSSNER engine bearing 6203 C3 – 17 × 40 × 12 mm for YAMAHA PW 50, KTM SX 50 and GAS GAS MC 50 from 1982 to 2021

Check before ordering

• Bearing: 6203 C3
• Dimensions (inner × outer × width): 17 × 40 × 12 mm

WOSSNER offers this engine bearing for YAMAHA PW 50, KTM SX 50 and GAS GAS MC 50 from 1982 to 2021. 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 WOSSNER?

Wössner, the German company founded by a former racer, forges its own parts: design and manufacturing are controlled end to end.

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
• Outside diameter: 40 mm
• Inside diameter: 17 mm
• Length: 12 mm
• Precision bearings

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 808601MSE · MOOSE 811601MSE
• 2-stroke oil : LIQUI MOLY 1 L · LIQUI MOLY 4 L

Compatibility

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

Fits:
GAS GAS MC 50 2021
KTM SX 50 2017
KTM SX 50 2016
KTM SX 50 2015
KTM SX 50 2014
KTM SX 50 2013
KTM SX 50 2012
KTM SX 50 2011
KTM SX 50 2010
KTM SX 50 2009
KTM SX 50 2008
KTM SX 50 2007
KTM SX 50 2006
YAMAHA PW 50 2016
YAMAHA PW 50 2015
YAMAHA PW 50 2014
YAMAHA PW 50 2013
YAMAHA PW 50 2012
YAMAHA PW 50 2011
YAMAHA PW 50 2010
YAMAHA PW 50 2008
YAMAHA PW 50 2007
YAMAHA PW 50 2006
YAMAHA PW 50 2005
YAMAHA PW 50 2004
YAMAHA PW 50 2003
YAMAHA PW 50 2002
YAMAHA PW 50 2001
YAMAHA PW 50 2000
YAMAHA PW 50 1999
YAMAHA PW 50 1998
YAMAHA PW 50 1997
YAMAHA PW 50 1996
YAMAHA PW 50 1995
YAMAHA PW 50 1994
YAMAHA PW 50 1993
YAMAHA PW 50 1992
YAMAHA PW 50 1991
YAMAHA PW 50 1988
YAMAHA PW 50 1987
YAMAHA PW 50 1986
YAMAHA PW 50 1985
YAMAHA PW 50 1983
YAMAHA PW 50 1982