PROX crankshaft bearing and seal kit for KTM SX 125, HUSQVARNA TC 125, GAS GAS MC 125 and HUSABERG TE 125 from 1998 to 2024

PROX offers this crankshaft bearing and seal kit for KTM SX 125, HUSQVARNA TC 125, GAS GAS MC 125 and HUSABERG TE 125 from 1998 to 2024. The crankshaft spins on two large bearings in the cases, protected by oil seals. They take all the engine’s force; after many hours they develop play and vibration appears.

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?

Unusual vibration, a deep knock that follows engine speed or play in the con-rod: the bottom end needs a rebuild.

Recommended hours for a bottom-end rebuild (manufacturer recommendation for the KTM SX, Husqvarna TC 125-300 2017-2022):

• Racing: every 40 h.
• Leisure: no KTM figure; have the wear checked at every top-end rebuild.
• KTM EXC 150 TPI, Husqvarna TE 150i 2020-2023: racing: every 40 h.

Specifications and fitting tips

• Application: Crankshaft
• Style: 2-stroke
• Built to exact OEM specifications for maximum performance and durability
• Includes all bearings/seals required to replace the component (unless otherwise stated)

Cross-Mania tip: Heat the cases to remove and fit the bearings without forcing them, and replace the oil seals at the same time.

Compatibility

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

Fits:
GAS GAS MC 125 2024
GAS GAS MC 125 2023
GAS GAS MC 125 2022
GAS GAS MC 125 2021
HUSABERG TE 125 2015
HUSABERG TE 125 2014
HUSABERG TE 125 2013
HUSABERG TE 125 2012
HUSQVARNA TC 125 2023
HUSQVARNA TC 125 2022
HUSQVARNA TC 125 2021
HUSQVARNA TC 125 2020
HUSQVARNA TC 125 2019
HUSQVARNA TC 125 2018
HUSQVARNA TC 125 2017
HUSQVARNA TC 125 2016
HUSQVARNA TC 125 2015
HUSQVARNA TC 125 2014
HUSQVARNA TE 125 2016
HUSQVARNA TE 125 2015
HUSQVARNA TE 125 2014
HUSQVARNA TE 150 2019
HUSQVARNA TE 150 2018
HUSQVARNA TE 150 2017
HUSQVARNA TE 150 I 2023
HUSQVARNA TE 150 I 2022
HUSQVARNA TE 150 I 2021
HUSQVARNA TE 150 I 2020
HUSQVARNA TX 125 2019
HUSQVARNA TX 125 2018
HUSQVARNA TX 125 2017
KTM EXC 125 2016
KTM EXC 125 2015
KTM EXC 125 2014
KTM EXC 125 2013
KTM EXC 125 2012
KTM EXC 125 2011
KTM EXC 125 2010
KTM EXC 125 2009
KTM EXC 125 2008
KTM EXC 125 2007
KTM EXC 125 2006
KTM EXC 125 2005
KTM EXC 125 2004
KTM EXC 125 2003
KTM EXC 125 2002
KTM EXC 125 2001
KTM EXC 125 2000
KTM EXC 125 1999
KTM EXC 125 1998
KTM EXC 150 TPI 2023
KTM EXC 150 TPI 2022
KTM EXC 150 TPI 2021
KTM EXC 150 TPI 2020
KTM EXC 200 2016
KTM EXC 200 2015
KTM EXC 200 2014
KTM EXC 200 2013
KTM EXC 200 2012
KTM EXC 200 2011
KTM EXC 200 2010
KTM EXC 200 2009
KTM EXC 200 2008
KTM EXC 200 2007
KTM EXC 200 2006
KTM EXC 200 2005
KTM EXC 200 2004
KTM EXC 200 2003
KTM EXC 200 2002
KTM EXC 200 2001
KTM EXC 200 2000
KTM EXC 200 1999
KTM EXC 200 1998
KTM SX 125 2023
KTM SX 125 2022
KTM SX 125 2021
KTM SX 125 2020
KTM SX 125 2019
KTM SX 125 2018
KTM SX 125 2017
KTM SX 125 2016
KTM SX 125 2015
KTM SX 125 2014
KTM SX 125 2013
KTM SX 125 2012
KTM SX 125 2011
KTM SX 125 2010
KTM SX 125 2009
KTM SX 125 2008
KTM SX 125 2007
KTM SX 125 2006
KTM SX 125 2005
KTM SX 125 2004
KTM SX 125 2003
KTM SX 125 2002
KTM SX 125 2001
KTM SX 125 2000
KTM SX 125 1999
KTM SX 125 1998
KTM SX 144 2008
KTM SX 150 2022
KTM SX 150 2021
KTM SX 150 2020
KTM SX 150 2019
KTM SX 150 2018
KTM SX 150 2017
KTM SX 150 2016
KTM SX 150 2015
KTM SX 150 2014
KTM SX 150 2013
KTM SX 150 2012
KTM SX 150 2011
KTM SX 150 2010
KTM SX 150 2009
KTM SX 200 2004
KTM SX 200 2003
KTM XC-W 125 2019
KTM XC-W 125 2018
KTM XC-W 125 2017
KTM XC-W 150 2019
KTM XC-W 150 2018
KTM XC-W 150 2017