PROX Crankshaft Bearing 25x52x15mm for HUSQVARNA FS 450, TC 85, KTM EXCF 350, MX 125, HUSABERG FE 350, FE 501 and GAS GAS MC 85

PROX offers this engine bearing for HUSQVARNA FC 350, FC 450, FE 350, FS 450, TC 85, KTM EXC 125, EXC 125 MARZOCCHI/OHLINS, EXCF 350, GS 125, MX 125, HUSABERG FE 350, FE 450 IE, FE 501 and GAS GAS MC 85 1987-2025. 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 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

• PROX crankshaft bearing
• For an OEM equivalent renewing
• Manufacturer part number: 23.NJ205

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 : ATHENA P400207850001 · ATHENA P400270900088
• 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:
GAS GAS MC 85 2025
GAS GAS MC 85 2024
GAS GAS MC 85 2023
GAS GAS MC 85 2022
GAS GAS MC 85 2021
HUSABERG FE 350 2014
HUSABERG FE 350 2013
HUSABERG FE 450 IE 2014
HUSABERG FE 501 2014
HUSABERG FE 501 2013
HUSABERG FE 501 2000
HUSABERG FE 501 1999
HUSABERG FE 501 1998
HUSABERG FE 501 1997
HUSABERG FE 501 1996
HUSABERG FE 501 1995
HUSQVARNA FC 350 2019
HUSQVARNA FC 350 2018
HUSQVARNA FC 350 2017
HUSQVARNA FC 350 2016
HUSQVARNA FC 350 2015
HUSQVARNA FC 350 2014
HUSQVARNA FC 450 2019
HUSQVARNA FC 450 2018
HUSQVARNA FC 450 2017
HUSQVARNA FC 450 2016
HUSQVARNA FC 450 2015
HUSQVARNA FC 450 2014
HUSQVARNA FE 350 2019
HUSQVARNA FE 350 2018
HUSQVARNA FE 350 2017
HUSQVARNA FE 350 2016
HUSQVARNA FE 350 2015
HUSQVARNA FE 350 2014
HUSQVARNA FE 450 2019
HUSQVARNA FE 450 2018
HUSQVARNA FE 450 2017
HUSQVARNA FE 450 2016
HUSQVARNA FE 450 2015
HUSQVARNA FE 450 2014
HUSQVARNA FE 501 2019
HUSQVARNA FE 501 2018
HUSQVARNA FE 501 2017
HUSQVARNA FE 501 2016
HUSQVARNA FE 501 2015
HUSQVARNA FE 501 2014
HUSQVARNA FS 450 2021
HUSQVARNA FS 450 2020
HUSQVARNA FS 450 2019
HUSQVARNA FS 450 2018
HUSQVARNA FS 450 2017
HUSQVARNA FS 450 2016
HUSQVARNA FS 450 2015
HUSQVARNA TC 85 2024
HUSQVARNA TC 85 2023
HUSQVARNA TC 85 2022
HUSQVARNA TC 85 2021
HUSQVARNA TC 85 2020
HUSQVARNA TC 85 2019
HUSQVARNA TC 85 2018
HUSQVARNA TC 85 2017
HUSQVARNA TC 85 2016
HUSQVARNA TC 85 2015
HUSQVARNA TC 85 2014
KTM EXC 125 1997
KTM EXC 125 1996
KTM EXC 125 1995
KTM EXC 125 1994
KTM EXC 125 MARZOCCHI/OHLINS 1997
KTM EXC 125 MARZOCCHI/OHLINS 1996
KTM EXC 125 MARZOCCHI/OHLINS 1995
KTM EXC 125 MARZOCCHI/OHLINS 1994
KTM EXCF 350 2019
KTM EXCF 350 2018
KTM EXCF 350 2017
KTM EXCF 350 2016
KTM EXCF 350 2015
KTM EXCF 350 2014
KTM EXCF 350 2013
KTM EXCF 350 2012
KTM GS 125 1992
KTM GS 125 1991
KTM GS 125 1990
KTM GS 125 1989
KTM GS 125 1988
KTM GS 125 1987
KTM MX 125 1993
KTM MX 125 1992
KTM MX 125 1991
KTM MX 125 1990
KTM MX 125 1989
KTM MX 125 1988
KTM MX 125 1987
KTM SX 105 2006
KTM SX 125 1997
KTM SX 125 1996
KTM SX 125 1995
KTM SX 125 1994