PROX engine bearing for BETA RR 350 EFI, KTM EXC 450, HUSQVARNA FE 450 and HUSABERG FE 450 from 2008 to 2023

PROX offers this engine bearing for BETA RR 350 EFI, KTM EXC 450, HUSQVARNA FE 450 and HUSABERG FE 450 from 2008 to 2023. 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

• 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

• Complete engine gasket kit : ATHENA P400270850019 · ATHENA P400270850021
• 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:
BETA RR 350 2014
BETA RR 350 2013
BETA RR 350 2012
BETA RR 350 2011
BETA RR 350 EFI 2023
BETA RR 350 EFI 2022
BETA RR 350 EFI 2021
BETA RR 350 EFI 2020
BETA RR 350 EFI 2019
BETA RR 350 EFI 2018
BETA RR 350 EFI 2017
BETA RR 350 EFI 2016
BETA RR 350 EFI 2015
BETA RR 390 2015
BETA RR 390 EFI 2022
BETA RR 390 EFI 2021
BETA RR 390 EFI 2020
BETA RR 390 EFI 2019
BETA RR 390 EFI 2018
BETA RR 390 EFI 2017
BETA RR 390 EFI 2016
BETA RR 400 2014
BETA RR 400 2013
BETA RR 400 2012
BETA RR 400 2011
BETA RR 400 2010
BETA RR 430 2015
BETA RR 430 EFI 2022
BETA RR 430 EFI 2021
BETA RR 430 EFI 2020
BETA RR 430 EFI 2019
BETA RR 430 EFI 2018
BETA RR 430 EFI 2017
BETA RR 430 EFI 2016
BETA RR 450 2014
BETA RR 450 2013
BETA RR 450 2012
BETA RR 450 2011
BETA RR 450 2010
BETA RR 480 2015
BETA RR 480 EFI 2022
BETA RR 480 EFI 2021
BETA RR 480 EFI 2020
BETA RR 480 EFI 2019
BETA RR 480 EFI 2018
BETA RR 480 EFI 2017
BETA RR 480 EFI 2016
BETA RR 498 2014
BETA RR 498 2013
BETA RR 498 2012
BETA RR 520 2011
BETA RR 520 2010
BETA RR-S 390 2023
BETA RR-S 390 2022
BETA RR-S 390 2021
BETA RR-S 390 2020
BETA RR-S 390 2019
BETA RR-S 390 2018
BETA RR-S 390 2017
BETA RR-S 430 2023
BETA RR-S 430 2022
BETA RR-S 430 2021
BETA RR-S 430 2020
BETA RR-S 430 2019
BETA RR-S 430 2018
BETA RR-S 430 2017
HUSABERG FE 450 2014
HUSABERG FE 450 2013
HUSABERG FE 501 2014
HUSABERG FE 501 2013
HUSQVARNA FC 450 2015
HUSQVARNA FC 450 2014
HUSQVARNA FE 450 2016
HUSQVARNA FE 450 2015
HUSQVARNA FE 450 2014
HUSQVARNA FE 501 2016
HUSQVARNA FE 501 2015
HUSQVARNA FE 501 2014
HUSQVARNA FE 501 S 2016
HUSQVARNA FE 501 S 2015
HUSQVARNA FS 450 2015
KTM EXC 400 2011
KTM EXC 400 2010
KTM EXC 400 2009
KTM EXC 450 2016
KTM EXC 450 2015
KTM EXC 450 2014
KTM EXC 450 2013
KTM EXC 450 2012
KTM EXC 500 2016
KTM EXC 500 2015
KTM EXC 500 2014
KTM EXC 500 2013
KTM EXC 500 2012
KTM EXC-R 450 2008
KTM EXC-R 530 2010
KTM EXC-R 530 2009
KTM EXC-R 530 2008
KTM SMR 450 2014
KTM SMR 450 2013
KTM SX-F 250 2014
KTM SX-F 250 2013
KTM SX-F 450 2015
KTM SX-F 450 2014
KTM SX-F 450 2013