PROX crankshaft bearing and seal kit for KTM EXC-F 350, SX-F 250 and HUSQVARNA FC 250, FC 350 from 2016 to 2018

PROX offers this crankshaft bearing and seal kit for KTM EXC-F 350, SX-F 250 and HUSQVARNA FC 250, FC 350 from 2016 to 2018. 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-F, Husqvarna FC 2016-2022):

• Racing: every 100 h.
• Leisure: no KTM figure; have the wear checked at every top-end rebuild.
• KTM EXC-F, Husqvarna FE 2017-2023: racing: every 70 h.

Specifications and fitting tips

• Application: Crankshaft
• Built to exact OEM specifications for maximum performance and durability
• Include all bearings/seals required to replace the component

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:
HUSQVARNA FC 250 2018
HUSQVARNA FC 250 2017
HUSQVARNA FC 250 2016
HUSQVARNA FC 350 2018
HUSQVARNA FC 350 2017
HUSQVARNA FC 350 2016
HUSQVARNA FX 350 2018
HUSQVARNA FX 350 2017
KTM EXC-F 350 2018
KTM EXC-F 350 2017
KTM EXC-F 350 2016
KTM SX-F 250 2018
KTM SX-F 250 2017
KTM SX-F 250 2016
KTM SX-F 350 2018
KTM SX-F 350 2017
KTM SX-F 350 2016
KTM XC-F 250 2017
KTM XC-F 250 2016
KTM XC-F 250 I 2018
KTM XC-F 350 I 2018
KTM XC-F 350 I 2017
KTM XC-F 350 I 2016