ProX 26.640001 Countershaft Seal Kit KTM Bearings & Seals - 125/150SX 250SX-F

The ProX 26.640001 Countershaft Seal Kit is a complete, upgrade-grade replacement for the countershaft oil seal assembly on compatible KTM dirt bikes and ATVs. Whenever the front sprocket is removed for inspection or replacement, the countershaft oil seal behind it should be checked — this seal operates under high load and is constantly exposed to dirt, water, and debris, making it a common source of oil leaks over time.

Kit Includes:

• Upgraded oil seal — improved design for longer service life compared to OEM
• Hardened steel bushing — increased wear resistance on the high-load countershaft
• O-ring, snap ring, or lock washer — all applicable hardware included

Key Features:

• Developed as a complete upgrade replacement for OEM countershaft seal components
• All-in-one kit includes every component needed for a full countershaft seal service
• Manufactured to OEM quality standards in ISO-certified facilities
• Compatible with a wide range of KTM SX, SX-F, EXC, and EXC-F models, as well as select Husaberg, Husqvarna, Gas Gas, and Polaris ATV applications
• OEM Reference No: 000.50.000.941

Ideal for routine maintenance or leak repair, the ProX 26.640001 countershaft seal kit is a straightforward, cost-effective upgrade that keeps your drivetrain sealed and protected ride after ride.