Crankshaft Bearing Kit KTM EXC 300 300cc 2004 2005

Why Choose This Crankshaft Bearing Kit for Your KTM 300 EXC?

The crankshaft main bearings are among the most critical components in your KTM 300 two-stroke engine. They support extreme RPMs, high loads, and the punishing conditions of enduro trails, rocky terrain, and technical single-track riding. Over time, these bearings experience wear from dirt, moisture ingress, inadequate lubrication during startup, and general high-rev abuse — leading to increased vibration, power loss, unusual noises, or even catastrophic engine failure.

This All Balls Racing Crankshaft Bearing Kit (SKU: 24-1098) addresses these issues head-on with high-quality Japanese Koyo bearings and advanced sealing technology. Koyo is a trusted name in precision engineering, widely regarded in the powersports community for superior quality comparable to or better than stock OEM bearings.

Key Features and Benefits:

• Genuine Koyo Precision Crank Bearings — Manufactured to tight tolerances for smooth operation, reduced friction, and extended service life under high-speed and high-load conditions typical of the KTM 300 EXC.
• Double Lip Seals with Contact PTFE Area — These advanced seals provide superior protection against dirt, water, and debris while minimizing drag. The PTFE (Teflon) contact area enhances sealing efficiency and dramatically reduces wear on the crankshaft pin.
• Dry Start Tolerance — Engineered to withstand initial startup without immediate lubrication, offering extra protection during cold starts or after long storage periods — a common issue that causes premature bearing failure in two-stroke dirt bikes.
• Direct Fit Replacement — Plug-and-play compatibility for 2004 KTM EXC 300 and 2005 KTM EXC 300 models. No modifications required.
• Complete Kit — Includes the necessary precision crank bearings (typically 1 high-speed radial ball bearing + 1 cylindrical roller bearing) and high-quality double-lip crank seals for a full bottom-end refresh.

Crankshaft Bearing Kit KTM EXC 300 300cc 2004 2005