Short Description: Restore the precision and smoothness of your transmission with this high-duty primary shaft ball bearing. A critical component for eliminating gearbox noise and ensuring reliable power transfer from the engine to the wheels.

Technical Specifications:

• Compatibility: Dnepr MT-11 (and compatible models)
• Manufacturer Code / SKU: 303 (303K2)
• Part Type: Transmission / Gearbox

Purpose and Role in the Motorcycle (based on the original manual):
This single-row radial ball bearing is specifically engineered to support the gearbox primary shaft. In the Dnepr MT-11 transmission, the primary shaft is a heavy-load component that is made integral with the rims of the 1st, 2nd, and reverse gears. The bearing's primary function is to ensure the shaft rotates with minimal friction while maintaining strict axial and radial alignment within the gearcase. When this bearing begins to wear, it typically manifests as increased whining noise in the gearbox, vibrations during gear transitions, or "noise and jerks" during shifting. Because the primary shaft is the first point of torque entry into the transmission, a worn bearing can lead to misalignment of the gear mesh, potentially causing premature wear of the gear teeth and the primary shaft gland.

Benefits of Buying:

• Exact match to factory specifications: Designed to meet the original OEM standards for the Dnepr MT-11, ensuring a perfect fit without modification.
• Reduced Mechanical Wear: By eliminating shaft play, this bearing protects the internal gear teeth from uneven loading and prevents costly gearbox housing damage.
• Enhanced Ride Quality: Replacing worn bearings restores the quiet, smooth operation of the transmission, significantly improving the overall driving experience.