Wössner Pistons Top End Bearing

The Wössner Pistons Top End Bearing is a needle roller bearing that fits in the small end of the connecting rod. It is also called a wrist pin bearing or piston pin bearing. It supports the wrist pin, so the piston and connecting rod can pivot smoothly under the heavy loads and high temperatures of a running engine. It is a direct replacement for worn top end bearings in motorcycle, ATV and other powersports engines.

Key Features:

• Needle roller design for low friction and smooth wrist pin movement
• Precision-manufactured to fit the wrist pin and connecting rod small end bore
• Replaces worn small end bearings during a top end rebuild or piston replacement
• Sold in several sizes, so you can match the bearing to your wrist pin and rod specification

Wössner is known for forged performance pistons and engine components. Fitting a new top end bearing with a new piston and wrist pin helps keep the top end tight and reliable. Confirm the inner diameter, outer diameter and width of each bearing before you order.