Ball and Ramp - Automotive Dictionary

The “ball and ramp” mechanism used in motorcycle clutches as a form of a ramp-type clutch release mechanism. Here’s how it typically works:

Components: It consists of two stamped plates: one fixed to the clutch basket and the other to the clutch hub. Between these plates are small balls and ramps.
Operation: When the clutch lever is pulled (actuated by the clutch cable), it rotates a cam or mechanism connected to the plate attached to the clutch basket. This rotation causes the balls to move up the ramps.
Disengagement: As the balls climb the ramps, they force the plates apart. This action separates the clutch plates, disengaging the clutch. This allows the motorcycle’s engine to run independently of the transmission, enabling gear changes.
Advantages: The ball and ramp mechanism provides a progressive and smooth engagement/disengagement of the clutch, contributing to smoother shifts and extended clutch life compared to simpler mechanisms.

This type of mechanism is common in motorcycles and is valued for its reliability and ease of operation.