CLUTCH PUMP

Hydraulic cylinder (clutch release/pump) for converting a wire-type clutch to a hydraulic-type (oil clutch)
Most motorcycle clutches are "wire-type" pulled by a wire, but this is a core part for converting it to a "hydraulic-type" that moves with fluid (oil) pressure like a brake. (A part that converts hydraulic pressure into physical movement on the engine side)

Benefits of installation

Lighter clutch operation
Because it uses hydraulic power (Pascal's principle), it allows for lighter operation of the clutch lever, especially when it has become heavy due to the installation of a high-lift cam or reinforced clutch.

Maintenance-free (compared to wire)
There is no longer any concern about "seizure due to rust" or "fraying/breakage due to friction" as with wire types. Regular fluid changes are necessary, but the feel remains stable for a long period.

Points to note (during installation)

Bracket fabrication may be required for each vehicle model
Since it is often sold as a universal part, if it does not fit directly into the clutch cable receiver, you will need to fabricate or modify a mounting bracket.

Piston diameter combination
If the piston diameter of the master cylinder in your hand and the piston diameter of the clutch pump on the engine side are not compatible, problems such as "the lever became lighter but the clutch doesn't disengage completely" may occur, so it is necessary to choose an appropriate combination.