This damper piston is standard for GRK3/GRK4/GRK5.
Number of holes…3
Hole diameter…φ1.0
(R31W120) Damper piston 3 holes (4)
〇Applicable parts
General-purpose parts (for φ3mm damper shaft*)
*…Damper shafts from other companies may not be able to be installed due to different clearances, or may require shim adjustment.