Check the inside of the cylinder body for rust, pitting or scoring.
Check the piston cup for wear or distortion.
Check the piston for rust, pitting or scoring.
Check the clutch tube line for obstructions.
Measure the clutch master cylinder inside diameter with a cylinder gauge, and the piston outside diameter with a micrometer.
If the clutch master cylinder-to-piston clearance exceeds the limit, replace the master cylinder and/or piston assembly.
Limit : 0.15 mm (0.006 in.)