KYMCO Downtown 350i Repair Manual page 497

10..Brake System Downtown 350i
Inspection
Clean the master cylinder components with fresh brake fluid. Inspect the master
cylinder components for wear and damage. Replace the parts as needed
Inspect the piston and cups for wear and damage. Measure the outside diameter
of the piston.
Item Standard mm (in)
Brake master cylinder piston O.D. 12.65 - 12.68 (0.506 - 0.5072)
Inspect the master cylinder bore for wear and damage. Measure the inside
diameter of the brake master cylinder.
Item Standard mm (in)
Brake master cylinder I.D. 12.7 - 12.74 (0.508 - 0.5096)
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