Rear Brake Master Cylinder w Reservoir Switch Fits CSC SG250 ZS250-9 Z392 K2
Rear Brake Master Cylinder w Reservoir Switch Fits CSC SG250 ZS250-9 Z392 K2Rear Brake Master Cylinder w Reservoir Switch Fits CSC SG250 ZS250-9 Z392 K2Rear Brake Master Cylinder w Reservoir Switch Fits CSC SG250 ZS250-9 Z392 K2

Rear Brake Master Cylinder w Reservoir Switch Fits CSC SG250 ZS250-9 Z392 K2

$30.95

California Prop 65

Warning: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Restore full hydraulic stopping power and reliable rear brake light activation with this complete Rear Disc Brake Master Cylinder & Fluid Reservoir Assembly. Factory original equipment for 250cc street bikes and cafe racers, this complete pump kit replaces leaking internal seals, sticking pushrods, or degraded fluid cups in one simple bolt-on step.

Vehicle Fitment & Compatibility:

  • CSC Motorcycles: Direct fit replacement for the CSC SG250 San Gabriel Cafe Racer.
  • Zongshen / Chinese 250cc: Direct OEM match for Zongshen ZS250-9 platforms and various 250cc street bikes using 50mm mounting centers.

Product Specifications & Technical Specs:

  • Factory Casting Marks: Z392 K2 / Z392 KS (Front) | 240V7B (Rear)
  • Mounting Hole Distance: Approximately 50mm (2.0 in) Center-to-Center
  • Fluid Reservoir: Translucent oil cup with Upper/Lower fill lines, rubber diaphragm, and black screw-top cap
  • Brake Light Switch: Pre-wired 2-pin white quick-connector block with durable protective outer sleeving
  • Included Mounting Hardware: Mounting clevis bracket, clevis pin, flat washer (GB/T97.1), cotter pin (GB/T91), and copper banjo washers

Key Features:

  • All-in-One Replacement: Eliminates the hassle of rebuilding old master cylinders by providing the entire hydraulic assembly from the reservoir to the banjo connection.
  • Corrosion-Resistant Hardware: Metal mounting components, clevis pin, and washer are treated with trivalent chromium colored zinc plating to prevent rust and corrosion.
  • Integrated Stop Light Switch: Includes the hydraulic pressure brake switch harness to ensure your tail light instantly illuminates when applying the rear brake pedal.

Installation Tip: After mounting and attaching the linkage pin, fill the reservoir with fresh DOT 3 or DOT 4 brake fluid and thoroughly bleed the rear hydraulic brake line to clear all trapped air before riding.

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