ZERO Motorcycles Juan 12.7mm Front Master Cylinder Assembly SDS 25-07682

• 7mm internal piston bore delivers responsive hydraulic fluid displacement, crisp lever feedback, and linear stopping power.
• Precision-machined 1
• Complete factory assembly includes integrated fluid reservoir, diaphragm, reservoir cap, mounting clamp, and front brake lever.
• Cast aluminum alloy body provides high structural rigidity under emergency braking while keeping cockpit weight to a minimum.
• Direct replacement mounts directly onto standard 7/8-inch (22mm) handlebars without requiring custom adapters or line modifications.

Restore firm lever feel, precise hydraulic modulation, and dependable stopping performance with factory replacement part number 25-07682. Engineered by J-Juan as an integrated hydraulic control unit, this complete front master cylinder serves as the primary pressure source for your front brake caliper. If your existing brake control suffers from a spongy lever feel, internal seal bypass, fluid weeping, or impact damage from a tip-over, installing a complete factory assembly ensures hydraulic tolerances and pressure curves match original design specifications.

Manufactured from high-strength cast aluminum alloy, the cylinder housing resists mechanical flex under heavy braking pressures to maintain consistent lever travel. The unit features an integrated fluid reservoir complete with an internal diaphragm and sealed cap to prevent fluid aeration and moisture contamination. The factory-machined 12.7mm bore and piston assembly provide the ideal fluid displacement ratio for matched single- and multi-piston front calipers, delivering progressive bite and smooth release across all riding environments.

[KEY FEATURES]
• Complete factory hydraulic master cylinder assembly ready for installation
• Precision 12.7mm bore diameter engineered for optimal hydraulic pressure
• Integrated fluid reservoir with seal diaphragm and secure top cap
• Rigid cast aluminum housing minimizes flex under hard braking loads
• Clamps securely to standard 7/8-inch (22mm) handlebar tubing

[FITMENT]
• Zero DS: 2015 - 2023
• Zero DSR: 2016 - 2023
• Zero FXE: 2022 - 2025
• Zero FXS: 2016 - 2023
• Zero S: 2015 - 2023
• Zero SR: 2015 - 2021

[SPECIFICATIONS]
• Part Number: 25-07682
• Manufacturer: J-Juan / OEM Zero Motorcycles
• Component Type: Front Brake Master Cylinder Assembly
• Piston Bore Diameter: 12.7mm
• Handlebar Clamping Size: 7/8 in (22mm)
• Fluid Compatibility: DOT 4 Brake Fluid
• Placement: Front Right Hand Controls
OEM Numbers: 25-07682 2507682