OLA Master Cylinder - Left Side (Rear Brake)

Precision Hydraulic Control for Your Rear Brake System

Restore your rear brake's hydraulic performance with our premium OLA left-side master cylinder. This critical component converts lever pressure into hydraulic force, ensuring responsive, reliable braking when you need it most.

Key Features

Precision Hydraulic Engineering High-quality master cylinder delivers consistent brake fluid pressure for smooth, modulated braking control. Experience the difference between worn and properly functioning hydraulics.

OEM-Grade Construction Built with premium materials including corrosion-resistant aluminum body and high-grade seals. Designed to withstand daily use and varying weather conditions.

Perfect Fitment Engineered specifically for OLA electric scooters with exact mounting points and brake lever integration. Direct replacement for your original left-side master cylinder.

Leak-Proof Design Advanced seal technology prevents brake fluid leaks, maintaining system pressure and ensuring consistent braking performance over thousands of kilometers.

Integrated Brake Lever Mount Complete assembly includes mounting bracket for your brake lever, simplifying installation and ensuring proper alignment.

Product Specifications

• Compatibility: OLA S1, S1 Pro,  (Left handlebar - Rear brake)
• Type: Hydraulic master cylinder assembly
• Material: Aluminum body with stainless steel components
• Piston Diameter: 12.7mm (standard spec)
• Fluid Type: DOT 3 or DOT 4 brake fluid
• Mounting: Left handlebar clamp (22mm diameter)
• Finish: Anodized aluminum with weather-resistant coating
• Includes: Master cylinder, reservoir cap, fluid sight window

Why Choose This Master Cylinder?

✓ Restored Brake Feel - Eliminate spongy or weak brake response ✓ Enhanced Safety - Critical component for reliable stopping power ✓ OEM Quality Standards - Meets or exceeds original specifications ✓ Complete Assembly - Ready to install with all necessary components ✓ Durable Construction - Long-lasting performance in all conditions

When to Replace Your Master Cylinder

Replace your left master cylinder if you notice:

• Brake fluid leaking from cylinder or reservoir
• Spongy or soft brake lever feel (after bleeding)
• Brake lever pulls all the way to grip without firm resistance
• Visible corrosion or damage to cylinder body
• Inconsistent or weak braking despite new pads/disk
• Brake fluid level drops repeatedly (indicates internal seal failure)

Installation Guide

Tools Required:

• 10mm, 12mm wrenches
• Hex key set
• Brake fluid (DOT 3 or DOT 4)
• Bleed kit or clear tubing
• Clean rags

Installation Steps:

1. Remove old master cylinder and disconnect brake line
2. Clean handlebar mounting area thoroughly
3. Position new master cylinder on left handlebar
4. Secure with mounting clamp bolts (don't overtighten)
5. Connect brake line to cylinder outlet port
6. Fill reservoir with fresh brake fluid
7. Bleed brake system completely (see bleeding procedure below)
8. Check for leaks and test brake function
9. Adjust brake lever position for comfort

Important: Proper bleeding is essential for brake function. If unsure, seek professional installation.

Brake Bleeding Procedure

1. Fill master cylinder reservoir to MAX line
2. Attach bleed tube to caliper bleed nipple
3. Pump brake lever 3-4 times, hold pressure
4. Open bleed nipple while holding lever
5. Close nipple before releasing lever
6. Repeat until no air bubbles appear in fluid
7. Top up reservoir and secure cap
8. Test brake lever for firm feel

Maintenance Tips

• Check fluid level monthly - Top up if below MIN line
• Inspect for leaks regularly - Around reservoir and fittings
• Replace brake fluid annually - Prevents moisture buildup
• Keep reservoir cap clean - Prevents contamination
• Use only DOT 3 or DOT 4 - Never mix different fluid types
• Avoid overfilling - Leave space for fluid expansion

Technical Notes

Left vs Right: The left master cylinder controls your REAR brake. This is standard configuration on OLA scooters. Do not confuse with right-side (front brake) master cylinder - they are not interchangeable.

Brake Fluid Safety:

• Brake fluid is corrosive - avoid contact with paint and skin
• Use in well-ventilated area
• Store properly and dispose of old fluid responsibly
• Keep away from children and pets

Safety Warning

⚠️ Critical Safety Component: The master cylinder is essential for brake system function. Improper installation or failure to bleed properly can result in complete brake failure. If you're not confident in your mechanical abilities, have this installed by a qualified technician. Always test brakes in a safe area before riding.

Package Includes

• 1x Left Master Cylinder Assembly
• Reservoir with cap and sight window
• Mounting hardware
• Installation instructions

Brake fluid NOT included - purchase separately

Quality Assurance

Every master cylinder is pressure-tested and inspected before shipping. We guarantee proper fitment and leak-free operation or your money back.

Technical Support Available: Questions about installation, bleeding procedure, or compatibility? Our experienced team is here to help.

Complete Your Brake System Service

Recommended Related Products:

• DOT 3/DOT 4 Brake Fluid
• Rear Brake Disk Rotor
• Brake Pads (Rear)
• Brake Line/Hose (if damaged)
• Bleed Kit

Restore Your Confidence

Don't ride with compromised brakes. A properly functioning master cylinder is essential for your safety. Order your OLA left master cylinder today and experience the difference of responsive, reliable braking.

Pro Tip: When replacing the master cylinder, it's the perfect time to inspect and replace brake pads and rotors if they show wear. A complete brake system refresh ensures optimal performance.