1. Product Overview
This manual provides essential information for the proper installation, operation, and maintenance of your WOOSTAR Rear Foot Brake Master Cylinder, Model YL-C029-126. This component is designed for various ATV, scooter, moped, dirt pit bike, and go-kart applications, ensuring reliable braking performance.
Image 1.1: WOOSTAR Rear Foot Brake Master Cylinder with key dimensions. Note the mounting hole distance of 40mm (1.6 inches).
2. Product Features
- Durable Construction: Manufactured from thickened aluminum alloy for high strength and extended usable life.
- Secure Fluid Connection: Designed with strong airtightness to ensure pipeline connections are secure and durable, preventing leaks.
- High-Density Rubber Components: Features high-density PVC outer skin for strong cold resistance, making it less prone to breaking in winter conditions.
- Excellent Braking Performance: Professionally manufactured to deliver reliable and effective braking.
- Easy Installation: Designed for straightforward modification and refitting.
Image 2.1: Close-up view highlighting the thickened aluminum alloy construction of the master cylinder body.
Image 2.2: Illustration of the secure and airtight pipeline connection point on the master cylinder.
Image 2.3: Diagram showing the high-density rubber material used in the brake fluid hose, designed for durability and cold resistance.
3. Specifications
| Specification | Value |
|---|---|
| Brand | WOOSTAR |
| Model Number | YL-C029-126 |
| Mounting Hole Distance | 40mm / 1.6 inches |
| Piston Diameter (inside pump) | 14mm / 0.55 inches |
| Thread Specifications (Threaded Push) | M10x1.25 |
| Material | Alloy Steel |
| Auto Part Position | Rear |
| Item Weight | 0.27 kg |
4. Compatibility
This rear foot brake master cylinder is compatible with a wide range of vehicles. Please verify the mounting hole distance and other specifications against your vehicle's requirements before ordering.
- 110cc, 125cc, 150cc, 200cc, 250cc Taotao ATVs, 4 Wheelers, Quads, Dune Buggies, and Scooters.
- Hawk 250cc.
- 1980 CB900F.
- CB900F, CBR1000F, CBR600 F4i.
- Suzuki GSX R600, 750, 1000.
Image 4.1: Examples of vehicle types compatible with this brake master cylinder.
5. Setup and Installation
Safety First: Always wear appropriate safety gear, including eye protection and gloves. Ensure the vehicle is stable and secure before beginning any work. If you are unsure about any step, consult a qualified mechanic.
- Gather Tools: Collect necessary tools including wrenches, brake fluid, a bleed kit, and a drain pan.
- Remove Old Master Cylinder (if replacing):
- Place a drain pan under the master cylinder to catch any brake fluid.
- Disconnect the brake lines from the old master cylinder.
- Unbolt the old master cylinder from its mounting point.
- Mount New Master Cylinder:
- Position the new WOOSTAR master cylinder at the mounting location.
- Secure it using the appropriate bolts, ensuring the 40mm mounting hole distance aligns correctly.
- Connect Brake Lines:
- Carefully connect the brake lines to the new master cylinder. Ensure all connections are tight to prevent leaks.
- Fill Reservoir:
- Fill the fluid reservoir with new, recommended brake fluid up to the MAX line.
- Bleed Brake System:
- Bleed the brake system to remove any air from the lines. Follow your vehicle's specific bleeding procedure. This typically involves pumping the brake pedal and opening/closing the bleed valve at the caliper.
- Continue bleeding until no air bubbles are visible in the fluid exiting the bleed valve.
- Test Brakes:
- Once installation and bleeding are complete, test the brake system in a safe, open area at low speed.
- Ensure the brake pedal feels firm and responsive, and that the vehicle stops effectively.
6. Operating Instructions
The rear foot brake master cylinder is an integral part of your vehicle's braking system. Proper operation ensures safety and control.
- Brake Pedal Application: Apply steady, progressive pressure to the foot brake pedal to engage the rear brake. Avoid sudden or excessive force unless in an emergency.
- Smooth Braking: For optimal control and to prevent skidding, apply the brake smoothly and gradually.
- Familiarization: Practice braking in a safe environment to become familiar with the feel and response of your vehicle's rear brake.
7. Maintenance
Regular maintenance of your brake master cylinder is crucial for safety and longevity.
- Check Brake Fluid Level: Periodically check the brake fluid level in the reservoir. It should be between the MIN and MAX marks. Top up with the recommended brake fluid if necessary.
- Inspect for Leaks: Regularly inspect the master cylinder, brake lines, and connections for any signs of brake fluid leaks. Address any leaks immediately.
- Inspect Brake Lines and Hoses: Check brake lines and hoses for cracks, wear, or damage. Replace any compromised components.
- Fluid Replacement: Consult your vehicle's service manual for recommended brake fluid replacement intervals. Brake fluid can absorb moisture over time, reducing its effectiveness.
8. Troubleshooting
If you experience issues with your brake system, refer to the following common problems and potential solutions.
Image 8.1: Visual examples of common issues requiring attention: a cracked brake pump and a cracked rubber interface at the connection.
| Problem | Possible Cause | Solution |
|---|---|---|
| Spongy Brake Pedal | Air in the brake lines, low brake fluid, worn brake pads, or a faulty master cylinder. | Bleed the brake system to remove air. Check and top up brake fluid. Inspect and replace worn brake pads. If issues persist, inspect master cylinder for internal failure. |
| Brake Fluid Leaks | Loose connections, cracked brake lines/hoses, damaged seals in the master cylinder, or a cracked brake pump. | Tighten all brake line connections. Inspect lines and hoses for damage and replace as needed. If the master cylinder itself is leaking (e.g., a cracked pump or rubber interface), it may require replacement. |
| Poor Braking Performance | Contaminated brake fluid, worn brake pads/rotors, air in the system, or a failing master cylinder. | Replace brake fluid. Inspect and replace worn brake components. Bleed the brake system. If other components are in good condition, consider inspecting or replacing the master cylinder. |
9. Warranty and Support
WOOSTAR is committed to customer satisfaction. If you encounter any issues or are not satisfied with your order, please contact our customer service team.
- Customer Service: WOOSTAR customer service is always available to help. Please message us for replacement or refund if you are not satisfied with the order.
- Contact Information: For support, please refer to the contact details provided with your purchase or visit the official WOOSTAR store on Amazon.