When selecting a rear brake master cylinder for a motorcycle, you want reliable performance, durable materials, and easy installation. This guide highlights five well-suited options for common Chinese-made ATVs, dirt bikes, and pit bikes, focusing on riders who need solid braking performance without custom fabrication. The selections cover a range of bikes from 50cc to 250cc and emphasize compatibility, ease of use, and long-term durability. The following quick-reference table helps you compare the core details at a glance.
| Product | Best For | Key Benefit |
|---|---|---|
| HIAORS Rear Brake Master Cylinder Reservoir Replacement | Budget-minded riders with Yerf Dog, Coleman, or similar ATVs | Aluminium alloy body, strong seal, easy install |
| MAD HORNETS For Ninja Rear Brake Master Cylinder Pump | Ninja-styled sport bikes and upgrade-conscious riders | Brand-new kit, straightforward install |
| PRO BAT Banjo Rear Hydraulic Master Cylinder Pump | Mounted braking on 50–125cc dirt bikes | 10mm banjo bolt, broad 50–125cc compatibility |
| Relibupdater Rear Hydraulic Caliper Master Cylinder Assembly | Pit bikes needing precise fit and adjustable spacing | Adjustable bolt spacing for fine alignment |
| LOCOPOW Rear Master Cylinder | Most Chinese 50–125cc ATVs and dirt bikes | Widely compatible with common mounting patterns |
HIAORS Rear Brake Master Cylinder Reservoir Replacement
The HIAORS unit is designed for a wide range of 50cc to 150cc Chinese ATVs and go-karts, including Yerf Dog GX150 and Coleman KT-series. Its aluminium alloy body promises durability and strong sealing to resist water ingress and rust. The design emphasizes a reliable piston function and strong pipe connections thanks to high airtightness. This makes it a practical choice for riders who want a direct replacement that preserves braking feel without modifying the hydraulic system.
Best for: Riders seeking a budget-friendly, broadly compatible rear master cylinder with straightforward installation. Choose this if you own a Yerf Dog or Coleman ATV and want a drop-in replacement that minimizes leaks and maintaining pressure.
Caution: Some installations may require precise alignment with existing lines; ensure mounting holes and lever reach match your bike.
MAD HORNETS For Ninja Rear Brake Master Cylinder Pump
This kit targets riders upgrading Kawasaki Ninja models or similar bikes with a rear brake master cylinder pump. It is described as brand-new, durable, and easy to install, with a mix of metal and plastic construction in a black finish. The emphasis is on a solid replacement option that preserves braking consistency for sportier builds.
Best for: Riders looking for a straightforward upgrade on Ninja-series or compatible sport bikes who want a new component with simple install. It’s less ideal if you need extensive compatibility beyond standard Ninja layouts.
Caution: Specific bike year compatibility isn’t listed; verify mounting and lever geometry before purchase.
PRO BAT 10mm Banjo Rear Hydraulic Master Cylinder
This model is a compact, 10mm banjo bolt hydraulic rear master cylinder designed for 50cc to 125cc dirt bikes and some ATVs. It lists compatibility with brands such as Taotao, Roketa, Coolster, and Baja—an important consideration for riders on widely sourced platforms. The measurements (center-to-center mounting distance and lever pin diameter) aid in confirming fit for an existing bike.
Best for: Riders who want a compact, easy-to-install hydraulic master cylinder with a standard 10mm banjo bolt. Choose this if your bike uses the listed mounting pattern and you’re upgrading from older hydraulics.
Caution: Verify hole spacing (center-to-center) and lever action to ensure it aligns with your brake lever and rotor setup.
Relibupdater Motorcycle Rear Hydraulic Brake Caliper Master Cylinder Assembly
The Relibupdater assembly features adjustable bolt spacing (40–50mm), enabling a precise fit for dirt bikes, pit bikes, and Taotao/SSR-type configurations. It includes a 630mm cable for flexible installation and a 15mm axle hole to accommodate common rear-wheel setups. This makes it a versatile option for riders who need a customizable and precise installation.
Best for: Riders who require adjustable mounting options for a custom pit-bike or dirt-bike setup. Choose this if you want to dial in alignment to a specific frame or wheel configuration.
Caution: The assembly relies on precise alignment; incorrect spacing can affect brake feel and reliability.
LOCOPOW Rear Master Cylinder For Chinese Engines
The LOCOPOW unit targets a broad set of Chinese-made 50cc–125cc machines, including Taotao, Roketa, Xpro, Apollo SSR, Pitster, and more. It specifies a 10mm banjo bolt compatible mounting style, making it a versatile replacement for widely used layouts. This piece is designed to fit typical mounting holes and provides a straightforward upgrade path for older hydraulic systems.
Best for: Riders seeking a widely compatible, cost-effective replacement for numerous 50–125cc bikes and quads. Choose this if your bike matches the common Chinese-market mounting patterns.
Caution: Check exact hole spacing and ensure the banjo bolt size matches your brake line.
Buying Guide: Key Purchase Considerations
- Compatibility: Verify mounting hole spacing, lever reach, and brake line fittings for your specific model and year. Many Units specify center-to-center distances (often 40–50mm) and 10mm banjo bolts; confirm these measurements against your frame and wheel setup.
- Material and Durability: aluminium alloy bodies provide corrosion resistance and durability. Look for tight seals and leak-resistant connections to maximize life span in off-road conditions.
- Installation Ease: Choose components described as easy to install with standard tools. Some kits include longer cables to accommodate different frame geometries.
- Performance Consistency: Prioritize kits with solid piston function and airtight piping connections, as these directly influence braking feel and reliability under repeated use.
- Maintenance and Spare Parts: Consider availability of replacement seals and hoses in your region. A widely compatible model increases the likelihood of accessible spare parts.
Frequently Asked Questions
- What should I check before buying a rear brake master cylinder for a 50cc–125cc bike?
Ensure mounting hole spacing matches your bike, confirm the banjo bolt size, and verify lever reach compatibility with your brake lever. - Is a 10mm banjo bolt common for these bikes?
Yes, many 50cc–125cc models use a 10mm banjo bolt; check your existing line for compatibility to avoid leaks. - Can I install a hydraulic brake master cylinder on any dirt bike?
Installation depends on hole spacing and lever geometry; some models require adapters or custom alignment. - What are signs of a failing rear master cylinder?
Spongy brake feel, leaks around the reservoir, or reduced braking power indicate possible failure or air in the line. - Are adjustable mounting options important?
Adjustable spacing helps achieve precise alignment with different frames and wheel setups, improving brake feel.