Front brake master cylinders are a core safety component on dirt bikes. For riders with 50cc to 125cc machines, a reliable hydraulic setup delivers consistent stopping power on rocky trails and steep descents. The five options below are popular aftermarket choices, compatible with common pit bikes, SSRs, Taotao, Roketa, and other brands. The buying guide that follows covers fitment, materials, and performance considerations to help you compare options without focusing on price. A quick summary table in this introduction provides at-a-glance references for the five selections.
| Product | Brand | Key Feature | Notes |
|---|---|---|---|
| CMOOD Front Disc Brake Master Cylinder | CMOOD | Complete kit: caliper, hoses, gaskets, handles | Fits many 50cc–125cc dirt bikes |
| WEIYINGSI Right Brake Master Cylinder | WEIYINGSI | 10mm banjo bolt; 7/8″ handlebars | For 50–125cc dirt bikes |
| CNCMOTOK Front Brake Master Cylinder | CNCMOTOK | Right-side lever; 8mm mirror hole | 7/8″ handlebar compatibility |
| FVRITO Front Disc Hydraulic Master Cylinder | FVRITO | 1100mm hose; 45mm spacing; 22mm lever | SSR / Apollo compatible |
| GOIMGN Front Disc Hydraulic Master Cylinder | GOIMGN | 1100mm hose; 45mm spacing; M10x1.25 | 50cc–125cc applications |
CMOOD Front Disc Brake Master Cylinder
The CMOOD unit provides a complete front brake kit designed for a broad range of 50cc to 125cc Chinese dirt bikes and pit bikes. It includes a caliper, master cylinder, hoses, gaskets, and brake handles, delivering a full replacement option without hunting for separate parts. The kit emphasizes a wide fitment across brands such as SSR, Roketa, Lifan, Coolster, Baja, Sunl, Apollo, and others, making it a practical upgrade for many Chinese-made bikes.
- Fit Model: Front brake for most 50cc–125cc Chinese dirt bikes and ATVs; SSR, Roketa, Lifan, Coolster, Baja, Sunl, Apollo, and more.
- Kit Contents: Caliper, master cylinder, hoses, gaskets, brake handles included.
- Size Specs: Brake hose length 1100mm; Caliper mounting hole spacing 45mm; Lever length 22cm.
WEIYINGSI Right Brake Master Cylinder
WEIYINGSI’s right-hand brake master cylinder is presented as a reliable upgrade for dirt pit bikes and small ATVs. It uses a 10mm banjo bolt and is designed to fit most 7/8″ handlebars. The unit claims compatibility with 50cc, 70cc, 90cc, 110cc, and 125cc kid’s off-road models, and advises customers to verify oil-screw measurements of their existing unit before purchase. The body is built to withstand heat, oil, and cold conditions, aided by nitrile rubber seals for durability under tough trail conditions.
- A Brake System Upgrade: Provides a dependable front brake master cylinder for dirt bikes and small ATVs.
- Fitment: For 7/8″ handlebars; 10mm banjo bolt.
- Fitment Scope: 50cc–125cc kid’s off-road bikes; confirm old oil-screw measurements.
- Durability: Heavy-duty pump body; nitrile rubber seals resist heat, oil, and cold.
CNCMOTOK Front Brake Master Cylinder
The CNCMOTOK unit is a right-side hydraulic master cylinder designed for dirt bikes with 7/8″ handlebars. It emphasizes a compact lever assembly with an 8mm rear-view mirror hole, which can be a convenience for riders who rely on street-legal equipment or street-legal styling on dirt bikes. The product is intended as a direct add-on replacement, simplifying maintenance and upgrading of the braking system on compatible machines.
- Fitment: 7/8″ (22mm) handlebar; right-side lever design.
- Banjo Bolt: 10×1.25mm; includes a helmet-friendly 8mm mirror hole.
- Compatibility: Suitable for Pit Dirt Bikes and ATV models that use a right-hand master cylinder.
FVRITO Front Disc Hydraulic Master Cylinder
The FVRITO kit combines a front hydraulic master cylinder with a caliper assembly and pads, aimed at 50cc–125cc Chinese dirt bikes, SSR, Taotao, Coolster, Roketa, Apollo, and related brands. It specifies notable dimensions such as a 1100mm brake hose length, a 45mm caliper mounting hole spacing, and a 22mm brake lever perch diameter. The package emphasizes a complete front brake setup, including caliper, hoses, gaskets, and pads, designed for straightforward installation and reliable braking performance under varied trail conditions.
- Fitment: For 50cc–125cc Pit/Dirt bikes from SSR, Taotao, Coolster, Roketa, Apollo, and more.
- Size Specs: Hose 1100mm; Mounting spacing 45mm; Lever perch 22mm; Banjo Bolt M10x1.25.
- Included Components: Caliper, master cylinder, hoses, gaskets, pads.
GOIMGN Front Disc Hydraulic Master Cylinder
The GOIMGN unit targets the same broad class of 50cc–125cc dirt bikes and pit bikes, including SSR and Apollo lines. It highlights a 1100mm brake hose length, 45mm mounting hole spacing, and a banjo bolt size of M10x1.25. The product is positioned as a complete hydraulic front brake solution, intended to deliver solid stopping power in a compact package suitable for a wide range of Chinese-made bikes and their aftermarket upgrades.
- Fitment: 50cc–125cc pit/dirt bikes; SSR, Apollo, TaoTao, Coolster, Roketa, and more.
- Size Specs: Hose 1100mm; Spacing 45mm; Banjo Bolt M10x1.25.
- Inclusions: Master cylinder, caliper, hoses, and pads as part of the assembly.
Buying Guide
Key Compatibility Factors
When choosing a front brake master cylinder, verify the mounting hole spacing on your caliper and the hose length needed to route cleanly to the caliper. Common spacing is around 45mm, with hoses typically around 1100mm long. Check handlebar diameter compatibility (7/8″ or 22mm is standard for many dirt bikes) and ensure the lever geometry matches your riding style. Banjo bolt size is often M10x1.25 and should match your existing line fittings.
Important Specifications
Look for kits that include the full set: master cylinder, caliper, hoses, seals, and mounting hardware. Aluminum alloy bodies provide light weight and weather resistance, while nitrile seals improve heat and oil resistance. Hose length and lever length affect routing and leverage; options around 1100mm and 22cm lever are common and versatile for many bikes.
Maintenance And Safety
- Bleed the hydraulic system after installation to remove air and ensure firm lever feel.
- Inspect seals for leaks and replace pads as needed to maintain stopping power.
- Use the correct brake fluid type and follow manufacturer guidelines for torque on bolts and banjo fittings.