Product Description
The motorcycle brake master cylinder is essential for converting hand lever pressure into hydraulic force, ensuring smooth and controlled braking. This front handbrake master cylinder (OEM: 366-25850-02-00, 366-25850) is a direct fit for Yamaha RD250, RD350, and XS650 models, featuring a 15.87mm (5/8″) bore for consistent brake fluid displacement.
Key Benefits:
✔ Durable Aluminum Construction – Ensures longevity under heavy use.
✔ Right-Hand (RH) Mounting Design – Seamless installation.
✔ Corrosion-Resistant Coating – Black e-painting for added protection.
✔ 1-Year Manufacturer Warranty – Trusted reliability.
Applications:
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Street & Touring Motorcycles – Enhances braking safety.
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Classic Bike Restoration – Authentic replacement for vintage models.
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Aftermarket Upgrades – Compatible with custom builds.
Why HBS?
As a specialized motorcycle brake parts manufacturer, we provide OEM-grade master cylinders for wholesale distributors and repair shops. Our products are tested for performance, offering competitive bulk pricing for B2B buyers in North America.
Product Information
| OE | 366-25850-02-00 | OEM No | 366-25850 |
| Part name | Brake Assembly | Application | Street Motorcycle, Off-road Motorcycle,
Touring Motorcycle, Three-Wheeled Motorcycle Honda motorcycle |
| Purpose | for replace/repair | Material | Aluminum |
| Bore | 15.87mm | Surface finish | Black e-painting |
| Car make | Y-amaha | Position | Right Front |

About HBS
Hipsen(Quzhou) Brake System Parts Co., Ltd (HBS) is a professional manufacturer of auto brake master cylinders. We produce aftermarket parts and provide custom manufacturing services.
Our products have been exported to North America, Europe…etc since 2015. We have been verified with a quality certificate of ISO9001:2015, and the ISO/TS16949 certificate is coming in 2024.
Both the finished products and the production processes have received recognition from the brands we have collaborated with For example, Cardone, Ford Otosan, Polaris, Electra Meccanica, Wildwood, Hayes, and ZongShen.
Why Choose HBS

Numerous models in stock One-year Warranty Friendly Payment Methods
Complete coverage, check in Master Cylinder Technicians follow the whole after-sales process; Safe payment methods or percentage for you
Mortorcyde Provide solutions within three working days can be negotiated
DRIVE WITH CONFIDENCE