A. This rear hydraulic brake caliper master cylinder assembly is specifically designed for off-road motorcycles and is suitable for various models with displacements ranging from 125cc to 250cc. Its unique design can meet the high-intensity and high-frequency braking requirements in off-road riding, providing reliable braking performance for riders and ensuring riding safety. B. When riding off-road, the road conditions are complex and changeable, which requires the braking system to have fast response ability and strong braking force. The design of this brake caliper master cylinder assembly fully takes these factors into account. After careful adjustment and optimization, it is ensured that it can work stably in various harsh environments. It can precisely control the braking force, allowing riders to easily handle complex road conditions such as sharp turns and steep slopes and achieve smooth and safe braking. C. Whether in the wilderness of Africa, the mountains of Europe, the jungles of South America, the muddy trails of Southeast Asia, the deserts of North America, the snowfields of Northeast Asia, or the sand dunes of the Middle East, this brake caliper master cylinder assembly has won the trust of many riders with its excellent performance and stable quality, making it an ideal choice for off-road enthusiasts.