Product Description: High-Performance Rear Brake Master Cylinder Assembly for Fourtrax Upgrade your Fourtrax with our Rear Brake Master Cylinder Assembly, designed for durability and enhanced braking performance. This assembly is the perfect solution for maintaining the efficiency and safety of your vehicle's braking system. Vehicle Compatibility: Specifically designed for Fourtrax 250R models from 1986 to 1989. Ensure your model is compatible before purchasing to guarantee a perfect fit and optimal performance. OE Number: Compatible with OE numbers 43500 HB9 771, 43500 HB9 006, and 43511 HA2 016. Verify these numbers match your existing parts to avoid incorrect purchases and ensure seamless integration. Sturdy Construction: Crafted from robust and stable ABS and metal materials, this rear brake master cylinder is built to withstand wear and tear, ensuring high-grade braking performance and long-lasting durability. Enhanced Braking Performance: Designed to improve braking efficiency and reliability, this component provides a safer and smoother riding experience, allowing you to enjoy your motorcycle with confidence. Ideal Replacement: This assembly serves as a direct replacement for old or broken parts, allowing for easy installation without any special modifications or alterations. Save time and effort with this straightforward upgrade. Enhance your Fourtrax's braking system with our Rear Brake Master Cylinder Assembly, delivering superior durability, improved performance, and easy installation for a safe and reliable ride.