V-Force 4X Reed Valve Set Yamaha YZ 250

V-Force 4X reed valve system for Yamaha YZ 250 (2-stroke). This top-tier reed valve block with composite cage improves flow and engine response across the entire rev range — stronger pull, quicker throttle response and smoother running. The V-Force 4X is the reference among reed valves for motocross: long service life, precise fit and easy installation as a direct replacement for the original. The kit includes the complete reed valve block.