Clapbox BOYESEN Rad Valve - Yamaha YFS200 Blaster

The Boyesen engineers have developed a series of technical innovations on its range of intake systems to optimize power, torque and flexibility: Aerodynamic Surface Optimization (internal area optimization), Model-Specific Reed Petal Tensioning (especial to each model), Material Fuel Resistance (hydrocarbon-resistant equipment, and Multi-Stage Reed Timing (clap). Clap boxes BOYESEN are developed specifically for each motorcycle model Box body 100% aluminium, optimized internal surface 4-way diffuser to optimize flow and avoid load loss Intake plate and mounting clamps provided, direct assembly without modification Variable flexibility valves, specific to each model (In carbon Aerospacial quality) Rubber-resistant and hydrocarbon-resistant valves guarantee an extended life of the joints The RC2 clap boxes, developed in competition, significantly optimize the intake streams, which leads to more efficiency, more power and better rides on your bike!