Boyesen Motorcycle valve box Rad Yamaha YZ125 XX 125

The engineers Boyesen have developed a series of technical innovations in their range of intake systems aimed at optimizing power, torque and responsiveness: Aerodynamic Surface Optimization (optimisation of internal surfaces), Model-Specific Reed Petal Tensioning (model-specific reeds), Material Fuel Resistance (fuel-resistant materials), and Multi-Stage Reed Timing (staged reed opening).
The reed valves BOYESEN are specifically developed for each motorcycle model.

• 100% aluminum reed valve body, optimised internal surface finish
• 4-way diffuser to optimise flow and avoid pressure losses
• Variable flexibility reeds, specific to each model (Aerospace quality carbon)
• Rubber-coated, fuel-resistant reeds ensuring a prolonged lifespan of the seals

The RC2 reed valves, developed in competition, significantly optimise intake flows, resulting in greater efficiency, more power, and better rev responsiveness on YOUR motorcycle!

Specifications:

• weight (g): 292
• width (mm): 114
• height (mm): 111
• length (mm): 145
• volume (cm³): 1835