Boyesen Motorcycle valve box Rad Yamaha YZ250 XX 250

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

• Body made of 100% aluminium, optimised internal surface condition
• 4-way diffuser to optimise flow and avoid pressure losses
• Intake pipe and mounting clamps included, direct fitting with no modifications
• Reeds with variable flexibility, specific to each model (Aerospace quality carbon)
• Reeds coated with rubber and resistant to hydrocarbons ensuring a prolonged lifespan of gaskets

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

Features:

• weight (g): 466
• width (mm): 114
• height (mm): 111
• length (mm): 146
• volume (cm³): 1847