Vforce 4R Valve boxRef : VF00008A / 1009782

V-FORCE V-Force 4R Reed Valve - Honda CR85R by V-FORCE (manufacturer part number V4R81A): a reed valve designed for motocross riders and 2-stroke engine tuners seeking more efficient intake and sharper throttle response. Designed to replace the original part on Honda CR85R, it incorporates the technical advancements that have made V-Force renowned.

• Pre-curved carbon fibre reeds for improved sealing and optimised lifespan.
• Wider box and extended reed tip (+10.5%) to enhance airflow and engine responsiveness.
• Aerodynamic profile at the inlet and reduction of the frontal area of the central reed (-15.6%) to accelerate the flow towards the external intake ports.
• Extended reed stop and overmoulded rubber at the tips of the reeds to limit progressive wear.
• Collector, box, and air deflector specifically adapted to the V-Force 4R system.

Compatible with Honda CR 85 R (std and big wheels) and CR 80 R models listed. Installation on a 2-stroke engine generally requires a check of the carburation after fitting. Manufacturer reference: V4R81A. Ideal for motocross riders looking to refine throttle response and mid-range punch while enhancing the overall intake robustness.