Vforce 4R Valve boxHONDA 125 CR 125 R (JE01) - 1987 - 2000Ref : VF00005A / 1009777

V-Force 4R Reed Valve for Honda CR125R (manufacturer part number V4R01D)

Designed by V-FORCE for 2-stroke motocross engines, the V-Force 4R modernizes the intake for a livelier engine performance. Its pre-curved carbon fiber reeds ensure better sealing and a more consistent response from the intake valve. The entire assembly is designed to improve airflow and gas management without altering the original cylinder architecture.

Highlights:

• Pre-curved carbon fiber reeds for optimized sealing.
• Wider box and increased reed tip area by 10.5% to enhance airflow.
• Aerodynamic profile at the tip to increase airspeed at the external intake ports.
• Extended reed stop for a gradual reduction of stress at full stroke and increased service life.
• Front area of the central reed reduced by 15.6% for a sharper profile and better internal flow.
• Overmolded rubber on the tips of the reeds to limit wear against the seat.
• Specifically designed manifold, box, and deflector for the V-Force 4R system.

Ideal for motocross riders looking to refine the intake and responsiveness of their CR125R JE01 (1998–2000). Replaces the original box and integrates into intake modifications without unverified promises: it optimizes airflow and reed durability for smoother 2-stroke operation.