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

4R Reed Valve by Vforce

The V-Force 4R reed valve modernises the intake for 2-stroke motocross and off-road engines. Its pre-curved carbon fibre reeds enhance sealing and provide a more consistent intake response. Designed for the Honda CR125R JE01, it replaces the original valve without altering the cylinder architecture.

Design and Materials

• The pre-curved carbon fibre reeds improve sealing for a more consistent intake response.
• The overmoulded rubber at the tip of the reeds limits wear against the seat.
• The elongated reed stop gradually reduces stress at the end of the stroke to preserve service life.

Usage and Performance

• The enlarged valve box and the combined reed length increased by 10.5% promote air flow at the intake.
• The aerodynamic profile at the tip of the reeds increases air speed at the external intake ports.
• The frontal area of the central reed reduced by 15.6% improves internal air circulation.

Installation and Fitting

• The valve box replaces the original equipment of the Honda CR125R JE01 to integrate intake preparation without modifying the cylinder architecture.
• The manifold, valve box, and deflector are specifically designed for the V-Force 4R system to ensure coherent integration of the whole.
• This reed valve is intended for the Honda CR125R JE01 produced from 1998 to 2000.
• Manufacturer reference V4R01D

Examples of Compatible Motorcycles

• HONDA CR125R JE01 (1998 - 2000)

Complete list of compatible motorcycles available in the dedicated section below