Reed Valve V-Force 4 Stage6 by Moto Tassinari Honda CR85 / Derbi

Tuning expert Stage6 has added another highlight to their already huge catalogue: Stage6 V-Force 4 Reed Valve by Moto Tassinari Honda CR85 / Derbi.

The V-Force 4 reed valve, originally designed for Honda CR 85, can be mounted on original Derbi Euro 2 / Euro 3 / Euro 4 engines, the crankcase must be slightly milled on both sides of the valve, however.

Compared to the V-Force 3 version, the V-Force 4 offers some all-new features and improvements to dramatically increase the performance of your race bike. The reed valve with double reed tip was developed for racing and optimizes air-fuel flow. Torque, acceleration and overall performance are improved across the entire rev range. The V-Force 3 is already very impressive, the newer V-Force 4 is even more efficient and is clearly built for high-end tuning.

V-Force 4 improvements / new features:

• pre-curved reed petals for improved sealing
• petals: improved carbon fibre technology
• increased flow due to wider reed cage
• petal surface enlarged by 10.5% = increased flow rate
• optimized fuel/air supply due to flow-optimized layout
• longer reed stops = less stress for petals = longer petal life
• more aerodynamic shape for better flow
• less wear and tear due to rubberised petal contact area

 Внимание: for use with Derbi engines the crankcase has to be milled a bit.