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Moto Tassinari

Moto Tassinari VForce4 Reed Valve - V417A - 2004-2016 KTM 250 SX, 250 XC, 300 XC

Regular price $143.05 USD
Regular price $158.95 USD Sale price $143.05 USD
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Moto Tassinari VForce4 Reed Valve - V417A - 2004-2016 KTM 250 SX, 250 XC, 300 XC

Experience unparalleled performance and reliability with the Moto Tassinari VForce4 reed valve system. Designed for modern 2-stroke motocross bikes, this innovative system increases horsepower and torque by doubling the reed tip surface over OEM designs. No matter if your engine operates at 8,000 RPM or higher, trust VForce4 to provide the durability and performance you need.

The new VForce4Ri utilizes a winged air guide that increases air velocity for a dramatic gain in throttle response. Paired with the new winged air guide is a custom intake manifold boot that offers a straighter shot to the intake that greatly enhances both airflow and performance. The VForce4Ri also incorporates carbon fiber per-curved reed petals designed to ensure superior reliability and maximum performance.


  • All-new reed petal resin system, carbon fiber and lay-up
  • Pre-curved reed petal ensures better seal at tip
  • Wider reed cage for maximum airflow
  • Combined reed tip area increased by 10.5% resulting in increased total air flow
  • Airfoil shape added to cage tip to increase air velocity from outer ports
  • Long reed stops added to progressively slow petal tip velocity, for increased petal durability
  • Reduced frontal area of central wing by 15.6% combined with a more aerodynamic shape   Rubber overmodling on reed tip surface of cage to further enhance petal life
  • Pre-curved reed petal ensures better seal at tip
  • NOTE: KTM MODELS 250SX 2003 and 250/300 EXC/MXC 2004-2006 require 2004 SX intake boot (Must Be Purchased Separately)

    Click to see all the other performance parts for your KTM, Husqvarna

    Fitment: - 2012, 2016 KTM 250 XC-W, 2007-2016 KTM 300 XC, 2007-2016 KTM 300 XC-W, 2004-2011 KTM 250 MXC, 2004-2011 KTM 300 EXC, 2004-2011 KTM 250 EXC, 2003-2016 KTM 250 SX, 2002-2011 KTM 300 MXC

    Moto-House MX - Choice of Champions Located in Clermont/Groveland Fl. The area where Motocross lives day in and out, many of the top riders in the world train. We live Motocross.