Moto Tassinari VForce4 Reed Valve Yamaha 2005-2020 YZ125 YZ125X

  • $149.45
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The Moto Tassinari VForce4 reed valve system has gotten even better on your 2005 - 2020 YZ125 or YZ125X

When racers looking for the performance edge on two-stroke race bikes. The VForce4 reed valve system for the Yamaha YZ125, YZ125X will make even more horsepower and torque than before.

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 pre-curved reed petals designed to ensure superior reliability and maximum performance.

 Yamaha YZ125, YZ125X:

  • 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

    Click to see all the other performance parts for your Yamaha YZ125

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