Moto Tassinari - VForce 4X Reed Valve - Yamaha

Moto Tassinari - VForce 4X Reed Valve - YamahaMoto Tassinari VForce 4X Reed Valve Yamaha The Moto Tassinari VForce 4X Reed Valve is a serious performance upgrade for riders who want more snap, more pull, and more longevity out of their two stroke. The stock reed valve setup on these bikes does the job, but the VForce 4X was engineered to crush its limitations, giving you crisper throttle response and a noticeable increase in overall engine power without sacrificing reliability. What really sets

Moto Tassinari - VForce 4X Reed Valve - Yamaha 

The Moto Tassinari VForce 4X Reed Valve is a serious performance upgrade for riders who want more snap, more pull, and more longevity out of their two-stroke. The stock reed valve setup on these bikes does the job, but the VForce 4X was engineered to crush its limitations, giving you crisper throttle response and a noticeable increase in overall engine power without sacrificing reliability.

What really sets it apart is the durability and efficiency of the design. The VForce 4X flows air more effectively, letting your Yamaha breathe deeper while keeping reed petal wear to a minimum—so you spend less time wrenching and more time riding. That means whether you’re hammering motos at the track or threading tight singletrack on the YZ250X, you’re getting smoother delivery, quicker response, and the kind of performance edge that just isn’t possible with stock parts. It’s one of those upgrades we like because you feel the difference every time you roll the throttle.

Key Features:

• Designed to offer you exceptional durability and overcome the shortcomings of the stock reed valve system
• Increases engine power and throttle response