Description
The Moto Tassinari VForce4X V4X55 Reed Valve System is purpose-built for the next generation of 50cc and 65cc motocross machines. Designed specifically for KTM, Husqvarna, and GasGas mini models, the VForce4X delivers stronger mid-range power, increased top-end performance, and improved over-rev compared to the already proven VForce3 system.
Featuring a newly engineered reed cage, air guide, and reed petal combination, the V4X55 maximizes airflow efficiency while maintaining durability for competitive racing. Whether it’s for aspiring young riders or serious junior racers, this system ensures sharper throttle response and a noticeable performance boost throughout the rev range.
Compatible Models & Years
KTM
- KTM 65 SX – 2009–2026
- KTM 50 SX – 2015–2026
Husqvarna
- Most current TC 50 and TC 65 models
GasGas
- Most current MC 50 and MC 65 models
Key Features
- Increased mid-range horsepower
- Stronger top-end pull with improved over-rev
- All-new reed cage design
- Redesigned air guide for improved airflow
- Advanced reed petal construction
- Improved throttle response
- Designed specifically for modern 50cc and 65cc motocross engines
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