


⚡ Unleash your Yamaha’s true power with the VForce4R – where speed meets endurance!
The Moto Tassinari V-Force 4R Reed Valve System (V4R04) is a precision-engineered upgrade for Yamaha YZ125 (2005-2021), featuring a 10.5% larger reed tip area, advanced carbon fiber and rubber overmolded petals for extended durability, and a screw-free design for rapid maintenance. Its aerodynamic cage design boosts airflow and horsepower, delivering stronger bottom-end torque, mid-range power, and sustained top-end performance.
| Material | Plastic |
| Brand | Moto Tassinari |
| Item dimensions L x W x H | 6.8 x 5.2 x 2.7 inches |
| Exterior Finish | Painted |
| Inlet Connection Size | 1 Inches |
| Inlet Connection Type | Compression |
| Outlet Connection Type | Compression |
| Number of Ports | 2 |
| Outlet Connection Size | 1 Inches |
| Manufacturer | Moto Tassinari |
| UPC | 779423572745 |
| Model | Moto Tassinari V4R04 |
| Item Weight | 0.01 ounces |
| Product Dimensions | 6.8 x 5.2 x 2.7 inches |
| Item model number | V4R04 |
| Is Discontinued By Manufacturer | No |
| Manufacturer Part Number | V4R04 |
| OEM Part Number | 317092 |
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