MOTO TASSINARI V4X55 Vforce Reed Valves

( Brand: Moto Tassinari ), ( Manufacturer Part Number: V4X55 ), ( Part Type: Valve ), ( Disclaimer: Images Are A Representation Of The Item Only. Stock Photos. )

Review MOTO TASSINARI Vforce 4x Reed Valves #v4x55

The **Moto Tassinari V4X55 VForce 4x Reed Valves** represent a cutting-edge advancement in high-performance engine tuning, meticulously engineered to deliver unparalleled airflow efficiency and reliability for forced induction applications. Designed with precision for use in naturally aspirated or turbocharged engines, these reed valves are a game-changer for enthusiasts and professionals seeking to maximize power output while maintaining structural integrity under extreme conditions. Crafted from high-grade **aerospace-grade aluminum alloy**, the V4X55 series ensures exceptional durability and resistance to thermal stress, making them ideal for high-RPM scenarios where traditional valves often falter. The **4x reed configuration** optimizes airflow dynamics by minimizing backpressure and maximizing volumetric efficiency, allowing for smoother throttle response and reduced pumping losses critical factors for both street and track performance. Each valve is treated with a **specialized anodized coating** to enhance wear resistance and reduce friction, ensuring longevity even under aggressive driving conditions or prolonged high-load operation. The **VForce design** incorporates a unique valve geometry that minimizes turbulence and promotes laminar airflow, which translates to improved horsepower and torque across the entire RPM spectrum. Whether integrated into a high-flow intake system, supercharger setup, or turbocharged application, these reed valves are engineered to handle the demands of modern high-performance engines without compromising on performance or reliability. Backed by Moto Tassinari s reputation for innovation and engineering excellence, the V4X55 VForce 4x reed valves are a must-have component for those pushing the boundaries of engine tuning, offering a perfect blend of aerodynamics, strength, and precision.

### **Pros and Cons of buying a Moto Tassinari V4X55 VForce 4x with Reed Valves**

#### **Pros**

1. **High Performance and Power** The V4X55 is a high-revving engine designed for speed and acceleration, making it ideal for track use or high-performance street applications. The VForce 4x configuration (four valves per cylinder) improves airflow and combustion efficiency, leading to better power delivery.

2. **Durability and Build Quality** Moto Tassinari engines are known for their robust construction, using high-quality materials like forged components, billet crankshafts, and precision-machined parts. The V4X55 is built to handle extreme stress, making it suitable for aggressive driving and racing.

3. **Reed Valve Technology** The inclusion of reed valves (instead of traditional poppet valves) reduces reciprocating mass, improves valve train efficiency, and allows for higher RPM operation. Reed valves are also simpler in design, reducing wear and maintenance compared to complex camshaft-driven systems.

4. **Lightweight Design** The engine is relatively compact and lightweight for its power output, which helps improve the overall power-to-weight ratio of the vehicle it s installed in. This is beneficial for both performance and handling.

5. **Customization and Tuning Potential** The V4X55 is a popular choice among tuners and builders due to its modularity. It can be paired with various cylinder heads, intake manifolds, and fuel systems to optimize performance for different applications (street, track, or drifting).

6. **Proven Reliability in Racing** Moto Tassinari engines have a strong reputation in motorsport, particularly in drifting and track racing. Many professional drivers and teams trust these engines for their consistency and ability to handle high stress without catastrophic failure.

7. **Aftermarket Support** There is a well-established aftermarket for Moto Tassinari engines, with readily available parts, upgrades, and tuning services. This makes maintenance and modifications easier compared to some lesser-known engine brands.

---

#### **Cons**

1. **High Cost** The V4X55 is an expensive engine, especially when fully built and tuned. The base price is already substantial, and additional upgrades (such as custom cylinder heads, fuel injection, or supporting drivetrain components) can push the total cost into the tens of thousands of dollars.

2. **Complexity and Maintenance Requirements** While reed valves reduce some complexity compared to poppet valves, the engine still requires precise tuning, regular maintenance, and skilled installation. Issues like fuel delivery, ignition timing, and cooling must be carefully managed to avoid overheating or detonation.

3. **Fuel Demand** The V4X55 is a high-performance engine that consumes fuel at a rapid rate, particularly under aggressive driving conditions. This can lead to higher running costs compared to stock or less powerful engines.

4. **Wear and Tear on Supporting Components** The high power output of the V4X55 can stress the transmission, differential, suspension, and brakes of the vehicle it s installed in. Upgrades to these systems may be necessary to handle the increased power safely.

5. **Learning Curve for Installation and Tuning** Building and tuning a V4X55 requires mechanical knowledge and experience. Beginners may struggle with tasks like balancing the engine, setting up fuel injection, or troubleshooting performance issues. Professional help is often recommended.

6. **Potential for Overheating** Due to its high-revving nature and power density, the V4X55 can overheat if cooling systems (radiator, fans, oil cooler) are inadequate. Proper cooling solutions must be implemented to prevent damage.

7. **Limited Stock Availability** Moto Tassinari engines are not mass-produced for stock vehicles. If you re modifying a car that wasn t originally designed for such power, you may need to invest in additional components (e.g., reinforced chassis, upgraded exhaust) to safely accommodate the engine.

---

### **Ending Conclusion**

The Moto Tassinari V4X55 VForce 4x with reed valves is one of the most capable and high-performance engines available for custom and racing applications. Its strengths lie in its power, durability, and tuning potential, making it a favorite among enthusiasts who prioritize speed and track performance. However, the high cost, complexity, and maintenance demands make it less suitable for casual drivers or those on a tight budget. It is best suited for experienced builders, racers, or those willing to invest significant time and resources into optimizing and maintaining the engine.

### **Recommendation**

- **Buy if:** You are an experienced mechanic or have access to professional help, you re building a vehicle for racing or high-performance driving, and you re prepared for the financial and technical commitment. The V4X55 is ideal for drift cars, track cars, or heavily modified street machines where power and reliability are critical.

- **Avoid if:** You re a beginner, looking for a cost-effective solution, or planning to use the engine in a vehicle without proper supporting upgrades. In such cases, a more accessible engine (e.g., a turbocharged or naturally aspirated inline-four with simpler tuning requirements) might be a better fit.

For those who meet the criteria, the V4X55 is an excellent choice for pushing the limits of performance, but it demands respect, proper preparation, and ongoing care.

Details:

Manufacturer: Moto Tassinari. Introducing the all-new VFORCE4X reed valve for all GASGAS, Husqvarna and KTM TBI oil-injected model's. Model: Vforce 4X Reed Valves. Gives a crisper throttle response, wider peak power and extended reed petal life because the 50/65 SX model's aren't fuel or oil injected.

Some images will show accessories or parts that are NOT included with this listing. No knock offs or fakes here. Actual item may differ. Moto Tassinari Vforce 4X Reed Valves.

part #: v4x55 prices

• $142.36-$149.63

specifications intakefuelmotorcycle:

• brand: Moto Tassinari
• mpn: V4x55
• part type: Valve
• disclaimer: Images Are A Representation Of The Item Only. Stock Photos.

offer intakefuelMotorcycle:

• sold: 0
• availability: In Stock
• options: Ship-to-home
• started: June 3, 2026

returns intakefuelMotorcycle:

• time: 30 Days
• policy: Returns Accepted
• paid by: Seller

shipping intakefuelMotorcycle:

• cost: $0.00
• type: Fixed
• class: Economy, Expedited
• carrier: USPS
• transit: 3-7 Days
• service: Economy, USPS Priority Mail, USPS Priority Mail Express

seller intakefuelMotorcycle:

• city: Hudsonville, Michigan
• # reviews: 125462
• rating: 100.0%

payments intakefuelMotorcycle:

• wallet: Paypal
• other
• credit card: Diners-club

general intakefuelMotorcycle:

• condition: New
• Motorcycle Scooter Parts Accessories > Air Intake Fuel Delivery > Other Air Intake Fuel Delivery

Moto Tassinari V4X55 Is Similar To:

• 00-0000-000 Moto Tassinari Vforce Reed Valve Assy Honda Carbon Fiber (56.4% similar) 2004 Honda CR250 2-STROKE vforce 3 reed assembly intake boot free shipping used good condition vforce cage carbon fiber reeds chipped rubber air clamp may fit other years model's...(May 11th, 2018)
• 10080064 Moto Tassinari V-force 3 (53.7% similar) This item is brand new, never used in a opened box. This reed kit will fit a 2013 YZ250 but I don't know if it anything higher than Z. Was bought for my 2013 YZ250 and then sold the bike...(January 17th, 2018)
• 10080301 Moto Tassinari Husqvarna Te300 (38.6% similar) 5, resulting in increased total airflow airfoil shape added to cage tip increase air velocity from outer ports long reed stops progressively slow petal velocity, for durability reduced frontal area of central wing by 15. 6, combined with a more aerodynamic shape rubber over molding on reed tip ...(August 11th, 2017)
• Moto Valve Yamaha V307a Yz250 Assembly Vforce3 1997-2014 Tassinari Reed (31.1% similar) ...(January 29th, 2015)
• 2p090-1 Moto Tassinari Replacement Reed (50% similar) Your friends at classic cycle parts appreciate business...(October 27th, 2018)
• 2p117-1 Moto Tassinari Delta Replacement Reed (48.9% similar) Buyer pays return shipping. Reed cage included no material carbon fiber this product ships directly from the manufacturer...(March 11th, 2018)
• 3p411h Moto Tassinari Powersports Reeds (52.3% similar) Quantity sold individually. Reed cage included no material carbon fiber this product ships directly from the manufacturer. Buyer pays return shipping...(July 15th, 2017)
• 3p412m Moto Tassinari V-force Reed (62.7% similar) Products found to be defective with in a 60 day period of purchase shall returnable us at our expense. It must also be in the original packaging...(January 28th, 2018)
• 3p683a-1 Moto Tassinari Replacement Reed Petals For System (50.5% similar) Moto Tassinari replacement reed petals for v-force 3 system 3P683A-1 VF3 sold as 4 pack order one per cylinder...(April 24th, 2019)
• 3p683m Moto Tassinari Replacement Reed (50.6% similar) This excludes errors deemed to be the mistake of Murray cycles. All shipping duties and fees are calculated by, not us. These are the main fees associated with an online retail marketplace, and neither recoup able if you decide no longer want product. Please be advised there is an enormous cost of ...(December 7th, 2017)
• 3p794a Moto Tassinari Powersports Reeds (52.3% similar) Reed cage included no material carbon fiber this product ships directly from the manufacturer. Notes these are a 4-PETAL reed design. Buyer pays return shipping...(September 2nd, 2017)