Moto Tassinari VForce4X Reed Valve System - Yamaha YZ250 / YZ250X 2-Stroke (1997-2022)

Ultimate Reed Valve Performance Upgrade

Moto Tassinari VForce4X reed valve system delivers massive performance gains for your YZ250 2-stroke. Advanced design improves airflow, throttle response, and power throughout the entire RPM range.

Why VForce4X Reed Valves

✓ More power across entire RPM range
✓ Better throttle response
✓ Improved fuel/air distribution
✓ Straight-shot intake design
✓ Lighter reed petals
✓ Increased reed stability
✓ Proven race technology

Key Features

**Straight Shot Design:**
Centralized opening provides direct path to engine cases for improved fuel/air distribution

**Advanced Reed Stops:**
Increased petal stability for controlled opening and better performance

**Lighter Reed Petals:**
Shorter cage design allows lighter petals for quicker response

**Precision Engineering:**
Every component optimized for maximum power and reliability

Does It Fit?

✅ **Yamaha:**
   • YZ250 (1997-2022)
   • YZ250X (2016-2022)

✅ **Suzuki:**
   • RM250 (1996-1997)

Quick Specs

Part #: V4X07EM / 59-67621
Type: VForce4X reed valve system
Application: 2-stroke engines
Weight: 0.52 lbs

Performance Benefits

**More Power:**
Improved airflow = noticeable power gains throughout RPM range

**Better Throttle Response:**
Lighter petals react faster for instant throttle response

**Smoother Power Delivery:**
Better fuel/air distribution for consistent power

**Improved Starting:**
Better low-end response makes starting easier

Straight Shot Technology

**Centralized Opening:**
- Direct path into engine cases
- Eliminates turbulence
- More even fuel/air distribution
- Better combustion efficiency

Advanced Reed Stop Design

**Increased Stability:**
- Controls reed petal opening
- Prevents over-flexing
- Extends petal life
- More consistent performance