SYM 125cc Inlet/Exhaust Valve Set

High-Performance Valve Set (Intake & Exhaust)

Ideal Performance Upgrade for 4-Stroke Scooters

One of the cheapest ways to get real performance tuning, enhancing power while maintaining everyday drivability

This product is one of the cheapest ways to get real performance tuning. Working closely together with various 4-stroke scooter manufacturers, we have managed to increase engine performance and running smoothness. The result does not affect everyday drivability while still offering smooth running and durability. The Valve sets can, of course, be used with original (restricted) engines.

This valve set is specifically designed for 4-stroke scooters and fits a wide range of displacements and models. Key features include:

• Compatible with original (restricted) engines - direct replacement for performance gains
• Developed in cooperation with various scooter manufacturers for broad compatibility
• Improved intake and exhaust efficiency for better combustion and smoother power delivery
• Maintains everyday drivability and engine durability

• Performance Enhancement: Optimized valve design improves intake and exhaust efficiency, boosting engine power output.
• OEM Compatibility: Can be used directly in original restricted engines without additional modifications.
• Smooth & Durable: Maintains engine smoothness and long-term durability while delivering performance gains.
• Cost-Effective: One of the most affordable ways to achieve real performance tuning results.
• Quality Materials: Manufactured from high-temperature resistant, wear-resistant materials for reliability under demanding conditions.

✅ When to Replace Valves: Loss of engine power, abnormal valve noise (sharp tapping sounds), difficulty adjusting valve clearance, low compression pressure, valve burning or heavy carbon buildup. If you experience these symptoms, valves may need inspection or replacement.

⚠️ Installation Note: Valve replacement is an internal engine repair operation and should be performed by an experienced professional technician. Pay attention to valve seat lapping and proper valve clearance adjustment according to the service manual. It is recommended to replace valve stem seals and guides at the same time.