SYM 125cc Inlet/Exhaust Valve Assy

Performance Valve Set

Affordable Performance Tuning for 4-Stroke Scooters

🔧 Valve Kit · Performance Upgrade · Valve Train

Includes: Intake/Exhaust Valves, Valve Seats, Oil Seals, Collets

One of the cheapest ways to get real performance tuning. Increases engine power and smoothness without affecting everyday drivability.

This 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.

Specification	Intake Valve	Exhaust Valve
Overall Length	82.5 mm	81.5 mm
Stem Diameter	5 mm	5 mm
Head Diameter	26 mm	22 mm

• Performance Increase: Optimized valve dimensions and angles improve intake/exhaust efficiency, increasing power output.
• Complete Kit: Includes valves, springs, valve seats, oil seals, and collets - everything in one package.
• Quality Material: Made from heat-resistant alloy steel with excellent high-temperature strength and wear resistance.
• Precision Machining: Valve stems precision ground, sealing faces precision machined for optimal sealing.
• Original Compatible: Can be used directly with original engines or for performance upgrades.
• Cost-Effective: One of the most affordable performance tuning solutions available.

🔧 Installation Tip: Valve installation involves disassembly of the valve train and should be performed by professional technicians. Clean valve guides before installation and apply clean engine oil. After installing new valves, valve clearance must be adjusted according to specifications. It is recommended to grind valve seats simultaneously for optimal sealing.

⚠️ Important Note: This product is a performance valve kit, including intake valve (82.5×5×26mm), exhaust valve (81.5×5×22mm), valve springs, valve seats, valve stem seals, and valve collets. Suitable for 4-stroke scooter engines. Please verify your engine valve dimensions match before purchasing. Images are for reference only; actual product may vary slightly.