61MM Cylinder Engine Kit with EGR Head

61MM Cylinder Engine Kit with EGR Head for GY6 125-150CC

Upgrade your GY6 125-150cc engine with this comprehensive 61mm Big Bore cylinder engine kit. Designed to enhance performance and displacement, it includes a precisely machined cylinder, an EGR-style cylinder head, a high-quality piston kit, and all necessary gaskets for a complete installation.

• 61mm Piston Diameter for increased engine displacement and power output.
• 15mm Piston Pin Diameter ensures robust connection and durability under stress.
• 42.5mm Piston Pin Length contributes to proper piston-to-rod alignment.
• 61mm Cylinder Bore provides the foundation for the larger displacement engine.
• 24mm Intake and Exhaust Port Diameters on the cylinder head optimize airflow for better combustion and performance.

This kit is engineered to boost your engine's capacity, offering a noticeable upgrade over stock configurations. The EGR-style cylinder head incorporates a Pulsed Secondary Air Injection System (PAIR) for emission control, balancing performance with environmental considerations. With a 61mm bore and precisely sized valves (27.75mm intake, 23mm exhaust), this kit is built for enhanced combustion efficiency and power delivery.

Key Technical Advantages: Technology and Performance

Compared to standard GY6 150cc engines, this 61mm big bore kit significantly increases displacement, leading to greater torque and horsepower. The EGR head technology, combined with larger port diameters and a robust piston assembly, promotes superior airflow and more efficient fuel combustion. This translates into a more responsive ride and increased capability for demanding conditions, making it an ideal upgrade for enthusiasts seeking a performance edge.