GY6 80cc 47mm Bore non-EGR Cylinder Head with 69mm Valve

Engineered for optimal performance, this non-EGR cylinder head boasts a 47mm bore and is equipped with 69mm valves, specifically designed to enhance power and efficiency for QMB139 engines.

• 59.5mm Overall Height ensures precise fitment within engine configurations.
• 17mm Intake Port Diameter facilitates robust air-fuel mixture intake for improved combustion.
• 18mm Exhaust Port Diameter promotes efficient expulsion of exhaust gases, reducing backpressure.
• 49.75mm Exhaust Bolt Hole Spacing guarantees secure mounting of the exhaust system.
• 44.75mm Intake Bolt Hole Spacing ensures a stable connection for the intake manifold.

Compared to standard 50cc heads, this 80cc upgrade offers a significant displacement increase, delivering more power and torque without compromising reliability. Its non-EGR design simplifies the system, focusing on raw performance gains that surpass previous models and generic industry alternatives.

Key Technical Advantages: Technology and Performance

This cylinder head leverages advanced design principles to maximize airflow and combustion efficiency. The larger 47mm bore and 69mm valves work in synergy to create a more potent power band, ideal for riders seeking a noticeable performance boost over stock components.