80cc Big Bore Kit Head GY6 Coil CDI Performance Exhaust AC

80cc Big Bore Kit Head GY6 Coil CDI Performance Exhaust AC - Parts Categories

Boost your scooter's performance significantly with this comprehensive 80cc Big Bore Kit, engineered to dramatically increase power and torque. Designed for GY6 QMB139 four-stroke engines, this upgrade transforms your ride, delivering gains of up to 30% more power and 50% more torque, making it ideal for riders seeking a competitive edge or enhanced capability.

• 47mm Bore Size offers a substantial displacement increase for improved acceleration and top speed.
• Milled Emissions-Style Head features 18mm intake and 16mm exhaust valves paired with high-performance springs for optimal airflow and combustion.
• Performance Camshaft provides a 4.75mm intake stroke and 4.55mm exhaust stroke with a 123-degree lift angle, enhancing engine breathing.
• 31,000 Volt HEI Coil & Performance AC CDI ensure a strong, reliable spark with 4 degrees of advance and no rev limiter for maximum power output.
• Complete Kit Components include cylinder, piston, rings, pin, clips, top-end gaskets, K&N Style Filter, and performance exhaust for a full system upgrade.

Compared to stock configurations or previous generations, this 80cc kit represents a leap forward in engine tuning for GY6 engines. While older kits might offer modest improvements, this package integrates a precisely engineered camshaft, a high-output ignition system, and a specially designed cylinder head for synergistic performance gains. Its broad compatibility spans popular Chinese scooter brands such as TaoTao, Buyang, Coolsport, NST, BMX, Kazuma, Sunl, ROKETA, and AIM-EX, ensuring a wide range of users can benefit from this advanced performance enhancement.

Unleash Peak Engine Capabilities

This kit goes beyond simple part replacement; it's a complete system designed for maximum power and efficiency. The synergy between the high-flow cylinder head, optimized camshaft profiles, and the potent ignition system works to extract the most from your GY6 engine. The included performance exhaust and K&N style air filter further complement these upgrades, ensuring efficient air intake and exhaust flow. Prepare for a noticeably more responsive throttle, quicker acceleration, and a higher overall performance ceiling for your scooter.