The Keihin PE 28mm 4T Competition carburetor is a high-performance aftermarket intake component designed for GY6 4-stroke engines, commonly found on scooters like the Honda Ruckus GY6. It regulates the air/fuel mixture injected into the engine and features:
a 28mm body offering increased airflow compared to smaller carburetors,
a PE (Progressive Enlargement) design that enhances engine response,
a higher level of fine-tuning, suitable for modified or performance-oriented setups.
The 28mm size is an effective compromise that improves torque, throttle response, and maximum power on stock or slightly modified GY6 engines (125–180cc), while maintaining good low-end torque.
This carburetor comes with a standard jet kit, but precise adjustment of the main, pilot jets and mixture is often necessary to optimize performance according to the exact configuration (exhaust, intake, altitude).
