Direct Replacement
Fits GY6 50cc / 100cc 20mm big bore engines, also compatible with 139QMB and 139QMA scooter and moped carburetors.
Exact Dimension Data
Intake inner diameter: 20mm; intake outer diameter: 28mm
Air filter port inner diameter: 35mm; outer diameter: 39mm.
Pre-Tuned Air-Fuel Ratio
Factory calibrated for perfect fuel and air mixing. Delivers stronger power and smoother riding performance.
Stable Performance
Eliminates lean or rich fuel conditions, keeps the scooter running steadily at idle and during acceleration.