Performance A9 Camshaft for GY6 and QMB139 150cc Engines - MADE IN TAIWAN Performance A9 Cam Shaft for GY6 and QMB139 150cc Engines Increase take off power and acceleration A9 CAM SHAFT FOR GY6 150cc - Intake: 26.94 | Exhaust: 26.77 34 Teeth | Bearing: 16002c3 MADE IN TAIWAN