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as well as GY6 bikes with the engine codes noted below
plate and rivets for engine gear
Tuning Guide
Genuine Hooligan 170 — front
Rear Final Drive Gear Teeth: 37
Cylinder Head; 139QMB lx150 as well as GY6 bikesThis cylinder head replaces the stock equipment on bikes running 139QMB engines. Don't forget a new gasket (part number 1100 1331) and the valve assembly (part number 1100 1328)! Original Parts For Scooters SKU 151 213 Specifications: Bore: 39mm Exhaust Bolt Hole Spacing: 49. 75mm Intake Bolt Hole Spacing: 44. 75mm Compatibility: 139QMB based 50cc 80cc engines with the following engine codes: 139QMA 139QMB 1P39QMB 1P39QMA 2 YN139QMB JJ1P39QMB 139FMA 2
