Oil Pump Sprocket with 33 Teeth for 50cc 4-stroke QMB139 engines. QMB139 Oil Pump forr 33 Tooth Gear Vacuum Actuated Fuel Valve / Pet Cock GY6 50CC 4 Ports Bolt Hole Diameter: 7mm A/C Gy6 Performance CDI 50CC 125CC 150CC Split Plug: 2 pin/4 pin 38mm*74mm*30mm AC-Alternating Current Insulator intake manifold Gasket GY6 50CC Center Hole Diameter: 16mm Bolt Hole Spacing: 45mm Intake Manifold GY6 50CC Engine Mount Side Inner Diameter: 18.5mm Carb Mount Side Inner Diameter: 27mm Bolt Hole Spacing: 45mm GY6 50CC Complete Variator Kit Number of Teeth (drive face): 62 Number of Splines (drive face): 26 Outer Diameter (variator): 87mm Roller Weight: 8.5g Carburetor Assembly GY6 50cc engines Inner Diameter (intake): 19mm Outer Diameter (air filter mount): 40mm Electric Choke (plug style): 2-pin, male plug GY6 50CC carburetor for 4 stroke QMB139 engine. High Performance Ignition Coil GY6 50CC 125CC Overall Length: 19 inche Wire Length: 14 inches 38mm Performance Air Filter Intake Inner Diameter: 38mm QMB139 39mm Piston Kit GY6 Engine Piston Outer Diameter: 39mm Piston Overall Height: 33mm Piston Pin Diameter: 13mm Cylinder Body 39mm GY6 50cc Bore: 39mm 39mm bore cylinder with short CVT Case Gasket Set Overall Length (left CVT cover gasket): 15.75 inches Bore 39mm cylinder cam holder retainer bracket and rocker arms 50cc（64mm Valve) Only used in GY6 50cc engine with 64mm Inlet/Exhaust Valve.. cam holder retainer bracket and rocker arms for 139qmb GY6 50cc 4-stroke engines. GY6 50cc Cylinder Head Stud Bolt M6 x 1.0 x 32 mm M6 x 1.0 x 63 mm GY6 50cc 39mm Bore non-EGR cylinder head with 64mm valve non-EGR(Non-Emissions) Style Cylinder Head 39mm Bore Valve Length: 64mm Overall Height: 59.5mm Intake Port Diameter: 17mm Exhaust Port Diameter: 18mm Exhaust Bolt Hole Spacing: 49.75mm Intake Bolt Hole Spacing: 44.75mm Fuel Gas Oil Filter 3/16″ In-Line Fuel Filter used on Scooters, Motorcycles, ATVs, Dirt Bikes, Go-Karts, Dune Buggies and much more