This kit includes : 50mm Cylinder Bore Kit Non-EGR style with 64mm Valve installed Piston sets–50mm Cylinder Body Cylinder head–No ERG with 64mm Valve Roller weights Oil Pump Oil Sproket Whole set of Gaskets for short case of QMB139 engine. – Kits sold separately price: $39.99 Carburetor Assembly GY6 50cc engines Inner Diameter:19mm Outer Diameter:40mm Electric Chock:2pin, male plug) – sold separately price:$18.99 Intake Manifold Engine Mouth Side Inner Diameter:18.5mm Carb Mount Side Inner Diameter:27mm Bolt Hole Spacing:45mm)- sold separately price:$3.99 Insulator intake manifold Gasket GY6 50cc Center Hole Diameter:16mm Bolt Hole Spacing:45mm -sold separately price:$2.99 38mm Performance Air Filter Intake Inner Diameter:38mm -sold separately price:$4.99 GY6 50cc Complete Variator Kit Number of Teeth:62 Number of Splines:26 Outer Diameter：87mm Roller Weight:8.5g -sold separately price:$11.99 GY6 50cc Ignition Coil Overall Length:19 inches Wire Length:14 inches -sold separately price:$5.99 A/C Gy6 Performance CDI Split Plug:2 pin/4pin Dimension:38mm*74mm*30mm AC-Alternating Current) -sold separately price:$5.99 Vacuum Actuated Fuel Valve Pet Cock 4 Ports Bolt Hole Diameter:7mm -sold separately price:$4.99 Fuel Filter Universal in-Line Fuel Filter for Scooters -sold separately price:$0.99 Rocker Arm Set GY6 50cc Length:50mm Match for 64mm Valve -sold separately price:$4.49 Muffler exhaust Kit with Pipe. Fit for most of QMB139 Engine. Length:510mm Diameter:100mm -sold separately price:$52.99 Kit comes with 1more set of roller weight for backup. Each set is with 6 pcs roller weights.