4 cycle Stage 2 > new model just released; * US patented gear box control. Designed in USA and made in China. * Engine Kit Shown installed on Bicycle; Note: Bicycle not included. * This is the second high rev 49cc 4 cycle 1.6 HP bicycle engine kit available from China. New design just released with patented gearbox engager contol; * Gear box control allows for total engine power disengagement and engagement to drive chain while engine is running and bike moving or not moving. Disengagement for people pedal mode and engagement for engine power mode. * USA EPA approved 4 cycle 49cc high rev engine; 1.5KW / 2HP output a pure pleasure to ride as compared to the high vibration 2 cycle engine found in other China kits. * Faster and more powerful than 48cc 2 cycle. With speeds from 40km to 60km depending on rear chain sprocket ratio orderd. 62 theeth to 44th. * Centrifugal clutch operation for give > gas > go. * 7000 rpm or without governor or can be orderd with a govenor to hold to a max. Of 5500 rpm. * Everything included to mount on a vee frame bicycle and operate like a moped. * Gear box with integral engager system. Handle bar controlled engager works like a clutch. Uses torque amphification to pull away without pedaling. * Gear box and chain drive to left side rear wheel; * Note: Gear box control system will also fit the Honda GXH50 50cc 4 cycle engine and can be purchased seperately as an installation kit less engine. * Includes machined universal engine mounting bracket to fit vee frame bicycles. * All parts and hardware included to mount on your own 26" bicycle. Includes rear 56 tooth 9 hole chain wheel sprocket and 415 HD chain. * Engine with rope recoil pull start. * Can pedal bike normally engine > on or off. * Speeds from 25mph to 37mph depending on sprocket ratio orded * 100 to 125 mpg gas consumption * Shipped direct from our China factory. FOB: Shanghai * Min. Order 50 units LCL / 600 per 20' container load. * Must be qualified to buy so please send your company profile and marketing plan with your first inquiry. Wholesale accounts only.