Description:New Powerful 52cc Racing Engine With 44mm Big Bore Performance Cylinder Block Kit, CNC Engine Head Cap, Racing Carburetor and Hi-flow Air Filter, Throttle cable and Grips.Oil Gas Mixture: 1:25Max Power:2.6hp/7000rpmMax Torque: 2.8 n.m./5500rpmColor: RedFor Fast Intake and Exhaust We Use High 2-groove HP Performance Cylinder Block and Twin-window Piston, Excellent Light-weight Brings Fast Power Transfer. Similar engines from other sellers are still use old style single window pistons.The handle grips comes with a new version safe throttle clamp which with 3 adjustable and lockable throttle positions to prevent the bike from over speeding or losing control.NEW UPDATE: ALL ENGINE COMES WITH EASY-START-STYLE RECOIL PULLER.Specifications:Engine Model: 44-6Cylinder Numbers: Single cylinderStroke: 2-strokeGas-oil Mix Rate: 25:1 Bore: 43.5mmDisplacement: 52ccStart Way: recoil pull startRecoil Starter Material: New Style Easy-start Aluminium Recoil StarterCooling: Air forced coolingSprocket Size: 7 teeth fit 25H chainAir Filter: Performance high flow racing air filterSpark Plug Size: A7TCMounting Measurements: See PictureINCLUDES: 1 X Engine with Carb and Air filter