OEM Installation requires some mechanical skills; recommended for standard 26" V-shaped tubular frames (25 mm profile) but can be adapted to other frames. Brief installation notes: mount drive sprocket to wheel, install motor on frame and fix with supplied brackets and extension plate as needed, fit exhaust avoiding contact with frame or pedals, mount carburetor with intake tubes pointing down, attach throttle and clutch controls to handlebars, fix fuel tank to top horizontal tube and connect fuel tap, install electronic ignition with adequate cable length and away from heat sources, fit spark plug at the end of installation, adjust chain length and tensioner, and perform final checks for alignment and safe operation. Includes tips to reduce vibration and protect paint (use rubber sleeves or spacers). Bicycle Accessory