Remove the rear wheel from the bike frame. Stack the rubber washers from the kit on either side of the wheel's spokes. The kit sprocket will be going on the side opposite the existing gear. When all the mounting hardware is in place, use your socket wrench and adjustable wrench to tighten it down symmetrically so the sprocket remains evenly spaced from the wheel hub.
Position the engine in the main triangle of the frame. Adjust the angle of the engine so that the exhaust pipe points at the ground. Fix the engine to the frame tubes using the hardware provided and tighten it down with your socket wrench. Some kits may require you to drill a hole in the frame to mount the motor. If so, mark the location and then use your drill to make a hole.
Reinstall the rear wheel onto the bike frame. Feed the new chain from your kit around the new rear-wheel sprocket and over the engine sprocket. Mount the chain guide pulley to the frame in between the front and rear sprockets, and feed the chain around the pulley. Measure the excess chain and remove it with your chain breaker. Leave enough slack in the chain to prevent it from being overly tight. Join the chain with the supplied master link.
Attach the CDI box to the frame in a free spot near the motor. Run the spark plug cable to the spark plug top and attach by pressing it firmly into place. Run the two pickup wires to the outputs on the motor and make the connections secure.
Remove the old right hand grip from your bike and install the new throttle grip from the kit. Feed the throttle cable to the carburetor and attach it with a wrench. Run the wires from the kill-switch to the engine hookups. Attach the clutch cable to the left hand grip, run its cable to the clutch on the engine and attach that cable with a wrench.
Mount the gas tank to the top tube of the frame using supplied hardware and tighten it with a wrench. Feed the fuel line to the carburetor and trim any excess with your trimmers before pressing it onto the fittings.