How to break-in:
Any new engine requires break in. Run it the first time until good and warm then let it cool completely.
Don't ride until the second run up and only half throttle. Cool completely again. Continue the same and add longer run time as you go.
Use oil as long as it says 4T on the bottle

Engine Kit including:
1 x Lifan 125cc engine
1 x 22mm Carburetor
1 x Air Fliter
1 x Exhaust pipe
1 x Exhaust Muffler
1 x 428 Chain
1 x 428 41T Chain Sprocket
1 x Throttle Cable
1 x Throttle grips
1 x Throttle clamp
1 x Wiring Harness & full electrical components