TVS bike Engine piston and piston ring replacement with explanation

This is tvs phonix its having high engine oil cumsumption and access smoke in this in one week 800ml engine oil was shortage so we dismissed half engine and replace the piston and piston ring and assembled all thing and dine the engine timing and tappet adjustment, also we explain all thing regarding this engine this is single cylinder 4 strock engine, all bikes having over head valve and cam engine which having must timing chain for over head cam drive. Engine CC 124.5 cc. No Of Cylinder 1. Max Power 10.84 bhp @ 8000 rpm. Max Torque 10.8 Nm @ 5500 rpm. Valves Per Cylinder 2. Fuel Delivery Carburetor. Cooling System Air Cooled. Starting Mechanism Self Start.