Once you deal with the chain, use a flat blade screwdriver to loosen the carburator and slide it off of the intake.
Loosen the nut connecting the clutch cable and slide the cable out.
Disconnect the spark plug wire from the plug.
Next is the exhaust; Either remove the 2 bolts where it connects to the cylinder or the one bolt/nut where it connects to the frame.
Disconnect the 3 wires from the magneto.
Three bolts hold the engine onto the frame, 2 on the top and one on the bottom rear, usually 13 mm. Loosen all 3 and remove TWO of the bolts completely until you are ready to actually lower the motor. The motor isn't too heavy, but you certainly don't want to drop it. Remove the final bolt when you have help or feel confident you won't drop it. If the engine or frame is cruddy, it might take a little wiggling to get the motor to come down.
Clean motor, rebuild, kit, or do whatever one does with a loose V1.