Urbestfriend just did the sparkplug. The black vertical Panel just at the rear of the
foot rest area is the one. Pull up the rubber mat, I think there is 2 screws in the floor.
Now inside the seat box at the hinge, look for a large (green?) headed screw. This releases
the panel at the top. There may be 2 more screws...Just look for them, the big one is
the one you wouldn't think about. I recall the plug was on the left front of the engine.
Not sure about the valves.
One thing about Kymco's....The panels are easier to remove and all have an access panel
to the top of the carb.