Kymco Super 8 4T 50 – First inspection after 11 years without any idea – is that possible?

Hello together, by chance my old Kymco Super 8 4T 50 found back in my possession. I bought the scooter in 2010 as a new vehicle, drove it for a year and then delivered it. Even if the scooter was not in my possession in the last 11 years, I changed the engine and transmission oil every year and sometimes installed new plugs, spark plugs or batteries. Otherwise the scooter has not received any maintenance or no workshop since 2011 meh The brakes, the brake fluid, the air filter as well as the drive belts and what else is there are now 12 years and 27,000km old. The scooter drives as normal as far as possible and has no starting or passing difficulties. Except for sporadic swallowing, if one goes from 1/2 or 3/4 gas very quickly to full gas. However, since mileage 10,000 the oil consumption is relatively high, all 200-400km the scooter needs 0.2l 5W40 or 5W50. With 0W30s are even a But he doesn’t smoke 0,2 l of blue. In addition, something rattles as soon as the engine runs. Sounds like a bearing damage, however, noise always stays the same and does not change at the speed. The spark plug was also very white and had small black clumps on it. I wanted to do something good for this thing and do an inspection myself. Motor/gear oil I get changed, smaller repairs I also get there. I take over without further premonition or Is such a thing feasible? What would it be for such an inspection to exchange and/or test on a scooter?