Wow, thanks for the replies folks !
Exactly, the carb is located into the frame, right under the middle hatch as you can see below.
The project with this bike is to make it run clean and crisp in the stock form (I will check jetting, air box, exhaust, ignition timing and mayyyybe a little porting).
Based on the performances of it, I will see if I install a cylinder/carb/exhaust kit.
While I removed cylinder and intake manifold, I noticed a big restrictor inserted in intake port in order to detune the moped. This bike comes from Switzerland where speed limit is 18mph (30km/h). I heard that removing this restrictor will add top end power but will also remove torque and bottom power. Any advice on it ?
I will mainly use this moped for a race called RedBull Alpenbrevet in the Swiss Alps mountains. I need torque and bottom power... not so much top end power.
Thank you !