My moped (Vespa Piaggio Ciao Mix) runs with Gianelli sport exhaust, carburetor 13/13 + matching Luffi and smaller Übersetsung only about 31 KM / H!
Now I wonder if the one probably on the compression of the engine (50 cc) could be!
25,000 Km driven - With him were already 20,000! Can you measure the compression and if such increase again ??
Please serious answers :) Thanks MFG