The best way to replace the tires and tubes of your moped YouTube In this episode, Puchmeister shows Chris and Eric the correct way to change a tire on your moped. Should I overhaul my Puch engine? Puchshop tuning tips In this video, our Puchmeister Chris explains about backlash in a Puch engine block. ... Which exhaust for my Puch with 50cc, 70cc or 74cc setup? We have a very large range of various exhausts suitable for Puch, but which one should you take?...