yes your right, but also you must use a piaggio "metal" flywheel.... no HP4, no vespatronic, no parmakit..... as we can't check every cylinder it's the best way we found to stop the level of tuning in this class but please keep in mind that it's a "beginner class" and not "pure racing class" for good skill drivers....and it is quiet equilibrated like this in this class in Mirecourt this year, The first had a polini 133, the second a PX200 (no kit), the 3rd a PK 125 (no kit), the 4th .....?, the 5th a PX200 (no kit).... so and there were in this class also some 136, 177 or 210cc .....