hey I have an old negrini moped that I am fixing up. It's missing the airbox. I measured the diameter of the airfilter pipe thing and it is 55mm about... The engine is a Morini Franco MO1 engine. Let me know if you know where I could buy an airbox this size or if you have one you could sell me. I don't know if this is a part that has a huge impact on performance or not (I know it does a bit at least), but if there are performance air boxes/filters available i'd like to know about that too.