thank you very much you are a great !!! I'm sorry, unfortunately I don't speak English, I'm doing a little bit, so if I understand correctly the tachometer of a 450, I have 350, it absolutely cannot go well with a 280, right? I asked you this because I found a tachometer of a 350 at a good price, I wanted to buy it, but if it doesn't go better, ok, thank you very much and if you need, I have others of anything in Italy, call me OK! thank you very much hug Pietro