Hello guys, I have a gilera Dna 50 all original except the weights and exhaust. I bought and installed the Stage6 per replica, along with 4g weights in the vario. The scooter runs so far quite well, pulls well and a very good speed is also there. Now I have the problem, when I drive it pulls through to 60 km/h and then falls off at speed and speed, that doesn’t always make the first few days was at 95 km/h according to tacho. I wanted now still change the HD and maybe the air filter. Can it be that the too little air gets?