my 02 vn 750 has a buzzing noise that happens at about 4000 rpm. i found that if i reach down and grab the bottom of the fuel tank and pull up slightly the noise stops. i dont think it is anything serious just annoying anyone have any ideas?
Check all the dampers for the fuel tank (one on each side, and then there should be a rubber damper for the bolt that goes in at the back (near the seat) of the tank). The only other thing I can think is that there's something loose up around your airbox, and by lifting the tank slightly, you're putting pressure forward and tamping down whatever's vibrating up there. Maybe check that your air filter boxes/housing(s) are fully attached to the air box. ??