Hi, my MP3 250 has a buzzing noise at around 40 km/hr (~26 m/hr) whenever I decelerate. i.e. If I am cruising through city traffic at about 50km/hr and decelerate when coming to a traffic light I hear this buzzing sound from about 43 km/hr until about 40 km/hr then it goes away. The sound is like you would get if a disc was lightly rubbing or a small stick was stuck against a wheel.
It has done it for about 6 months I think, but with a full face helmet I barely hear it. Yesterday I rode with an open face helmet and the sound was very clear and consistent at the speeds mentioned.
Any ideas what it could be?
Thanks,
P.S. I am a long time lurker in these ModernVespa forums. Thanks to the regular contributors all for your generous and helpful input for so many MP3 & Gilera subjects!