my Piaggio 350 is 1 year old and it just turned over 19,063 Km. , that's a very pleasant 12,000 miles, only thing I have done is dr. pulley sliders , I had to grind them down to fit, size from 25 / 17 18 gram size for Piaggio 350 is 25 / 15.9 16 gram,. and the rear tire city grip 150 / 70 14 ",, and I removed the EVAP system from the tub under the seat , as it was making the gas tank crush, all I could put in the tank was 6 Lt. gas , pumped air in to tank now I can put 10 Lt. in tank, called my dealer to fix that and now waiting for a new tank,. that will hold 14.5 Lt.