thanks for the advise guys... today i found out something more disturbing... instead of the problem i posted earlier.. there was also like a squeeking sound coming from the roller or the belting side (from the rear tyre side to be more exact). i getting worried and i plan to go to sunrise shop at kallang tmr to ask to to have a look then if they say that there is something wrg then i would go back to m bike shop and ask them either to rectify the problem or if they insisted that there is nothing wrong, i would ask them for "balck and white" in which if my bike breaks down because of the problem, they would pay for the service. Or in that black and white i would send the bike for inspection to piaggo and if piaggo say that there is a problem there, my bike shop would pay for the service since they insist that the sound is nothing serious. what do you guys think about that? or do you have any other suggestions? really need help guys....