Yamaha Nouvo Negine Problem

[nattydread]

yes i am planning on taking it to a bike shop but i thought i would ask for some input on here before opening my wallet to the local shop

nouvo MX approx 4 years old............has 15 k on the clock but no way of telling if thats true .........engine is a little noisy but recently when it gets up to 80kmph and over there is this mettalic rasping/grating noise from the engine.........its fine below this speed and the bike has plenty of power and doesnt smoke at all.............it had no service history when i bought it a few months ago but i did get it serviced oil change... air filter ..plug

could this be a warning that the rubber belt needs changing?...............any input welcome......thanks

the title of the post should read engine problem 555555555......cant see how to correct the title

Edited August 15, 2010 by nattydread

[Xonax]

Just switch the "e" and "n" and the engine should be fine again