I have actually never heard of someone having to change a belt =) You do need to check it tho, and if that bike is brand new, expect to need to adjust it in 600 miles or so for the first time. My bike and toby's bike both needed the belts adjusted after the first few hundred miles because it's brand new, and stretches a little with normal use and break in. Once past that point, we check it, or have it checked every time we change the oil =) (tho toby gives it a glance as it were every time we ride)