ok well i was out riding around today, nothing over 55mph and when i left out of cici's pizza i heard a clicking sound. It only happens in 1st and 2nd gear when i press the gas and let it go. What could this be? u-joints? i have no idea how to figure this out since it only happens when im driving in 1st and 2nd and the gas pushed down then let off. It just started today, any ideas??

 

move this up, this is my dd so i really need to know its its something to be worried about.