Clutch Pulley Bent?

[lolo123]

when replacing clutch spring and clutch i bent the clutch pullley a little when depressing old spring off the pulley its not bent severly but when i get into high rpm on scooter it makes a winding noise and bucks once then dies. Could this be caused by the belt popping off the pulley. It has never came completley off. When it dies it will start right back up it just bucks once and then dies in high rpm. The belt is about shot could this be the problem or a slight bend in the clutch pulley. Thanks for the help.