Hi everyone. Hope someone can help, bought ISO grips from here, but I want to change the throttle tube for a throttle tamer tube instead for my Vstar 1300. Have tried everything boiling water, freezing, vice grips, etc but nothing works to remove the original tube, must of used super glue when they assemble them. Kuryakyn told me they don't have blanks, thats how they come. Has any one esle had this problem or a solution. Your help would be greatly appreciated.