ThunderMax® Adjustable Idle on a 2011 Road King®

View the newest ThunderMax video® on You Tube! The new "Low Idle" video demonstrates the adjustable idle feature available in the ThunderMax tuning software. A lower idle will help your EFI H-D® Big Twin idle cooler and improve the sound of your exhaust. The adjustable idle feature is available for both cable-throttle and throttle by wire applications.