Throttle Thumb Tension Screw Kit For Harley Davidson 1974 & Later | Replaces 56397-74C, 56402-83A – Adjustable Control Knob

About This Product

Fine-tune your Harley's throttle feel with this simple but effective thumb tension screw kit. Fits most Harley Davidson models from 1974 onward, replacing part numbers like 56397-74C, 56402-83A, 56394-74, and 11155. Made from stainless steel and alloy, it's built to last and resist wear. The kit includes the adjuster screw, spring clip, e-clip, and spring—everything you need to swap out the old part. Adjust the tension to match your riding style: tighter for more control, looser for less hand fatigue. Installation is straightforward with common tools, and it integrates seamlessly with your original throttle system. Whether you're cruising highways or tackling twisties, this little upgrade gives you more precise throttle response and a comfier grip. A must-have for riders who want their bike to feel just right.