This is a MUST HAVE for Banshee owners! The only real way to synchronize both carbs perfectly. This will really sharpen throttle response to alleviate dead spots and improve power throughout the RPM range. It is super easy to use and comes with an adaptor to fit 26mm stock carbs all the way up to the 44mm monsters. Stop guessing and get TUNED! The adaptor is for use with smaller carbs. YOU ONLY NEED TO BUY ONE SYNC TOOL!