HHB Complete XS650 PMA Charging & CDI Ignition SystemComplete XS650 CDI System for XS650! Fully HHB Tested and Approved, Hugh's NEW CDI System is what these bikes have been begging for all along! 100% Crank Driven Ignition, utilizing a pre programmed advance curve in the CDI Box, and a pickup coil at the flywheel for far more accurate and consistent timing than a cam driven system. No more worries about cam chain tension stretch affecting your timing, and you can remove rotational weight from the