The 2-plate slipper installs next. The B6D comes with a 78-tooth spur for modified motors and a 72-tooth spur for stock. I put a dab of black grease on the 78 spur to hold the slipper pads in place to make installation easier. The manual has you set the lock nut flush with the top shaft to initially set the slipper. Final setting can be one once you’re ready to run.