Clear, straightforward documentation tells you how to set it up and the order in which to do the procedures. The injector from my 08 Husqvarna and ND connector fit just fine. It was cool to see the proper spray pattern after it got cleaned out. Definitely made a difference how my bike ran afterwards. If you have a chunky idle or midrange just doesn't feel right, and you've changed your fuel filter, then it just might be a dirty injector. Give it a try.