I ride an '06 Streetbob with a stage 1 upgrade and recently have had a problem with my rear cylinder. I have plenty of spark, but no fuel getting to the rear cylinder. I am not sure if this is a problem with the aftermarket fuelpak or a clogged injector. Any suggestions would be greatly appreciated. I would rather not take it to the dealer as I am trying to learn how to work on my ride as much as possible. Thanks in advance.