Motorcycle Repair: 2007 Nightster Engine Knock/Cutout, senser, engine knock

Question
My wife's 2007 Nightster has had an ongoing issue and a new one. Currently approximately 4,000 miles, but since new has a cold start miss that does not occur every time.  Within first one to two minutes it acts like the ignition or injectors stop momentarily and will then keep running. It may do this once, or several times. It will not duplicate when warm and only does it on the first cold start of the day.  The dealership replaced the temp sensor but it did not fix the problem.  No code being shown.

Second new problem has been a knocking noise, sounds like it is in the back head/valvetrain area.  It does not last long, as though once oil pressure builds it goes away.  It only does this after the bike has sat for awhile, as though something is bleeding down.  Thank you!


Answer
Your knocking is probably from a lifter bleeding down. It should hold pressure, but sometimes they bleed. It won hurt anything, just a bother. If your bike is still under warrenty, I would have the dealership change it out.
I would have the dealership run a dianostic on the bike and see what is going on. Usually, the temp senser is the problem with what you describe and even though the senser is new, you could have gotten a bad one right out of the box. You could also have a short in the tem senser.
Good luck and happy riding
Mike