Please provide opinion/advice. VTX 1300R. I installed Cobra slip on mufflers Deluxe Slash Cut) this past weekend.(605 miles on bike) I have the 1st service scheduled for end of the week. I have a K&N filter to install and a Dyno-Jet kit here as well. The dealer says the new jets will increase performance slightly but more importantly, will allow the engine to run smoother overall. So far with the new mufflers I have no issues. I will put the K&N on tonight and try it out. I have so far, no backfires. So, what are your thoughts ? Should I re-jet or just cruise for a while before going that route ? I have no immediate plans for engine mods.