Just wait till you hear them/feel the power with a NARK!
I did get the NARK fitted. Only one minor issue regarding the screws supplied to hold on the fuse box not having washers, so the fusebox was loose, but a quick trip to the hardware store will fix that. I zip tied the thing in place for the moment. The only other issue on the Scrambler was the lack of a bottom mounting clip for the right sidecover, but if you pull the "rubber" off the rear clip there's a handy hole with which to zip tie it to another very handy hole on the frame. Zip tie job is hidden from view by the exhaust, so a.o.k.
This thing pulls like a freight train and has really woken up between 60-100mph. Freeway cruising is now easy and comfortable!
I also installed the new headlight last night - looks great. Need to get longer headlight mounting screws, and need to work on ignition switch relocation (didn't cross my mind that the switch was connected to the old headlight "wing". Currently it's zipped tied to my right fork leg right below the headlight!
Pictures soon and speedometer install this weekend.