Bark busters save levers,perches and throttle tubes. Alot of people take notice of cable routes, and brake lines, and protect them where they touch stuff, especially radiator or head. I'd rather lose bolts than loc tite into tank or into clip nuts or fixed nuts. Don't want to damage any special fastners. Important to retorque all engine bolts, and motor mounts after warming up bike a couple times right after a disassembly. Also k5's are a little famous for having cranks out of balance, for a few reasons, and that tends to fling the bolts easier than some other bikes. As far as being prepared, I always take extra parts, nuts,bolts,washers, grips, plugs, bars, sprockets, zip ties... everything. Cause it blows to load up before you're spent. I really just watch for loose bolts and especially missing bolts for plastic, because overtightening just tears up the plastic too much, even with those captive washers.
Exhaust mount is pretty common, but that chain adjuster might have been loose axel or something, huh?