What I keep on hand;
Gen II Commonly Used Parts List - compliments of
HaulinAshe
90111-05003-00 Cowling-2 chrome allen head screw
90111-05007-00 Cowling-1 chrome allen head screw long
90111-05021-00 Cowling-1 black allen head screw long
90154-05007-00 Cowling-1 Philips head machine screw black, (glove box lid)
90154-05013-00 Cowling-1 self-tapping philips screw, black (inside wheel well)
90202-05180-00 nylon washers (under cowling screws)
90269-06001-00 plastic pushpin rivet
90269-06081-00 plastic rivet, philips-pin)
90202-06008-00 rubber washer between insulation blanket and rivet (under fuel tank)
90150-05024-00 windshield screw
90179-05523-00 W-frame mounting rubberized bellnut
214-11198-01-00 - CRUSH WASHER (get lots)
895-14169-00-00 rubber cap (TBS)
8a7-14139-00-00 spring clip (TBS)
IMAGES
For most, I bought 10ea (screws). I only bought four rubber caps and spring clips, but I might order another "set" of four soon. I only purchased 7 new windshield screws.
With that order from Gary @ MonDak, I ordered an airfilter, but I don't keep a spare one. The oil filter/oil I can easily find. I also keep the part numbers for the oil filters in my phone in case I can't find my preferred filter while on the road. I don't carry all of that on a road trip. I might take a few crush washers along.
For tools... look
HERE (mixed in with other misc pics). I like the multi-use tools. Duct tape, visegrips, etc.
Plus, my AAA+RV card, a mobile phone and a SPOT tracker.
Adding the oil drain plug sounds reasonable. I might find that p/n and add to my list.