Hiya Jeff, a right can of worms your opening here eh? But IMHO this is what I would take....

QUALITY ( no cheap crap, you dont want them snapping, BUT no need for snap-on either ) tools that fit every nut on your bike ( ie can you do a full strip down and replace say steering head bearings or pull the engine cases off for a clutch change) but at the same time try to keep it MINIMAL, (I know that seems a contradiction but an adjustable spanner and a set of spanners is better than 2 sets of spanners)

ALLEN KEYS (HEX WRENCHES for our USA friends) that fit your bike

DONT FORGET THE SPARK PLUG TOOL!

PUNCTURE OUTFIT & TYRE LEVERS ( Learn how to use these, they are your friends)

12V MICROPUMP ( normal car one with casing removed, plug off and crocodile clips on instead) OR A FOOTPUMP ( yep I KNOW a foot pump is heavy, but trust me, they are reliable too and hand pumps are crap, C02 bottles exspensive and wastefull, you need too many)

A DIGITAL MULTIMETER (proper handy)

JB WELD, ARALDITE RAPIDE, DUCK TAPE, CABLE TIES, SELF AMALGAMATING RUBBER TAPE (will repair burst hoses on a KLR)

SCREWDRIVER ( i use a reversible one pinched from a BMW car toolkit)

A WIRING DIAGRAM FOR YOUR MODEL BIKE PLUS ANY EXTRAS ADDED ( colour photocopy if it is colour and laminate it, if you dont, you will wish you did)

With luck this lot wont take up too much room the spanners etc in a tool roll and the tape can have the middle taken out and squashed flat (duck tape) or wound round a film can (containing fuses etc) The Araldite, JB weld etc can fit in a small box ( a lightweight crushproof spectacle case is handy for stuff like that and tucks away easy) the only PITA (pain in the ass) is the Footpump

Hope this helps

Martyn