Hi all "Happy new Year" to you all, when I was competing in the BBR & the like I carried (what I called) a rally tool kit in addition to the bikes kit, this comprised of a ratchet and socket that fitted the wheel nuts, a set of socket drive Allen keys that also fitted the ratchet. The thinking behind these additions was that speed would be of prime importance during a rally, also as a lot of bodywork would need to be removed for certain jobs I purchased a battery powered electric screw driver that would accommodate the torqs bits needed for the BMW screws.
As far as spares to be carried as well as a set of light bulbs, some fuses, a selection of cable ties, a reel of duct tape & the usual puncture kit with compressor I carried a new speedo cable as in those days a minimum mileage needed to be achieved in order to get a finisher certificate, and a broken speedo cable would be a game finisher !!