As others have already said, trim some of the redundancy out of the kit. Once you trim it down there will be room for an MRE or two which may be a better start to a long walk than a couple food bars.

Put some elements on your person. Do a "what if?"; assume you just bent the bike and it's no longer mobile. How are you getting back? Packaging part of your kit in a backpack is a good idea. I have a backpack as part of my vehicle kit. I can't carry all of it, but I can carry enough.