While a good set of wrenches will go a long way, you still need a bunch of other tools in your garage. Screwdrivers are a must have for any motorcyclist. While you can buy some seriously expensive screwdrivers and be quite happy with the results, in my experience, you don't have to spend too much to get a satisfying pair of screwdrivers. The Stanley 10-piece set show above is probably all you'll really need
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The Stanley screwdrivers show above have hardened tips and a not slip fit that means you're less likely to strip out screws and more likely to get the screws out if they're already stripped.
The set includes 1-point Phillips, 2-point Phillips, 4 slotted and a couple stubby screwdrivers as well as two smaller scredrivers that are listed as pocket sized. I'd toss those in with the tool kit I keep on my bike. At about 8 bucks, there's not much to complain about.