| You might try a bicycle shop for the wrench. They have all sorts of wrenches and things.
Of course, if you absolutely must have what originaly came with your bass, then you might have to get it from Yamaha somehow.
Myself, I just use whatever tool I have in my toolbox that works. Usually an adjustable wrench for the nuts on the tuning pegs. For the truss rods, I have a set of various sized hex wrenches, metric and US size, and a set of nut drivers for the odd instrument, like a Gibson, that uses that. |