I wasn't satisfied with the awkward and 'clunky' looks of manufactured satnav mounting kits, and though they are very flexible to cover a large range of bikes, I thought that I could do better! Luckily, I found a pair of unused pre-threaded bolt holes under the front edge of my top yoke, otherwise this would not have been so straightforward. So half the problem is finding a suitable method of attachment. Let's get on with my first instructable...
Step 1: Raw materials
Here are most of the bits that you need. I spent Â£3 on the metal offcuts, and having them cut to outline shape by a local metal suppliers. Sizes in this case were a sheet of 4mm aluminium plate, 100mm x 50mm, and a 50mm length of 25mm diameter alloy tubing, with a good wall thickness for putting a thread in. A couple of M5 bolts and washers completes the package. You obviously also need the satnav cradle - mine is the standard Garmin cradle for a bicycle or non-powered motorcycle application.
You will require a selection of metal-shaping tools; I used some hand-held electric tools and common hand tools for shaping work. Band saws, pillar drills and mills would improve speed and accuracy, but are not necessary.