Didn't realize you asked for more info.
HERE is my post from another thread regarding my RAM mount (included are links to what I bought). It attaches just beside the choke switch. There's probably a little plastic cap on top of the hole you place the mount. If you remove that cap, you'll see a threaded hole (as you can see, I'm very mechanical) just asking for a bolt. IMO, it's the perfect spot for a GPS mount.
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"even a proper fitting helmet can 'get loose'" -csmith