Step 1: Motivation
I already had a capable PDA that could serve as a host. Getting a GPS receiver that works with it was easy. The main questions remaining:
1. How do I securely attach the PDA to the motorcyle?
2. How do I provide power to the PDA for long trips?
Step 2: Handlebar Mount
I chose a mount that screws into the clutch lever clamp, rather than one that clamps on to the handlebar tube itself. It would also have worked on the brake lever, but I'd rather mess around with my (wire-activated) clutch than my (hydraulic) brakes.
It was a simple matter of removing the bolts holding together the two sides of the clutch mount and bolting the ball attachment in with the supplied bolts and plastic standoffs.