After pricing good waterproof saddlebags (panniers) that would fit my 2006 Kawasaki Vulcan 500 LTD, I just decided to do it myself and save some bucks. Have you ever tried to find good waterproof storage for your motorcycle? Did you find that they were a wee bit expensive? Well, either you've done something similar to this instructable or you've sucked it up and threw your cash at some vendor.
What to do? I found out that one of my hobbies helped with this - Geocaching.
Originally, I was going to put a few good caches around my area in ammo cases. They're waterproof and if painted right, can be hard to find. Since I was behind in putting the caches out there, I thought that ammo cases would be a great place to store small stuff on my bike.
Here is a picture of my '06 Vulcan 500.
Step 1: Get some Ammo cases
I used a standard case for 7.62mm rounds. They measured about 7in. x 3 ½ in. x 10 in.
What to check: rubber gasket inside lid, rust, and latch. Rusty, ok - just more work. Rubber gasket must be intact and pliable. Latch must work. I think I paid $7 a piece for mine from a local Army Surplus store - and they had a ton of them.
Different sizes may work, but these seem to fit my motorcycle without hampering a passenger.