There is another option for auto-oilers - The Cameleon Chain Oiler. I installed it on my '99VFR and it works great! Very easy to install, it took me about an hour, but half that time was spent trying to decide where to put it. The oil only comes out when the bike is running. Its great for long rides, etc., once it's installed no need to worry about lubing chain/sprockets.
You can read my installation and review here:
Cameleon Chain Oiler
I was so impressed, I'm now selling them. I'm offering $20.00 off the reg price of $199.95