I'm anxiously awaiting my Cateye speedo here. I found it on Ebay for around $32 with shipping. I'm really crossing my fingers on this one because I really would like to stick with a digital, but if I can't get this one to work, I just may go to an analog speedo.
One thing I did find out from a neighbor is that the "magneto" on our bikes is what's causing the EMI. I took my speedo out of the bracket to try it while the engine was running, and sure enough, anytime it got close or came in contact with any metal parts on the bike, the speedo reset...
I guess we'll see if the Cateye can alleviate my frustration...when it comes in the mail that is.