It's the ubiquitous Chinese Universal Speedometer/Tachometer combo. I got mine from Amazon but it can be had from many places and for cheap. I did a detailed write-up in my Rpoc post, starting at #214. Kind of a PITA to do, but I like it. That said, if I was to do it again, I'd just get an 85mm od GPS speedometer, drop it in place, hook up + and -, attach the antenna, and call it done.
Mudflap just did a write up when he installed his unit here,
http://chinariders.net/showthread.php?t=19680