Have you taken your speedo cable out and checked that it's still in one piece. It's not uncommon for them to snap. That was the problem with mine. If your cable is in one piece I have a spare cluster which you can borrow or buy (I'm in brissy) while you have your looked at. If your cable's shagged it's probably at the elbow near the gearbox, and from memory the st141 has a similar attachment, but better made (search for thread on toymods).
Chris.
