Speedo not working!

Hey guys,
I was riding home from work today when the the bike just lost power and died. I figured that it had run out of fuel so switched it to reserve, started it up and rode to the petrol station.
Once I filled up I reset the trip meter to zero (I got 280km out of my first tank, not bad) and when I was pulling out of the servo I noticed the speedo isn't working!
The trip meter and the speedometer don't work! The tacho still works fine but I have no idea what happened. It was working fine until I reset the it to zero.
Any ideas?
I was riding home from work today when the the bike just lost power and died. I figured that it had run out of fuel so switched it to reserve, started it up and rode to the petrol station.
Once I filled up I reset the trip meter to zero (I got 280km out of my first tank, not bad) and when I was pulling out of the servo I noticed the speedo isn't working!
The trip meter and the speedometer don't work! The tacho still works fine but I have no idea what happened. It was working fine until I reset the it to zero.
Any ideas?