Speedo has stopped working

[andy f]

Hey all, after a bit of help   
 
My speedo has stopped working and after reading a bit in the haynes manual not quite sure if it's the speedo or some other electrical part.
 
The Trip ( that you can reset ) has for months, only worked when riding, as soon as you turn the engine off it resets to zero. not a big problem.
Then last week the speedo and mileage stopped working.  I had planned to look at it at the weekend but a couple of days later I was coming home from work and missed a gear when accelerating hard, whacked the throttle open and the rev counter jumped up to 11 or 12 K then after that all the way home the rev counter was jumping from 0 to 3k to 7k ( which I beleive is something doing a self test ).
 
 
So the question is....do you think the speedo is at fault or something else. I personally am thinking something else because of the way the rev counter jumped.....But I don't know what.
 
I have to admit, last year there were a few occasions when the Speedo would just jump around all over the shop for a few minutes and then settle down again.
 
Have done a search on here but couldn't find the answer. Sensor...speedo....bit in the front wheel ...?
 
Thanks
Andy

[crishner]

I had this happen with mine in the end I had to replace the sepdo sensor £130  not cheap

[andy f]

Hey, thanks for the reply. When you say sensor do you mean the bit that goes in the front wheel or the bit that that then connects to ( Under the tank ?) ?
 
 
 

[crishner]

the sensor on the wheel

[andy f]

hmmm interesting, the thing that made me thought that was ok and it may be something else was the fact that the trip stopped working ages ago and the fact that the speedo popped all over the place a few times last year and the rev counter thing the other day 
 

[crishner]

where do you live if there is some one near you with a 600 you could try swapping out the spedo with there bike it aint a huge job and would give you some ideas to start

[Motorbreath]

hmmm interesting, the thing that made me thought that was ok and it may be something else was the fact that the trip stopped working ages ago and the fact that the speedo popped all over the place a few times last year and the rev counter thing the other day 

The rev counter shows the code only when the red line is reached.

[andy f]

Ahh interesting on the rev counter red line info...oops 
 
I guess I will have to take a chance and replace the sensor ( from the wheel ) and see what happens.
 
Out if curiosity, I have removed the sensor from the wheel in the past and i know it has the 2 lugs that spin in the wheel... so what does the bit that the lugs are on spin or turn at the back of the sensor? Could it just be crap in there stopping it working?
 
Thanks for the replys so far 
 
 
Andy

[Lumpy]

sounds like the power to the unit is failing, hence the resetting odometer all the time.

[andy f]

And it gets the power from......?  A unit under the tank?
 
Andy
 

[markd]

Any one no where to get a ceramic drive log for fzs 600. 
thanks guys o gals