Strange rev needle movement (1200 to zero and so on)

[aesdj]

I was stood messing with the sat nav with the bike running when I looked at the rev counter, the needle was going from 1200 to zero and back. Did'nt have time to mess with it as the lads I was with shot off down the M6. Everything was fine with the bike, running perfect, all the other clocks fine. One thing I did thinks was I'd just been through a puddle, nothing big and not at speed but I just thought water some were. Any ideas?

[robxxxx]

I start to worry when that happens on mine. Every time it has been a precursor to an R/R failure. But if you managed to get down the M6 with no issue then lets hope it was just a one off.

[aesdj]

Lets bloody hope not and that it was a one off. Must add that it only did it twice and the needle operated fine when I added some throttle.

[Timbox2]

And again not to frighten you but just maybe check your ECU plugs, and underneath the ECU, theres holes in them there mudguard that lets all sort of crap up.

[aesdj]

Now you all are starting to frighten me  . I put duck tape over the holes years ago so I don't think its that but I'll check both at the weekend.

[HockleyBoy]

Agree with Rob on this, everytime something has played up on the dash on mine it has been charging related. I would check battery and output from your regrec which is easy and at least you can rule them out.

[IlDoc]

It seems a low-voltage problem, i had the same in greece and after a few days the R/R has broken.
Chek your battery and charge voltage.

[Spud]

when my bike died on my last trip to Scotland the speedo was the first thing to play up then it died. I had to have a new RR cheers Spud