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Thread: please help rev counter

  1. #1
    Baby Twin
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    please help rev counter

    went out for a ride earlier, starting the bike and the battery went a bit flat which reset my tacho and clock, but now my rev counter is reading wrong.
    I cant set the rev light past 10,000 and needle seems to be at 1000 rpm when it sounds like it should be at 3000.
    Also when bike is turned off needle is at about 3 o,clock.
    I think possibly needle has moved on shaft has anyone else had this

  2. #2
    Baby Twin Gordy's Avatar
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    hi mate. sounds like the problem i have as well,(bump) I,m sure someone will be along with an answer shortly as i would like to get it sorted.

    REgards Gordy.

  3. #3
    amb67
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    Disconnect the battery and leave for a few minutes, then reconnect.

    It should reset itself and return to its normal position.

    Let us know if it doesn't.

  4. #4
    Baby Twin
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    rev counter

    if anyone else had this problem did what amb67 said and needle went even further round the clock (backwards).
    disconnected battery again and tried again and noticed every time i touched the negative lead on battery terminal the needle went back a bit more, so kept on doing it untill needle went all the way back round the clock to its proper position, then connected the battery. happy camper.


    thankyou for your help amb67

  5. #5
    amb67
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    Quote Originally Posted by steppy78 View Post
    if anyone else had this problem did what amb67 said and needle went even further round the clock (backwards).
    disconnected battery again and tried again and noticed every time i touched the negative lead on battery terminal the needle went back a bit more, so kept on doing it untill needle went all the way back round the clock to its proper position, then connected the battery. happy camper.


    thankyou for your help amb67
    Glad it sorted it out, usually does.

    LOL I had a few dash issues this afternoon, apparently I was doing 259MPH down the A22 today, felt more like 70MPH to me but hey, who am I to argue with an Italian electronics masterpiece?

  6. #6
    Evil Twin theruck's Avatar
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    i have the same issue but the connect/disconnect thing does not move the needle so precisely and there is no "0" shown on the clock so it is quite impossible to catch the resting possision. any toher ideas how to reset the rev counter? the battery disconnection does not help it
    Last edited by theruck; August 14th, 2009 at 08:28 AM. Reason: corected typos

  7. #7
    Baby Twin
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    the needle moving is quite erratic, i guessed where the start point of the needle should be.

  8. #8
    Evil Twin theruck's Avatar
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    i wonder if there is a way how to make the needle to go to exact to point 0. if there is not a way i would say that the clock is faulty. am i right?
    does it happen on clocks of ppl who have no problems with the solenoid/battery? - e.g. when i disconnect the 10A fuse on the battery and plug it back the clock needle goes back.

  9. #9
    amb67
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    Have you turned off all your electrical consumers?

    My dash issue was caused by a headlamp bulb fault, the electrics on these bikes are strange.

    Try this and let us know how you get on.

    PS. Is it reading wrong when the engine is running/revved up/ridden?

  10. #10
    Evil Twin theruck's Avatar
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    it goes back when i connect trhe battery. then the zero is shifted counterclockwise so at 8000 rpm it shows 3000. but the 6500 light goes on as it should so "only"the needle does not show the reality. i tried with battery disconnected for a day but it did not fix that problem. light bulbs you say? i will give it a try

  11. #11
    amb67
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    Check that your main beam illumination warning on the dash works OK.

    Have you had any warning lamps on the dash flash up recently - Fuel, engine oil pressure, side stand lamp, neutral lamp?

    Check the side stand switch is operating OK or perhaps bypass it to see if it gets rid of this issue.

    Check the terminals on the multi plugs at the ECU are not green/corroded nor any pins have been pushed out.

    Check the main connector at the back of the dash clocks has not come out or not been pushed in fully, make sure the connectors are not green/corroded.

    Plenty to check

    They are all connected trust me.

  12. #12
    Evil Twin theruck's Avatar
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    ok i will check them but what then? even if i disconnect the electric fuse it does not get repaired so how do i set it back to 0? that is a question...

  13. #13
    Evil Twin theruck's Avatar
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    bump
    i have now the battery out of the bike for several months and the clocks are still showing some 4000 RPM. any idea how to get the needle to the right place?

  14. #14
    amb67
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    Quote Originally Posted by theruck View Post
    bump
    i have now the battery out of the bike for several months and the clocks are still showing some 4000 RPM. any idea how to get the needle to the right place?
    Sounds like the needle has come loose on the shaft or perhaps the tacho drive/dash unit has developed a fault.

    Follow my dash colour change guide for the strip down, only go as far as to the point you can actually get at the tacho needle.

    With no power to the dash unit, e.g. Multi plug disconnected the needle should be held firmly in a position which is just about 2cm from the start of the readings. If it flops around then it could be that the drive unit has failed or the needle has come loose on the shaft.

    Pull very gently on the black cover over the tacho needle centre boss, be careful as you can break this easily. Pull up on the needles centre hub and it should come away quite easily.

    Grab the tacho shaft, can you spin this with your fingers?

    If you can then it sounds like your tacho driver has failed.

    However, I'd just go with setting it up as per the images below and making sure the tacho needle is secure on the drive shaft first.

    HTH

    Here's a piccie of my dash at rest and then running:




  15. #15
    Evil Twin theruck's Avatar
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    the rev counter works. it just always goes back 10 clicks when i connect the battery. therefore it is set to have 0 on 4. i can connect nd disconnect the battery untill i get to 0 anyway i wonder why the rev counter "does not know where 0 is" even if the electricity is off.

  16. #16
    amb67
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    Hopefully it's just the needle slipping on the shaft, if that's secure then it has to be the drive control for the needle, which unfortunately means that it's a new dash mate.

    Quote Originally Posted by theruck View Post
    the rev counter works. it just always goes back 10 clicks when i connect the battery. therefore it is set to have 0 on 4. i can connect nd disconnect the battery untill i get to 0 anyway i wonder why the rev counter "does not know where 0 is" even if the electricity is off.

  17. #17
    Evil Twin theruck's Avatar
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    i assume that if you disconnect and connect back the battery your needle stays where it should be right?

  18. #18
    amb67
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    Yeah, always returns to that same spot, every time.

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