Tornado died...
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Thread: Tornado died...

  1. #1
    Senior Member ianh's Avatar
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    Tornado died...

    Right then.
    Currently on my hols in Spain and got a call from my son in law.
    The 900 I have lent him just died without warning. Apparently running fine then just cut out, dash dead, tacho stuck on 4k.
    Will check usual culprits, battery connections, fuses etc but any others suggestions welcome.
    Pre Benelli, ZR50SL, RS100, BMW R50/5, RD400, CB350K4, GPZ550, CB900, 750 KATANA, GSXR750, FIREBLADE, TL1000S, 955i Daytona, GSXR 1100L, GSXR1000K6.....

    Now; 2003 900 Tornado, 2008 900 Tornado, 2009 CR 1130, 2010 1130 Tornado...and the diesels...Ducati 848 for when four italians are not enough... a 750 srad ....when 5 italians are too many.......and now an '81 Katana......for those mid life crisis days....

  2. #2
    Senior Member RobShed's Avatar
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    Robin Shedden
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    Soninlawcide

  3. #3
    Senior Member
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    Cam Douglas
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    It's pretty much impossible to diagnose an electrical fault via internet. You need to be there with a multimeter. But total loss of power would seem to indicate a bad battery connection or something similar.

    I'm no electronics expert but the tacho stuck on 4k doesn't sound good. Maybe a power spike went through the system when the power failed. Hopefully it hasn't fried the tacho control circuitry and it'll recover when normal power supply is reinstated.

    Unless your son-in-law knows what he's doing, it might be best if he leaves it alone until you get back from your holiday.

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  5. #4
    Senior Member Engenia's Avatar
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    Errol Kowald
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    Quote Originally Posted by Sprocket View Post
    I'm no electronics expert but the tacho stuck on 4k doesn't sound good.
    That's fine. The tacho drive is a servo motor. When the power is interrupted, it stops where it is. Normally when the ignition is turned off there is still power on the dash and it drives the tacho to zero.

    This is a clue to what's happened - total loss of power. If it was just the battery going open circuit the alternator would keep things running. Mind you, if the battery DID go open circuit and the alternator was at full power there would have been a load dump, and that is bad if the bike electronics isn't designed for it. Every manufacturer knows what to do about load dumps though, so this hasn't been a problem for 20 years.

    My bet is that the main 30 Amp fuse has blown. That would take everything out.
    If it has blown, you need to find out why it blew........
    RobShed, ron d and mihol like this.
    hooroo, Errol www.engenia.com.au [136,351 km - and counting .....]

  6. #5
    Senior Member ianh's Avatar
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    Cheers guys.
    As suspected, the fuse had gone.
    The obvious reason would seem to be that a 10amp one was installed rather than 30amp....!
    No idea why this should be the case but understand it's all sorted now.
    Appreciate the input!
    ron d, RobShed and mihol like this.
    Pre Benelli, ZR50SL, RS100, BMW R50/5, RD400, CB350K4, GPZ550, CB900, 750 KATANA, GSXR750, FIREBLADE, TL1000S, 955i Daytona, GSXR 1100L, GSXR1000K6.....

    Now; 2003 900 Tornado, 2008 900 Tornado, 2009 CR 1130, 2010 1130 Tornado...and the diesels...Ducati 848 for when four italians are not enough... a 750 srad ....when 5 italians are too many.......and now an '81 Katana......for those mid life crisis days....

  7. #6
    Senior Member
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    Cam Douglas
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    Quote Originally Posted by Engenia View Post
    That's fine. The tacho drive is a servo motor. When the power is interrupted, it stops where it is. Normally when the ignition is turned off there is still power on the dash and it drives the tacho to zero
    Well, I did say I didn't know much about electronics. I just learned something about electronic instruments. Thanks Errol.
    ron d likes this.

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