Testing GPZ900R coil

Discussion in 'UK Motorcycles' started by Dr Zoidberg, Sep 1, 2003.

  1. Dr Zoidberg

    Dr Zoidberg Guest

    A friend has a misfiring GPZ which he suspects may be down to the coil being
    on its way out.
    Can anyone with a Haynes BOL tell me what sort of readings I should get
    across it when I wander over with my multimeter?

    Thanks

    --
    Alex
    SRX 400

    "I laugh in the face of danger"

    "Then I hide until it goes away"

    www.drzoidberg.co.uk
     
    Dr Zoidberg, Sep 1, 2003
    #1
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  2. Dr Zoidberg

    PDannyD Guest

    FZS600 Fazer (I'd have thought values would be similar)

    Primary winding = 1.87 to 2.53 Ohms @ 20°C
    Secondary winding (without cap) = 12K to 18K Ohms @ 20°C
    Plug cap resistance = 10K Ohms @ 20°C
     
    PDannyD, Sep 1, 2003
    #2
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  3. Dr Zoidberg

    Dr Zoidberg Guest

    Ta very muchly.

    --
    Alex
    SRX 400

    "I laugh in the face of danger"

    "Then I hide until it goes away"

    www.drzoidberg.co.uk
     
    Dr Zoidberg, Sep 1, 2003
    #3
  4. Dr Zoidberg

    Speedgazebo Guest

    In my experience (which is fairly broad) coils just pack up, they don't
    cause intermittent faults, try the HT leads posible shorting out somewhere.
     
    Speedgazebo, Sep 1, 2003
    #4
  5. Dr Zoidberg

    Gingerposer Guest

    Hope this helps:

    alternator
    alternator output: 25amps @6k rpm, 14v
    stator coil resistance <1.0 ohm
    rotor coil resistance approx 4 ohms

    Ignition:
    pickup coil resistance 390-590 ohms
    pickup coil air gap 0.5-0.9mm (0.019-0.035in)

    Ignition coil
    secondary resistance 10,000-16,000 ohms
    primary resistance 1.8-2.8 ohms


    if he needs more expert help visit the yahoo gpz900r forum, they're very
    helpful.
     
    Gingerposer, Sep 1, 2003
    #5
  6. Dr Zoidberg

    Dr Zoidberg Guest

    Thats great , will give it a look if I need any more help.
    --
    Alex
    SRX 400

    "I laugh in the face of danger"

    "Then I hide until it goes away"

    www.drzoidberg.co.uk
     
    Dr Zoidberg, Sep 1, 2003
    #6
  7. Dr Zoidberg

    A Lee Guest

    Testing the resistance will only tell you if it is completely knackered.
    You need to get it 'load tested' to see if it is OK in use.They can give
    great sparks when the engine is turned over to test it, but at 5000rpm,
    they may be giving a very weak spark.
    A dealer in Leicester does this (Redcar M/cs) for about £20, so it might
    be cheaper to get a 2nd hand one (but again, a 2nd hand one may be no
    better).I'm sure there must be plenty of other places that test them as
    well.
    Alan.
     
    A Lee, Sep 1, 2003
    #7
  8. Related to that...

    I've found that a slightly knackered coil will produce an
    orange-tinged blue spark when the test gap is 10mm or greater. A coil
    in good condition will quite happily send a healthy blue spark leaping
    across a 13mm gap.

    Look for the orange tinge. If it's there, it's not a good sign.

    --

    Dave

    GS 850 x2 / SE 6a
    SbS#6? DIAABTCOD#16 APOSTLE#16? FUB#3
    FUB KotL OSOS#12? UKRMMA#19
     
    Grimly Curmudgeon, Sep 1, 2003
    #8
  9. That is so wrong.

    --

    Dave

    GS 850 x2 / SE 6a
    SbS#6? DIAABTCOD#16 APOSTLE#16? FUB#3
    FUB KotL OSOS#12? UKRMMA#19
     
    Grimly Curmudgeon, Sep 1, 2003
    #9
  10. Dr Zoidberg

    Platypus Guest

    I have a coil that has an intermittent fault, known as "doesn't work
    when it's wet". Something to do with three big lengthways splits in
    it. Fortunately this coil has found a new position as a paperweight, a
    role more suited to its talents.

    --
    Platypus
    VN800 Drifter, R80RT
    DIAABTCOD#2 GPOTHUF#19
    BOTAFOS#6 BOTAFOT#89
    BOB#1 SBS#35 ANORAK#18 TWA#15
    "WOULD YOU KINDLY SHUT THE **** UP!"
     
    Platypus, Sep 1, 2003
    #10
  11. Dr Zoidberg

    Dr Zoidberg. Guest

    Ta very muchly.
    --
    Alex

    "I laugh in the face of danger"

    "Then I hide until it goes away"

    www.drzoidberg.co.uk
     
    Dr Zoidberg., Sep 2, 2003
    #11
  12. Dr Zoidberg

    Dr Zoidberg Guest

    Well if it reads ok one minute then gives widely fluctuating readings the
    next after you have shaken it a bit then it is indeed fucked.
    The other one was perfectly solid so it's definately the coil that was
    causing the two cylinders to misfire.
    Thanks for the replies everyone.

    --
    Alex
    SRX 400

    "I laugh in the face of danger"

    "Then I hide until it goes away"

    www.drzoidberg.co.uk
     
    Dr Zoidberg, Sep 3, 2003
    #12
  13. Dr Zoidberg

    Dr Zoidberg Guest

    We did after we had identified the suspect coil and it confirmed it.
    --
    Alex
    SRX 400

    "I laugh in the face of danger"

    "Then I hide until it goes away"

    www.drzoidberg.co.uk
     
    Dr Zoidberg, Sep 3, 2003
    #13
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