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Eva, the ZXR250 bitsa.

Discussion in 'Kawasaki 250cc In-line 4's' started by Wade Wilson, Jan 18, 2014.

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  1. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    Good news everyone.

    A friend of mine who owns a a Yamaha that uses CR9's and he has an entire box of them.

    I threw in some new spark plugs and everything was going great, until the bike got warm.

    The stutter is still there.
     
    Wade Wilson, Jun 21, 2014
    #101
  2. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Have u tested the coils?
     
    GreyImport, Jun 21, 2014
    #102
  3. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    I'll test them tomorrow when there's light.

    I think I have the instructions and ohms readings that i need for them
     
    Wade Wilson, Jun 21, 2014
    #103
  4. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    yea pretty sure its in the manual ..... it could be a coil failing under heat.

    Im sure its been mentioned but make sure 1 coil goes to 1 and 4 and the other coil fires 2 and 3 cylinder.
     
    GreyImport, Jun 21, 2014
    #104
  5. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    Ok, I've popped off the coils and here's the readings.

    Coils 1&4
    Primary windings: 4.1-3.9 ohms (the manual says 2.3-3.5 ohms)
    secondary windings are at 15.07 kohms

    Coil 2&3
    Primary Windings: 3.9-3.7 ohms
    Secondary Windings: Failed to give a reading, the plug end was a bit worn so i cut it off and got some fresh wire exposed. 14.42 kohms
     
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    Wade Wilson, Jun 22, 2014
    #105
  6. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    -EDIT-

    I noticed that one of the leads on coil 2&3 was pretty bad and would only make a connection when angled a specific way, I clipped the bad bit off and put everything back together and now it's making a constant reading.
     
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    Wade Wilson, Jun 22, 2014
    #106
  7. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    How's the stutter after fixing that lead?
     
    Th3_Huntsman, Jun 22, 2014
    #107
  8. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Thats the million dollar question ..... :D
     
    GreyImport, Jun 22, 2014
    #108
  9. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    A mate decided to come over and give me a hand.

    We hooked up the coils. Cleaned the plugs again. Made sure all the resistances were the same after we hooked it all up.

    Then the bike failed to start. Coughing every now and then. But I don't know which coil did which 2 cylinders and which way the black and green and black and red wires go to each coil.

    Tomorrow when there's light I'll check them all again.

    Also what does that pipe on top of the air box do?
     
    Wade Wilson, Jun 22, 2014
    #109
  10. Murdo

    Murdo The Good Doctor Staff Member Contributing Member Ride and Events Crew

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    When testing coils I heat them with a hair dryer until too hot to hold in hand and test them again to see if readings are still within limits.
     
    Murdo, Jun 22, 2014
    #110
  11. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    On the Amodel it is just a fuel overflow outlet. On the c model it serves some purpose I do not know but. Consult the manual.
     
    Th3_Huntsman, Jun 22, 2014
    #111
  12. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    If the coil leads havnt been hacked then 1 will have a short and long lead to reach 1 and 4 and the other will have 2 equal length .....coils are the same anyway

    Heres the wiring schematic from the manual ..... but the color codes dont match yours .....??

    ZXR coil wiring.png
     
    GreyImport, Jun 22, 2014
    #112
  13. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    Those colour codes are the same.

    I'll have a look at it tomorrow when there's a bit more light.

    Right now she doesn't start at all, remember when I had to replace the coils because the spark was too weak to start? I think I'm having the same issue again.

    my mate who was around earlier has a 1996 ZX6R with the same coils as mine, we're going to do a little swap and see if anything works.
     
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    Wade Wilson, Jun 22, 2014
    #113
  14. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    Does anyone know the part number for the coil packs?

    The best I can find is KP02, but they're listed for a ZX6R onwards.

    Are there any aftermarket coils that I can use?
     
    Wade Wilson, Jun 25, 2014
    #114
  15. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    Ive got some documents I'll look thru for you and see if I can find it.
     
    Th3_Huntsman, Jun 25, 2014
    #115
  16. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    My Bike:
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    Ok.

    Today I got 16 spark plugs, 8 of them are CR9E's and 8 are CR8E's, 2 meters of spark lead and I got the bike started again.

    I also found a vacuum leak with a can of aerostart and patched that up to.

    She ran fine for about 10 minutes and then the stutter happened. I kept riding, gave her some throttle and kept going.

    On the way back home, she stalled at a set of lights and refused to start again (thankfully I was about 2 blocks from home.)

    I pulled apart the bike again, and ripped out one of the spark plugs.[​IMG]

    These were brand new plugs half an hour ago.

    She's still running rich. I've already adjusted the floats to 13mm and bench balanced the carbs.

    What should I do?
     
    Wade Wilson, Jul 3, 2014
    #116
  17. Th3_Huntsman

    Th3_Huntsman Senior Member Contributing Member

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    Ummmm that's pretty crazy that it is that rich. Could the pilot screw setting help with this guys?
     
    Th3_Huntsman, Jul 3, 2014
    #117
  18. Wade Wilson

    Wade Wilson Beaяs Premium Member

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    Stock settings for the pilot screw are 2.5 turns out and mine are at 2.
     
    Wade Wilson, Jul 4, 2014
    #118
  19. kiffsta

    kiffsta Senior Member

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    have you tried them at 2.5 turns out ? , all it takes is less then 1/8th of a turn for them to out... so going back to factory would be a good start
     
    kiffsta, Jul 4, 2014
    #119
  20. GreyImport

    GreyImport Administrator Staff Member The Chief Contributing Member

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    Is everything else stock and stock settings? ...as in the pilot jets, main jets , needle clip position?..... air filter?
     
    GreyImport, Jul 4, 2014
    #120
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