Pick up coil

Discussion in 'How To Guides' started by aquaant03, May 17, 2020.

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  1. May 17, 2020 #1

    aquaant03

    aquaant03

    aquaant03

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    Hi,
    Bikes been running fine but now no spark, I've removed the pickup coil and have no resistance measurement at all.
    I assume its knackered?

    Does anyone have a good single coil or know where to get one from?

    Regards
    Tony
     
  2. May 17, 2020 #2

    Fire-medic

    Fire-medic

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  3. May 18, 2020 #3

    aquaant03

    aquaant03

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    Hi it's the single coil, although I bought it as an 89 from DK.
    Interestingly the wires had been spliced previously, I cut and reconnected them and I got a resistance measure, I then warmed it as I had seen on you tube and no measurement, it cooled and came back.
    I have seen that the xvz1300 coil is the same, si I've worded it from DK, just hope it works?
     
  4. May 18, 2020 #4

    Fire-medic

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    Loss of continuity when hot is a common problem with the VMax pick-up coil if it's bad.

    How-many wires do you have for your pick-up coil? The early 1985-'89 has 5 wires in a six-wire M-F nylon connector block. The 1990-'07 has two wires in a two-wire M-F connector. The rotor has to be changed if you're going to convert an early ignition to the later ignition, the CDI box too.
     
    Last edited: May 23, 2020 at 6:23 PM
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  5. May 18, 2020 #5

    aquaant03

    aquaant03

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    Hi,
    Its 2 wires.
     
  6. May 18, 2020 #6

    Fire-medic

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    See this.

    VMax early pick-up coil 1985-89.jpg VMax late pick-up coil 1990-up.jpg
     
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  7. May 23, 2020 at 10:08 AM #7

    aquaant03

    aquaant03

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    Hi,
    Is the pic for a pre 1990 bike?
    Anyway the XVZ1300 coil has arrived and it measures 211ohms?
    Fitted it and it still wont start but backfires, I've now ordered a new OEM old stock coil, hope that sorts it?
     
  8. May 23, 2020 at 6:20 PM #8

    Fire-medic

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    A dime to a dollar, I bet you have crossed the coil connectors. In front, the right coil fires the left cyl, the left coil fires the right cylinder.

    OK, look at the first pic, how-many wires do you see to the molex plug? Answer: Five (85-89 ignition) There are five wires into a six-space white nylon plug.

    How-many wires for the pick-up coil to the molex plug in the second picture? Answer: Two (1990-2007)

    Please read the masking tape labels, that's why they're labelled.

    I am not an electrical engineer, that would be my beloved wife (over 40 years as an E.E.) but I suspect that presenting an electrical resistance nearly-twice what the OEM stock ignition box is expecting to-read, is going to cause problems, if not now, when you try to use that Venture pick-up coil, then later. If you choose to use an incorrect electrical component, do-not be surprised when your electronic ignition box greets-you with wisps of white smoke, an acrid unpleasant smell, and a rapidly-overheated plastic case!
     
    Last edited: May 23, 2020 at 6:28 PM
  9. May 24, 2020 at 5:52 AM #9

    aquaant03

    aquaant03

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    Thank you for the clarification , I considered the XVZ coil after looking at the following site
    https://www.hpi.be/pickup.php

    The bottom coil listed is for both the Vmax and XVZ, their resistance measurement table shows 100 ohms, the one I bought is double which must mean its shot, I'll send it back to DK.

    Ref your pics, I understand that now, as I stated earlier mine is the 2 wire one, and the only connectors that I disconnected were to the 2 rear ignition coils and the pick up coil, so I know I haven't mixed them up?
     
  10. May 24, 2020 at 6:07 AM #10

    Fire-medic

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    P4901 74mm 13mm 3mm 100Ω

    That's what you have but the resistance reads 200+ ohms? That's out-of-spec. It's not that it's 'shot,' it's just not what your needs are. Are you using a better-quality digital multimeter?

    Yes you said yours is the 2-wire, for 1990-2007. What is the serial # on your engine case? What year is your machine, from the info on the steering head?
     

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