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Thread: Scarabeo 50 4t no spark, need debug procedure

  1. #1
    apriliaforum newb
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    Scarabeo 50 4t no spark, need debug procedure

    I bought a 2006 4t and am trying to get it running. I've rebuilt the carb and cleaned the fuel tank, but now I find I have no spark. None. The battery is new and the bike is cranking over fairly fast, but no spark. I've tried to follow some debugging procedures on the internet like this one (http://www.pedparts.co.uk/blog/piagg...-fault-finding) but it does not quite match the bike and so I can't really trust the results. I will say that when I measure the resistance at the connector on the right front side of the case (stator/pickup ?) I get 178 ohms. The wire colors are yellow and brown.

    The plug wire and cap seem to be in excellent condition. No evidence of corrosion, insulation problems, etc. when I removed them.

    The ignition/coil module was made by Ducati. Resistance between the high tension lean and the closest 2 low voltage leads is around 2k ohms, and the farthest 2 leads is around 1 M ohm. Resistance between the first 2 pins is 348 ohms, and between pins 3-4 is infinite.

    Can anybody tell me how to tell why I'm getting no spark?

    Thanks.

  2. #2
    apriliaforum expert
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    the wires going to the cdi should be giving 14-70v of power from the stator. then if the cdi wont spark... better find a new cdi to test it with.
    you can try a new sparkplug and screw the sparkplug wire in all the way at both ends
    --- diploma for engine repair in 2012 ---

    derbi bullet 2006 - piaggio AC - malossi T.C. half - custom GPS dash - TPR 70CC - topperf crank - vl13 reed and spacer- yamaha rt180 kickstand - giannelli shotV4 - phbg 21mm - doppler mesh top venturi filter

    complete wtp volta bmx 2012 - sanko seamless japanese cromoly heat treated and blue printed frame - 21lbs

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    previous vehicles - subaru legacy turbo 1991 - mazda mx6 turbo 1990.

  3. #3
    apriliaforum Member KarimK's Avatar
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    Do a hz reading of the signal wire going to the ignition coil
    2005 Derbi GPR 50 Nude - SR 50 replacement
    80cc Malossi MHR Replica kit
    21mm Polini CP

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