TS125 won't start – ideas??

Forums Technical Two Stroke: Help needed TS125 won't start – ideas??

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    • #4964
      nigelphoto
      Participant

      I have bought a doer-upper 1986 TS125 from another Member of the MZ Riders Club and I am having a problem starting it. I have completely washed out the tank, new petcock, cleaned out and reset the carb. On kick over there seems to be plenty of compression. I have checked the contacts (condition – not pitted, correct gap etc) but I don’t have a timing disk although it seems to be opening about the right amount from tdc as far as I can tell (pencil down plug hole and all that!!) and there is a nice fat blue-coloured spark with the plug lying on the fins. I carried out the correct starting procedure; the plug is wet and I can smell petrol when I take it out so I don’t think its the carb. I have also tried a brand new plug and Easy Start – not even a hint of firing.

      Answers on a postcard please . . . . . . . or on here would be even more welcome!!.

      • This topic was modified 6 years, 7 months ago by nigelphoto.
    • #4966
      Anonymous
      Inactive

      Mine (TS250) took a bit of coaxing too. Once the plug was wet, I turned the ign off gave it full throttle and kicked it over 6 times. It fired next go.
      Jon

    • #4967
      nigelphoto
      Participant

      I put in a brand new plug after the one in there got wetted, but still not even a hint of starting. How do I tell if the spark might be failing under compression? I once witnessed a rally mechanic working on a Lotus Cortina engine with a misfire hold the plug with one hand and stick a finger from the other hand up the HT cap – ‘that ones firing OK’ was all he said but he was jerking about like the Policeman in Punch and Judy!

    • #4968
      Anonymous
      Inactive

      You can get a tool that is a variable gap that fits inside the the HT lead so the spark has to jump twice, and you can see the 1st jump. I have one
      Jon

    • #4976
      nigelphoto
      Participant

      Hi Jon, I wonder if you would be so kind as to tell me what this spark tool is called so I can get one? At the moment I have stripped the carb as I noticed the choke mechanism is worn and sticks badly. The adjuster is also broken so I will have to replace that.

    • #4977
      Anonymous
      Inactive

      send me an email address and I will photograph it for you
      Jon

      • #4978
        nigelphoto
        Participant

        Thanks Jon nwshuttleworth@gmail.com

        I’ve actually got the carb in bits all over my bench at the moment as I discovered the adjuster to the choke cable was broken off and obviously this isn’t helping the non-starting situation!

        Look forward to hearing from you

        Nigel

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