Calling Roger Bibbings Calling Roger Bibbings

Forums Technical Two Stroke: Help needed Calling Roger Bibbings Calling Roger Bibbings

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    • #13747
      Rob Lane
      Participant

      Re. your plea in this months magazee (sorry) about cutting out when half warmed up.
      By chance whilst watching my printer printing out instructions for fitting lectronic ignition to my Le Velo, I spotted the words –
      DO NOT REVERSE POLARITY TO THE COIL AS IT WILL OVERHEAT.
      Well you never know, could have happened. I had similar on a cb77, ran a treat till it was really revin then it would drop its head until it cooled.
      Best of Luck Brother.
      Rob
      P.S. Patch this on to him if you know where his is.

    • #13754
      Brian
      Participant

      Have a word with Kevin Bacon. He knows someone, who knows someone, who knows someone, who knows someone, who knows Roger.

    • #13755
      Rob Lane
      Participant

      🙂 Look Brian, I’m the one whose avin a larf, avin a larf, avin a larf.

    • #13825
      Peter Fielding
      Participant

      Don’t think Roger has seen this post but I can answer it on his behalf as he gave me the Vape unit to investigate after he converted his bike back to 6v electrics.
      The cdi unit itself worked fine under test on one of my other bikes. The problem turned out to be the charging coil on the alternator, which is one of the earlier type with an external trigger coil.

      Eventually it failed completely. There were clear signs of corrosion on the whole unit and as the bike was used for MCC type trials and green laneing, I suspect it had been soaked a few times which will not have helped the very fine windings.

      You can buy a replacement stator unit from Vape but its near £90 before you get into the complexities of importing from the EU these days. As an alternative, I converted the unit to a DC cdi system with separate conventional coil and using the original trigger. It works on the bench and the timing seems to be about right. Covid-19 restrictions and the cold weather have prevented a road test but I am hopeful it will work, if so the cost was about £13 for a Chinese made cdi unit.

      The drawback is of course you need a battery as it is no longer a self energising system, but the 12v charging side continues to work fine, the windings on the stator for this are far more robust.

      Helped to pass the time during lockdown.

    • #13826
      Rob Lane
      Participant

      Thanks Peter, good to get the feedback.
      A piece of detective work and as you say, something to pass the current
      excess of time.
      Regards Rob.

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