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motorman

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  1. Ossa mar won't rev out

    motorman replied to motorman's topic in Classic Trials
    Thanks for the info , mine is fitted with Motoplat , haven't got round to changing the carb jetting yet. will let you know the result, Cheers Robin

  2. Ossa mar won't rev out

    motorman replied to motorman's topic in Classic Trials

  3. Ossa mar won't rev out

    motorman posted a topic in Classic Trials
    Hi guys, I'm tearing my hair out here ! Have a 77 Ossa MAR 250 which won't rev out. I've tried everything plugs , carburetion , cleaned the exhaust, sent the Motoplat unit away to Spain for repair and testing. Engine is totally rebuilt on new seals and bearings. Everything in tip top condition , but it will only run cleanly to about 3/4 throttle and then misfires and won't rev out. Any ideas ? Cheers.

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