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I have a 1980 xs1100 yahama , the carbs were rebuilt and synced , so air gas mixture is good to ! But it runs fine when idle is a little higher by twisting the throttle ....but if I stop at a light and let the throttle sit normally the idle goes lower and lower then dies ! It started up fine right away after it dies but it’s a pain My machanic can’t figure it out but he has tried switching the MDI box and ignition coils to no a avail , he thinks it’s the ignition ....you guys maybe have heard of this issue ? And what fixes it ????

  • Welcome to Motor Vehicle Maintenance & Repair! – Pᴀᴜʟsᴛᴇʀ2 Jul 7 '18 at 2:32
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    adjust the idle speed... is the idle bypass blocked or restricted? – Solar Mike Jul 7 '18 at 7:02
  • Just because the carbs were rebuilt doesnt mean it was correct. My bet would be pilot jet and/or fuel blockage. I assume the aircleaner is clean. Has the bike got high mileage? Does it have good compression? – Sir Swears-a-lot Jul 10 '18 at 12:17
  • Have you made any progress? – Sir Swears-a-lot Jul 22 '18 at 9:35

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