Question about 2000 Yamaha Royal Star Venture

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I have a 1993 veture royal, and after starting it up(after winter storage) it started up, ran for about an hour, then started to miss, the tach would go to down to zero, but the bick keeps running but badly. at 3000 rpms, ans it seems to be missing on one cylinder. If you back off the throttle, the tach works again till you try to add throttle then at 2000 to 3000 rpms it repeats. it also backfires when the trottle is advanced. the warning light is on as well.

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  • duke_mskt May 20, 2011

    did the seafoam thing drained the fuel,put in fresh..no change..

  • duke_mskt May 20, 2011

    i'll check the boots, but it happened as I was cruising along fat dumb and happy...one minute it was fine, the next it was working hard to stay running.....

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This"new" translation JUNK fuel is a real problem-did you use marine stabile when you put it up? If not you need to drain the fuel and change the plugs and get a can of SEAFOAM and add some to your new gas to help clean up your fuel system. Good luck!

Posted on May 20, 2011

  • 1 more comment 
  • John Ziehm
    John Ziehm May 20, 2011

    and plugs? What do the plugs look like now after running it again and putting in new ones? the next thing would be the coil IMO but?

  • John Ziehm
    John Ziehm May 20, 2011

    One more thing it may be is the intake boots on the carbs. You can test that with starting fluid by starting the bike and spraying a little(not too much)! around the boots between the block and carbs-if it picks up and races you need new ones.

  • John Ziehm
    John Ziehm May 20, 2011

    BTDT I would think electrical(coil) but?

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