Home Forums 2-Cycle Racing smoking Yamaha

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    • #9398
      Colin
      Participant

      Hey guys. I recently fired up my freshly rebuilt Yamaha for the first time. Lots of smoke coming out and wet black oil dripping from exhaust. Any ideas? Did I mix too much oil? 8 ounces in one gallon. Thanks! Colin

    • #9399
      Colin
      Participant

      <div class=”d4p-bbp-quote-title”>Colin wrote:</div>Hey guys. I recently fired up my freshly rebuilt Yamaha for the first time. Lots of smoke coming out and wet black oil dripping from exhaust. Any ideas? Did I mix too much oil? 8 ounces in one gallon. Thanks! Colin

      Also I had the needles set at 2 1/4 and 3/4

    • #9421
      Jim White
      Participant

      If this was just warming up on the stand 2 1/2 on the low is way too much and is probably the problem. On the track under load that settings fine. To just run it on the stand with no load it’s just way rich. I usually warm mine up on the stand at 1 to 1/12 on the low.

    • #9555
      Doug Huggler
      Participant

      the cc fluid may have been dumped into the bottom-end after the rebuild
      this will cause lots of smoke and oil out the pipe.
      2 1/8 and 1/4 should be good for ontrack break-in

      Doug Huggler
      253-219-1011

    • #9560
      John Wehrheim
      Participant

      It will smoke and drip oil until everything is well sealed and you did have the high needle rich if you ask me.

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