Yamaha Rt 3 dual spark plug

Discussion in 'Old's Cool' started by Williamldarby, Mar 15, 2013.

  1. Williamldarby

    Williamldarby Adventurer

    Joined:
    Mar 8, 2013
    Oddometer:
    12
    Ok so I got to thinking. I have two spark plugs in my motorcycle and I only use one at a time. Is there anyway to run both st the same time for better fuel burn. Just wondering if anyone has ever tryed.
    Best Regards
    -William
    #1
  2. concours

    concours WFO for 41 years

    Joined:
    Dec 2, 2008
    Oddometer:
    5,456
    Location:
    Kensington, NH USA
    It was all tried 40 years ago. No (perceivable) advantage
    #2
  3. concours

    concours WFO for 41 years

    Joined:
    Dec 2, 2008
    Oddometer:
    5,456
    Location:
    Kensington, NH USA
    A decompressor was available aftermarket for those struggling with the big RT, it fit in that second hole.
    #3
  4. anotherguy

    anotherguy Long timer

    Joined:
    Jun 18, 2009
    Oddometer:
    6,637
    Location:
    the hills
    With two plugs you can retard the timing and still get a complete burn. Two advantages,one is easier starting on a big bore smoker and two,if you can only find shit gas it'll burn it w/o detonation.
    #4
  5. cam14

    cam14 Been here awhile

    Joined:
    Jun 27, 2010
    Oddometer:
    222
    Location:
    Texas
    off topic, the second plug in the modern hemi is a "waste" spark for emisions.
    #5
  6. Williamldarby

    Williamldarby Adventurer

    Joined:
    Mar 8, 2013
    Oddometer:
    12
    I would live to run more plugs for Easyier starting and more complete burn how would I go about setting that up
    #6
  7. anotherguy

    anotherguy Long timer

    Joined:
    Jun 18, 2009
    Oddometer:
    6,637
    Location:
    the hills
    What bike?
    #7
  8. Williamldarby

    Williamldarby Adventurer

    Joined:
    Mar 8, 2013
    Oddometer:
    12
    Rt 3 yamaha already has two plugs
    #8
  9. anotherguy

    anotherguy Long timer

    Joined:
    Jun 18, 2009
    Oddometer:
    6,637
    Location:
    the hills
    Beyond two there's no real improvement. Give the bike a good tune up and get the jetting spot on and she'll start and run well. Took quite a while to sort out my YZ465 but it's a 3 kick bike from cold and one kicker hot. And it only has one plug.

    After some thought your bike currently runs two plug but only one is hot? You'll need another coil and high tension lead.
    #9