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Thread: Was race gas to blame?

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  1. #1
    Join Date
    Mar 2001
    Location
    Massachusetts - The anti-ATV state!
    Posts
    301

    Question Was race gas to blame?

    Guys-
    I tried running some 100 Octane race gas in my R this weekend. I put MAYBE 1/3 of a tankful of it in, mixed with 2/3 premium gas (93 octane). My R is stock aside from the HRC kit.

    After riding for maybe 15 minutes, and driving the quads to another pit (engine completely cold), it took me almost 50 kicks to get my R started! Once running, it ran fine, although there seemed to be a slight bog with the race gas. Anyways, with the engine hot, the quad fired up with one kick. Then, we drove home. At home (engine cold again), I could NOT start the quad. Me and my friend kicked it like 75 times, no start. I tried with choke (starter enrichment) and with hot start (leans)....no go, not even close. With the tank now less than half full, I topped off the tank with 93 octane, to dilute the race gas. I noticed the exhaust pipe reaked of the race gas...which is green and smells by the way.

    I took the plug out, and it was wet, and maybe a little dark, but not black. I dried the plug off, and cleaned the contacts a little with a piece of paper, and used compressed air to 'dry out' the combustion chamber. Put the plug back in, and it started after about 10 kicks. Let it idle, ran it for a while, shut it off and it started right back up.

    Today, it started after 2 kicks, and the exhaust no longer reeks of that smell.

    Was the race gas causing me to be too rich? Did it foul the plug, making cold starts extremely difficult? Is cleaning the plug good enough, or should I replace it? Is the 10.5:1 compression too low for this mix of race gas?

    Just wondering why the race gas did this. Tx.
    2004 TRX450R - HRC, AC F.Bumper, db Eliminator 2+2, G-Force F/W Spacers.

  2. #2
    Join Date
    Feb 2004
    Location
    Kansas
    Posts
    1,557
    Glad I did not buy some last time @ the dunes then!! Just in case.
    '04 450R
    Special Thanks to:
    JH Racing


    SOLD!!

  3. #3
    Join Date
    Aug 2003
    Location
    Dallas Tx
    Posts
    547
    ive ran race gas in mine and it ran fine but the gas is sort of old
    Caleb Moore-04 450R
    www.akraix.com

    check out The Fallout, coming from Akraix soon.

  4. #4
    Join Date
    Apr 2004
    Location
    KS
    Posts
    82

    110

    I RAN 110 THE BLUE STUFF ALL WEEKEND RUNS EVEN BETTER LESS PINING AT LOW SPEEDS AND EVEN FASTER 3 BIKE S IN THE SAME DRAG BY THE WAY IM ALL STOCK THE ONLY TIME MINE HAS TROUBLE STARTING IS WHEN I WEELIE TOO FAR AND DROP IT BACK IT SEEMS TO FLOOD TOOK 20 TO 30 KICKS HAS HAPPENED A COUPLE OF TIMES. I HAVE ONE ? I STILL HAVE NEVER HERD MY FAN COME ON WHATS THE DEAL?

  5. #5
    Join Date
    Nov 2003
    Location
    New Orleans, Ohio
    Posts
    387
    75 kicks

    10 kicks

    20 kicks


    Sounds like I would be ready for an E start.
    2003 Cannondale Blaze

  6. #6
    Join Date
    Feb 2004
    Location
    Waterloo IL
    Posts
    469
    Originally posted by thomez
    75 kicks

    10 kicks

    20 kicks


    Sounds like I would be ready for an E start.

    Yes because if you have a starter the bike would fire right up with the plug fouled out. Duh.
    2004 TRX450R, HRC equipped, Yosh full system. SOLD
    2003 TRX400EX
    1993 Harley Davidson FXSTC
    1992 Mustang GT 331 Supercharged 6-speed
    1985 Mustang GT
    1985 ATC250R ESR
    1985 ATC350X Restored
    1984 XR500R
    1982 XL500R
    1977 F-150 4x4 4-speed 460
    1976 TT500
    1966 Fairlane

  7. #7
    Join Date
    Nov 2003
    Location
    New Orleans, Ohio
    Posts
    387
    Either way, my leg wouldn't ache.
    2003 Cannondale Blaze

  8. #8
    Join Date
    Jan 2004
    Location
    Manistique, Mi.
    Posts
    395
    The higher the octane the more your engine with think its running rich. Did you try playing around with your fuel screw to see if that helped at the time?

  9. #9
    Join Date
    Feb 2004
    Location
    Waterloo IL
    Posts
    469
    Originally posted by roughrider01
    The higher the octane the more your engine with think its running rich. Did you try playing around with your fuel screw to see if that helped at the time?
    Explain this, it doesn't make sense to me.
    2004 TRX450R, HRC equipped, Yosh full system. SOLD
    2003 TRX400EX
    1993 Harley Davidson FXSTC
    1992 Mustang GT 331 Supercharged 6-speed
    1985 Mustang GT
    1985 ATC250R ESR
    1985 ATC350X Restored
    1984 XR500R
    1982 XL500R
    1977 F-150 4x4 4-speed 460
    1976 TT500
    1966 Fairlane

  10. #10
    Join Date
    Nov 2003
    Location
    New Orleans, Ohio
    Posts
    387
    Actually you need a lot bigger jets to run things like alchy or methanol so ... I would think it is quite the opposite.
    2003 Cannondale Blaze

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