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Thread: 350x what gas to run

  1. #1
    Join Date
    Dec 2003
    Location
    Ontario, Canada
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    235

    350x what gas to run

    I got a 86 350x, and its all just been rebuilt, i am woundered what gas i should run now, its has more compression then stock to, i have been running 94 and its flys, i can have 87 gas for free, but should i just pay for the better gas? what do you guys run in your 350x's
    1986 452x, 4inch westcoast swinger, full exhaust, and stage 5 racing kit
    99 honda 300 4x4
    06 Forman 500 4x4
    07 Fourtrax 420 FI

    Previous rides
    81 250r, 83 Cr 250, 85 250 big red, 80 185, 84 200s, 83 KLT 200, 86 Alt 185, 01 WR 250, 83 250r, 84 250r, 1986 350x, 1985 350x, 87 350x, 91 big bear, 01 DS 650, 03 Kodiak 450.

  2. #2
    nitekrawler is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jul 2003
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    430
    I run 91 in my 250r's if that helps
    1982 Honda Atc 250r - Daughter's
    1982 Honda Atc 250r - Son's
    http://forums.atvconnection.com/photos.cfm/ID/1566/#TOP

  3. #3
    hondaatcvabeach is offline At The Back Of The Pack Arm chair racerFirst time rider
    Join Date
    Oct 2003
    Location
    virginia beach
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    241
    I run the best in all of my trikes, the tanks are small and the cost of filling them dosn't kill me.
    1985 Honda 200x (200s motor)
    1984 Honda Big Red (200ES)
    1985 Honda 250SX
    1984 Kawasaki KLT 250
    1984 Honda 70 (Daughters)
    1981 Harley Davidson Roadster
    PROUD TO BE FROM THE LAND OF COTTON
    Check out my units website 3dvirginia.com
    *******GO DIXIE********



  4. #4
    Join Date
    Feb 2004
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    12

    gas

    i would run the best gas u could get untill it gets broken in
    RIDE

  5. #5
    Join Date
    Sep 2002
    Location
    Rittman, Ohio
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    6,276
    Running higher octane than what you need is a total waste of money and will not gain anything. When most of the trikes were built 89 octane leaded gas was pretty standard.
    Increasing compression may require higher octane fuel, depending on how much. If you get 87 octane gas free, Id try it. If it knocks and pings, dump it, and run higher octane fuel.

  6. #6
    nitekrawler is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Jul 2003
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    430
    I thought my manual said to run 91 in mine
    1982 Honda Atc 250r - Daughter's
    1982 Honda Atc 250r - Son's
    http://forums.atvconnection.com/photos.cfm/ID/1566/#TOP

  7. #7
    bbechtel16 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
    Join Date
    Oct 2002
    Location
    Halifax, PA
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    400
    Quote Originally Posted by TimSr
    Running higher octane than what you need is a total waste of money and will not gain anything. When most of the trikes were built 89 octane leaded gas was pretty standard.
    Increasing compression may require higher octane fuel, depending on how much. If you get 87 octane gas free, Id try it. If it knocks and pings, dump it, and run higher octane fuel.
    What he said...
    -'86 ATC 250SX: No longer mine... Complete 350X front end, Corbra Megaphone system, 350X carb with UNI dual stage foam & outerwear bolted driectly up, Powroll/Rocky 260cc bore 10.5 to 1 compression piston.

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