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Thread: carb on 350x

  1. #1
    fxrs is offline New to the board Arm chair racerNew to the board
    Join Date
    Sep 2011
    Location
    marana az
    --
    39

    carb on 350x

    recently acquired a carb off a 400 honda and want to install it on my 85 350x .can somebody lead me in the direction as to what jets might need to be installed to start with.this carb is 2mm bigger than stock.its 36mm at the throtte.thanks for any help

  2. #2
    Join Date
    Feb 2011
    Location
    North Dakota
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    1,643
    I know this dosen't help but I just put my 400ex carb on this past weekend. I did not have to change my jetting as of right now I. It has great throttle response and Really woke up that came and exhaust on my motor. We will see when it warms up if I will need to change my pilot jet. Good luck!

  3. #3
    Join Date
    Jan 2012
    Location
    Salt Lake City, Utah
    --
    84
    X2 ^^ i also put a 400ex carb on my 85 and used the jets that were in my 350x carb.. Ran awesome, no dead spots anywhere.. If you are starting from scratch and still need jet sizes i wouldn't know but hopefully someone who does will chime in.. Maybe send flyingW a pm an he should be able to help you
    ATC 350X-The Oem Piece
    ATC 500R-The Dune Hog
    ATC 70-The Cruzer

  4. #4
    Join Date
    Feb 2013
    Location
    chicago il
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    505
    400 ex is more cc's so need more fuel but not much. if anything would make 350x run rich. the jets have a # stamped on them. see what the 400 carb has and 350x carb. i would say toss it on and ride it for a while and then check your plug. if heavil sooted go with 350x jet or something in between. i imagine 400 carb is bigger (flow more air) so would think 350x jet would be lean. better to be rich than lean.
    Trikes: All Honda: 84 250r, 85 86 and 87 250sx, 84 and 85 125m, 79 82 84 and 85 110's, 73 us 90 and 77 atc90, 75 atc70
    Cycles: Honda: 71 cb100, 78 cb750 coming soon cb750 trike. Yamaha: 67 yds 3 (250cc, 2cyl, 2 stroke), 82 750 SECA
    Other toys: Chenoweth VW sandrail dune buggy, old race go kart, racing mower, 76 Arctic Cat Pantera 440 snowmobile

    KEEP IT ON ALL 3 OR AT LEAST 2 AT A TIME

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