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Thread: Carb Jetting 101: Terms, Tips and Jetting Theory

  1. #61
    Join Date
    Sep 2004
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    Just let off the gas and kill the motor. Automatics will coast in gear.

  2. #62
    stoney420's Avatar
    stoney420 is offline At The Back Of The Pack Arm chair racerAt the back of the pack
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    oh ok thanx, i figured it would lock up when u hit the kill switch cause u cant push it when its in gear..

  3. #63
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    I'm not an auto expert but the couple I've had would roll in gear. Try it going slow first I guess.

  4. #64
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    Feb 2006
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    Central Florida
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    i chop the autos in nuetral - seems to work fine.

    also - I wanted to add some more info on the plug reading. http://www.4secondsflat.com/Spark_plug_reading.html it is not for dirt, but helpful no doubt

    frankencelery - did you get that fixed? sounds like a needle diameter prob. look at the keihin page posted earlier

    good work, dammit!
    quiet people seem intelligent

  5. #65
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    Jun 2005
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    Des Moines, IA
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    No, I never did. My 200s hasn't been run for awhile, and I've been trying to replace a tire that doesn't hold air, so I haven't gotten back to it. I think I'll try putting that 38 pilot jet back in when I get around to it.
    Quote Originally Posted by fabiodriven View Post
    God knows they're not looking to make any effort to do anything, never mind move their foot to shift. If there was something that dispensed Cheetos every time they shifted that might be a different story. Welcome to America, where the biggest is best and even fat people who are too lazy to shift can climb a mountain.

  6. #66
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    Oct 2007
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    1985 200x bored two sizes over, no air box lid, cobra exhaust. i'm prolly 100 feet below sea level or so, what should my carb settings be?

    i know all trikes are different, but if i could get just a general idea.

    main jet, pilot jet, air/fuel and needle position?
    Feedback thread: http://www.3wheelerworldforums.com/s...ad.php?t=78535

    Patiently waiting..

  7. #67
    big schott's Avatar
    big schott is offline At The Back Of The Pack Arm chair racerFirst time rider
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    I am working on a 1984 Big Red for a friend. The carb needed cleaning and I went through everything like I have 10 or 15 times before (on other machines).
    The 200 starts everytime on the first pull and does not need the choke (odd for Minnesota in Oct). I took it for a ride this afternoon and found it to sputter at 1/4 and 1/2 throttle and it did not seem to run good at top end (Air Fuel needle at 1 1/2). I set the air/fuel at 3/4 and it ran better. But when I turned the needel in all the way it runs good. I know that you should not run anything with the needle in all the way so that is why I have the Q?.

    What do I need to do?

    1978 Honda 90 / 1979 Honda 110 / 1983 Honda 110 Racer (in the Works)
    1973 Honda 70 / 1983 Honda 70 / 1983 Honda X-mas special / 1984 Honda 70 / 1985 Honda 70
    1985 Honda 200X Stock Original
    1985 Honda 350X
    1985 Honda 250R
    1986 Honda 350X
    1987 Honda 250SX

  8. #68
    big schott's Avatar
    big schott is offline At The Back Of The Pack Arm chair racerFirst time rider
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    I never thought about the air filter. I'll put on a new one, and I was thinking about the resetting of the needel.
    I'll do this this week and let you know what I find.

    THANKS!!

    1978 Honda 90 / 1979 Honda 110 / 1983 Honda 110 Racer (in the Works)
    1973 Honda 70 / 1983 Honda 70 / 1983 Honda X-mas special / 1984 Honda 70 / 1985 Honda 70
    1985 Honda 200X Stock Original
    1985 Honda 350X
    1985 Honda 250R
    1986 Honda 350X
    1987 Honda 250SX

  9. #69
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    Nov 2007
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    USA
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    need a carb for a ATC Big Red 1984 model 200es this machine set for 10years keeps filing plugs?\Thanks Mitch

  10. #70
    Danold's Avatar
    Danold is offline At The Back Of The Pack Arm chair racerFirst time rider
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    so I just got my 85 x done and im stoaked. The only problem i am having is it not running past 1/4 throttle and just bogs and sputters. It also will not idle.

    However, when I put the chocke on it revs all the way out and revs quik and idles high.

    I havent really messed with it because of not knowing where to start. But mabye one of you guys could help me out?
    85 200x
    85 Tri-z
    86 Bigred
    81 Rm60
    John Deere racing tractor

    Quote Originally Posted by wad
    sorry dude mine are all shitters lol

  11. #71
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    That would meen your running to lean. (choke richens it up) Pick up a larger main jet and move your needle clip down (raising the needle)

  12. #72
    Danold's Avatar
    Danold is offline At The Back Of The Pack Arm chair racerFirst time rider
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    ok ill give it a try. I was thinking it was runnig rich becuase when it was missing it was plowing greenish black smoke. It just looked greenish mabye color blind or somthing. Thanx for the help.
    85 200x
    85 Tri-z
    86 Bigred
    81 Rm60
    John Deere racing tractor

    Quote Originally Posted by wad
    sorry dude mine are all shitters lol

  13. #73
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    Sep 2005
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    San Diego
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    Usually if the engine seems to run better WITH the choke, it indicates that the pilot jet is plugged up or way too small, not the main jet. This does not mean that you may also have issues with the proper main jet size.

    Avoid making numerous changes at once. Change one component at a time. This will aid in figuring out which circuit is causing the problem/s.

    Good luck and ride safely

  14. #74
    Danold's Avatar
    Danold is offline At The Back Of The Pack Arm chair racerFirst time rider
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    got it fixed. The choke was messed up and wouldnt stay open. Also the main was bent from over tightening.
    85 200x
    85 Tri-z
    86 Bigred
    81 Rm60
    John Deere racing tractor

    Quote Originally Posted by wad
    sorry dude mine are all shitters lol

  15. #75
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    "When adjusting the air screw, tightening the screw is richer and loosening it is leaner. This is because tightening the screw allows less air to pass (resulting in more fuel in the mixture which = richer), loosening it lets more air through."

    I don't really understand that because I checked at my carb and by tightening the air screw it raises up the throttle valve so I was thinking that it allows to let more air to pass and so it's leaner... could you explain where I am wrong ?

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