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Thread: 350X stalls when coasting with clutch in?

  1. #1
    Join Date
    Feb 2005
    Location
    Canada
    --
    663

    Question 350X stalls when coasting with clutch in?

    Not sure what could cause this.

    It idles pretty good, but does take a couple seconds to idle down again.

    When coasting in a higher gear with the clutch in sometimes the engine stalls out.

    Any idea what the problem could be?

    Thanks
    1984 Honda 250R
    1985 ATC 250SX
    1985 Tri-Z 250
    1983 Honda 250R
    1986 Honda 350X
    1983 Yamaha Tri-Moto 175
    1983 Honda Big Red 200

    1981 Honda ATC 110

  2. #2
    Join Date
    May 2006
    Location
    N.E. Ohio
    --
    2,005
    Lube the cable while the cap it off the carb inspect the clip and retainer for correct position. Cable lube tools are a $12 item and are very handy. I recommend doing the job loose of carb as you want to flush out the grime and not drip into the carb it self. I use WD40 to the point that it’s running clean throughout the inside and the dirt grim appears out of the cable.
    Hit the clutch side while your at it really helps with pull feel.
    Last edited by Tri-Z 250; 07-06-2020 at 09:29 AM.

  3. #3
    Join Date
    Feb 2005
    Location
    Canada
    --
    663
    Thanks I'll give that a shot.

    Would the mixture screw on the bottom of the carb have anything to do with the engine stalling when not under load?
    1984 Honda 250R
    1985 ATC 250SX
    1985 Tri-Z 250
    1983 Honda 250R
    1986 Honda 350X
    1983 Yamaha Tri-Moto 175
    1983 Honda Big Red 200

    1981 Honda ATC 110

  4. #4
    Join Date
    Oct 2002
    Location
    Northeast
    --
    17,438
    When you're coasting it's your idle/pilot circuit.

    IDK if you have any mods (exhaust/carb/cam/piston etc), but that would be the pilot circuit which is part of the fuel screw too.

    I'd make sure the fuel screw is in correctly screw, spring, washer, o-ring - in that order and gently bottomed then backed out 1.5 to 2 turns. If a pilot requires more than 2 turns out, bump up your pilot 1 size.

    Sounds like you like your idle where it is set now, and don't want to increase it, it's when you coast that it starts acting up. So, you may be too rich or lean in another circuit whereas when you let off and coast, the motor is still dealing with lack of or excess fuel.

    That's my best guess for you, if you have mods or different jets that may be the key...
    All our government does is distract us while they steal from us, misspend our tax $ and ruin our country

  5. #5
    Join Date
    Feb 2005
    Location
    Canada
    --
    663
    Quote Originally Posted by Dirtcrasher View Post
    When you're coasting it's your idle/pilot circuit.

    IDK if you have any mods (exhaust/carb/cam/piston etc), but that would be the pilot circuit which is part of the fuel screw too.

    I'd make sure the fuel screw is in correctly screw, spring, washer, o-ring - in that order and gently bottomed then backed out 1.5 to 2 turns. If a pilot requires more than 2 turns out, bump up your pilot 1 size.

    Sounds like you like your idle where it is set now, and don't want to increase it, it's when you coast that it starts acting up. So, you may be too rich or lean in another circuit whereas when you let off and coast, the motor is still dealing with lack of or excess fuel.

    That's my best guess for you, if you have mods or different jets that may be the key...
    Thanks for the info, the bike is all stock aside from a supertrapp exhaust. I think it has 4 or 5 discs in it and I've heard that that is the closest to how the stock pipe would be.

    I'll adjust the idle screw a a bit. I have the mixture screw set to 1 3/4 turns out as I think that is what the manual said was the factory setting. I guess I may have to adjust that as well to compensate for the exhaust. Would you figure in or out?
    Last edited by Yamaha Tri-Moto; 07-08-2020 at 09:13 PM.
    1984 Honda 250R
    1985 ATC 250SX
    1985 Tri-Z 250
    1983 Honda 250R
    1986 Honda 350X
    1983 Yamaha Tri-Moto 175
    1983 Honda Big Red 200

    1981 Honda ATC 110

  6. #6
    Join Date
    Apr 2014
    Location
    Edmond, KS
    --
    2,531
    I'm guessing that "closest to stock" isn't very close. The original mufflers on these trikes were pretty restrictive. I'm guessing that you'll have to dive into rejetting.

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