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Thread: 400EX won't start

  1. #31
    Join Date
    Nov 2007
    Location
    Field, Ontario, Canada
    --
    63
    Well I borrowed the only ones he had (3) and I don't think any work. No idea what sizes they are for one, don't look metric. And I didn't realize the actual head had to be long also. Think I might just have to wait until I go to my dad's sometime, within the next couple months maybe.

    On the carb theres a thin metal hose that goes to the gas tank, is that the one that takes the gas? If I unscrewed that how would I stop the gas pouring out of the tank?

  2. #32
    Join Date
    May 2002
    Location
    Southeastern Wisconsin
    --
    3,658
    Quote Originally Posted by Chillyboarder View Post
    Well I borrowed the only ones he had (3) and I don't think any work. No idea what sizes they are for one, don't look metric. And I didn't realize the actual head had to be long also. Think I might just have to wait until I go to my dad's sometime, within the next couple months maybe.

    On the carb theres a thin metal hose that goes to the gas tank, is that the one that takes the gas? If I unscrewed that how would I stop the gas pouring out of the tank?
    Since you have some time you could just open the drain on the carb and let it run out that way. Maybe put a pan under the machine to catch it and turn the petcock to "reserve" so it drains the most it can. It will take a while but it will work just fine. If you have any friends with ATVs see if they have the little factory tool kit. Chances are that you may be able to use the plug wrench from one of those.

  3. #33
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    Yeah, OldSchoolin is right, it will run now if it ran before. The carb stuff I have talking with you about, will help you fix the problem, so you don't have it in the future.
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  4. #34
    Join Date
    Nov 2007
    Location
    Field, Ontario, Canada
    --
    63
    Ok I'll see if they might.
    I don't have a pan to catch it, would it be ok to leak into the snow/gravel?

  5. #35
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    yes, that would be fine.
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  6. #36
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    Here's a chart showing what all effects jetting. Not trying to confuse you, just trying to show ya it's not as simple as "I put bigger jets in it to make it go faster" like the previous owner had told you he had done to it.

    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  7. #37
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    Somebody will have to resize that pic, I can't.
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  8. #38
    Join Date
    Nov 2007
    Location
    Field, Ontario, Canada
    --
    63
    And so does anybody know how many connections go directly to that carb?

    How would I go about taking the carb off, there's the choke there which is I think my main concern right now.

  9. #39
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    Gas, 2 vents, throttle, drain. The choke is attached and comes off with the carb. I would try draining and putting new gas in it, fully charged battery, new spark plug, and the starting procedure that I explained earlier, before I tear into the carb.
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  10. #40
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    Have you read that link I posted this morning? It's a step by step description to remove the carb.
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  11. #41
    Join Date
    Nov 2007
    Location
    Field, Ontario, Canada
    --
    63
    oh..yeah forgot about that. Hmm, so the manual for this quad would probable show all of this or what?

  12. #42
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    A service manual will. Owners manuals are useless when it comes to actually working on one.
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

  13. #43
    Join Date
    Aug 2006
    Location
    new hampshire
    --
    914
    chilly you should just bring it the dealer.
    1982 ATC 70
    1983 ATC 200E yard rat
    1984 ATC 200X
    1984 ATC 200S (X2)
    1985 ATC 70 (X2)
    1985 ATC 200S
    1985 ATC 250R
    1986 TRX 70
    1986 ATC 350X
    2004 kfx 700 XC
    2006 prarie 700 XC
    2009 Brute Force 750
    2020 CF Moto 600

  14. #44
    Join Date
    Nov 2007
    Location
    Field, Ontario, Canada
    --
    63
    Lol, how much would it cost to diagnose it? 100+?

  15. #45
    Join Date
    Jan 2003
    Location
    NE Arkansas
    --
    2,344
    At least!!!!
    36 yo, Apple geek, married with kids, conservative. If you are a GUN OWNER and not a member of the NRA, SHAME ON YOU! JOIN!

    Gun control is not about guns, it's about CONTROL!

    My Rags
    85 ATC70,85 ATC70,85 ATC110,83 ATC185S,85 ATC250ES,02 400EX,04 Polaris ATP 500
    Past rags:2000 Scrambler 400, 86 350X, 86 250R, 84 200S, 97 ATK260LQ

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