Question about Honda 2005 TRX 400EX

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Why won't it idle without choke?

Carb is clean, seal to motor is tight, fuel/air screw doesn't change anything, new plug, new gas, new oil and filter, sprayed starting fluid to check for air leaks.

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Idle circuit in carb is blocked, strip carb and give a good clean with carb clean.

Posted on Mar 29, 2015

  • Mark Danielson
    Mark Danielson Mar 29, 2015

    Appreciate the answer. Had it figured out, just fine tuning now. Might be back with more questions.

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Fuel supply problem somewhere. How is the float adjustment and the float valve? I'd guess the level adjustment is too low.

Posted on Mar 28, 2015

  • Mark Danielson
    Mark Danielson Mar 29, 2015

    Thanks. Wasn't the problem, but while I had carb apart again I rechecked jets and one had plugged up again.

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Your air/fuel mixture is incorrect, more than likely to lean

1, check your air breather and filter
2, check your pcv valve
3, check that you spark plug is clean an properly gaped
4, check float level
5, check mixture jets
6, check needle valve and seat
7, check to see that your ignition timing is correct and your flywheel key is undamaged.
8, check to see that you throttle plate and or cable are not sticking
9, low grade fuel
10, water in fuel
to remedy the last two conditions add 2 ounces of Seafoam per gallon to your gas tank


Why won't it idle without choke? - 25613609-hkho0ap3yt0oux1ztec50mbv-3-0.jpg

Posted on Mar 29, 2015

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Posted on Jan 02, 2017

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