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Yamaha atv no idle run's on choke back fire's

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  • Expert
  • 333 Answers

Suggest to clean out your carb first...main jet could be blocked

Posted on Feb 15, 2014

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

  • 9 Answers

SOURCE: won't idle steadily

Check the rubber boot that joins the carby to the engine to often have seen the hose clamps over tightened therefore creating a split in the rubber letting to much air in giving the rough idle eventually you wont be able to start it at all (have a good thorough look inside an outside of boot doesnt take much)

Posted on May 22, 2009

oldfellas
  • 7 Answers

SOURCE: vstar 1100 yamaha will not idle, only runs with full choke

You will most likely find that your Air Cleaner element is blocked & possibly may have sucked up some leaves reducing air flow.
Regards,
Alex

Posted on Jun 20, 2009

MNfisherman
  • 11896 Answers

SOURCE: VT750 2002 when throttle is applied it bogs back

carb needs to be cleaned

Posted on Jun 30, 2009

  • 1 Answer

SOURCE: my 2001 Yamaha YZ 250F won't idle without choke.

did you pull the float pin out and the brass housing that the pin goes in? you may have to clean that and go get some spray brake cleaner with the red straw and blow out all the ports. the reason it will idle with the choke pulled is it shuts off air flow which pulls more fuel to air. without the choke it cant get enough fuel. i would try the bowl again starting with the float and needle. but go ahead and just really clean it all the way through or you will just keep chasing it.

Posted on Jul 15, 2009

DoubleClutch
  • 376 Answers

SOURCE: yamaha xv 1100 virago

To me it sounds like the coil is breaking down and not working at higher RPM's. You can take them off and have them tested at a service shop.

Posted on Dec 12, 2009

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1 Answer

How to Adjust idle circuit? Why does it start, but does not keep running.


2 stroke or 4? if 2 stroke definitely jetted wrong choking makes it rich tells me your main jet is too lean (smaller hole) you need to pull carb check jets for plugage clean jets write down numbers check dealer for correct jet size for your elevation if 4 stroke back fire thru carb indicates timing is off or bad intake valves or cam lobe worn

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Do it start on choke only and will not run when choke is off. carb need to be dip and soaked in carb cleaner , Note Completely apart no rubber or gasket in this solution. Blown out after 4 or five hours of soaking and reassembled.

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Why does my yamaha 660 only run if the choke is on? What causes it to backfire?


Most of the time it's because the Pilot/Idle jet is clogged in the carburetor. This most often happens because of old fuel sitting in the carburetor during long periods of sitting and non-use. The fuel forms a varnish - a gummy layer inside of your carburetor and clogs the tiny holes in the idle jet. Since fuel can't get through, the engine dies. The hole for the choke is larger, therefore the fuel can still get through it.

clogged carb jets Google Search

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1 Answer

Wont idle without choke being used


Main jet dirty. Likely Ethanol fuel fouling. Remove and clean jet. Check all rubber tubing to/from carb for cracks/deterioration and replace.

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Hi, Anonymous for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have a nice day.
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Yamaha XJ700N Service Manual
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I just bought a second hand 05 Yz250f and it cranks on the first kick but will only idle if the choke is on. Back fires on accel and decel with the choke off. Took the carb apart twice and cleaned every...


carb still not clean. sounds like low speed, pilot or fuel screw still not 100% backfiring because it is too lean. wouldn't ride too much uncorrected as it will make engine run hot

Apr 19, 2011 | Yamaha YZ 250 F Motorcycles

2 Answers

Rebuilt all four carbs cleaned and replace needle and seat.Bike runs on choke at idle but will not excelerate,dies when you turn the throttle. feather the throttle past 3000 rpm and it will respond but...


the ajustment need to be set where they were originaly, needle position and mixture screw. the carbs are not suppling enofe fuel, was there any torn seals or diaphrams.

Mar 15, 2010 | 1985 Yamaha FJ 1100

1 Answer

When i start the atv with the choke it stays on , but when the atv is started without the choke it shuts off. My atv is a Yamaha grizzly


The choke should only be used when starting cold. After the bike is warmed up you can turn the choke off. If it keeps shutting off after being warmed up for a few minutes, then check your gas/air ratio for the idle air mixture knob. Loosen it up 1/4 turn to allow more gas to flow.

Oct 20, 2009 | 2004 Yamaha YZ 450 F

1 Answer

Wont idle


lol buddy if its not idling turn the idle screw in until it idles get back to me if no difference 2ee8c57.jpg

Sep 30, 2009 | 1986 Yamaha FZ 750 FM (Japan)

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