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Bike will not run when choke off. Cannot throttle up without kill

Bike will not run when choke off. Cannot turn throttle without killing bike. Sounds as if it is starving for gas???? 2006 Honda 250 cb Nighthawk.

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6ya6ya
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Posted on Jan 02, 2017

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  • 48 Answers

SOURCE: will only run with full choke and absolutely no throttle.

Carbs gummed up. Need a serious cleaning or a full ruubers replacement/rebuild kit. Gas turns to gummy when left stting in the fuel bowls.

Use a couple of cans of Sea Foam.. best stuff in the world.

Posted on Mar 20, 2009

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SOURCE: bike bogs for second then revs when throttling

Pull the slide out of the carb then remove the jet needle and move the clip one notch lower on the needle.

Posted on Apr 11, 2009

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SOURCE: bike bogs when throttling

Quitting is a no-no. Move the needle clip down one notch and also remove and clean the carb if it has been dieing..

Posted on Apr 11, 2009

  • 86 Answers

SOURCE: 1993 Honda Nighthawk Stalls w/out choke on

make certain it has compression and has spark and is getting plenty of fuel and the air filter is clean. clean carbs air filter and fuel filter and new plugs.

Posted on May 27, 2009

reuben538
  • 4 Answers

SOURCE: full rev as soon as fires up, cant shut down

i have never heard of it not shutting down when the plug cap is pulled.... but clean your carb.... its probably just a stuck float or something really easy to do

Posted on Aug 14, 2009

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1 Answer

Turns over but dose not start, spark plug sparking ok


Check you have petrol if the bike has not been run for sometime replace the fuel. Petrol ages and causes all manner of problems.
Are you trying to start the bike but it has gone onto reserve, move the fuel tap to the reserve position then try to start it. If the above fails, then try these:-
Is the spark plug wet when removed. If dry it sounds like the petrol is not getting through. Try opening the filler cap and leave it open, make sure the kill switch is in the run position. Try starting with the throttle full open. Does the bike have a manual choke try to start with the throttle shut, choke off, then full on, then while continuing to turn over move the choke lever in stages from fully on to fully off. I find on my Yam TW125 (winter and bad weather hack) that if I have not used it for a while sharp twist the throttle a couple of times no more than a third of a turn. Hope this helps.

Apr 08, 2014 | 2009 Daelim Roadwin R 125 FI

1 Answer

When I try to start my 1994 WR250, 2 stroke, it takes a million kicks, or 3 or 4 good pushes down a steep hill, popping the clutch. When I do get it started, once it warms up it will idle, and start back...


Sounds like a combination of leaking fuel tap and old fuel.

When you park it overnight or longer, pull the fuel hose off the carb , and drain the carb bowl.
So when you next ride it, reconnnect the fuel line, turn on the fuel tap long enough to fill the carb, 10 secs,then turn it off to start the bike, turn it back on when the bike starts.
even if you replace the fuel tap this process can help.


I have a 91 wr still sitting under the house from younger times, and yes very good bike

Aug 13, 2011 | Yamaha WR 250 F Motorcycles

2 Answers

Bike has been sitting for only 2 months. Will start with choke on, running around 3500-4500 rpms. Once I take the choke off, it immediately dies. Also when it is running with the choke on, a slight roll...


This is probably a blocked idle jet in the carb, caused by standing and fuel gumming the jets up. The jet that the choke uses will allow it to run, but go to normal running and the idle jet is failing. You MIGHT get away with emptying the tank and getting some (expensive) fuel antifreeze (This is ethol alchohol they use in race cars) run through the bike. It might just melt the gumk and clean things out. If it doesn't, then its probably carb off and strip time :-(

Feb 09, 2011 | 2002 Suzuki GS 500 E

1 Answer

My 2003 softail won't start or idle without using choke or throttle, runs fine at speed with throttle but letting off throttle kills it every time. thought about idle mixture screw, but I come from a...


Sounds like the carbs idle circuit are clogged from sitting or bad fuel . Try Some carb cleaner in it an see what it does after a tank fuel . Or take to a Harley shop to let a tech check the carbs an maybe give it a tune-up.

Oct 08, 2010 | 2003 Harley Davidson FXST Softail Standard

1 Answer

2002 honda shadow deluxe custom 750. 100 miles only on this 8yr old bike. When trying to start the bike pull the choke hit the start button and sometimes it would start most of the time engine turns but no...


Sounds like the battery may be weak, recharge and test, maybe replace. As far as starting, most Hondas will not start if you open the throttle any at all. Shadows being liquid cooled are generally cold natured, but you should be able to ride away with the choke on in 1 or 2 minutes, you might have to ride as far as 4 or 5 miles at highway speed before you can take the choke fully off. If it is taking longer than these times, you will need to remove and clean the carbs. the low speed jets may be partially blocked up.

Apr 08, 2010 | 2002 Honda VT 750 DC Shadow Spirit

1 Answer

Ltz 250 wont idle needs full choke to run.cleaned carb all jets new diaphrams. cleaned air filter and all hoses. backfires and hesitates half and full throttle.


hi,sounds to me like the air fuel ratio is all up the ***,locate the air/fuel screw on the carb(normally on the side)screw the screw right in untill it stops,then back the screw out 1.5 turns,this should get the bike to run without the choke,once you have the bike running simply turn the screw in or out untill the bike settles into a nice steady idle,should be good to go,hope this helps...cheers

Mar 22, 2010 | 2005 Suzuki 250 SB

1 Answer

When I rev the throttle it kills the bike. But


You carburator needs cleaning, or needs to be adjusted. Do you have fresh gas in the tank? Did you mess with the jets, or any adjustments on the carb? You're just not getting enough gas when you open the throtle, and having the Choke on will give you more gas.

Oct 19, 2009 | 2005 Honda CRF 250 X

1 Answer

Bike will crank with choke and idle. Will not run without choke. Will rev to a point, but then sputters and will kill if throttle is not released.


Sounds like you have carb problems. You need to remove the carb and dismantle it completely and clean and adjust it.

Oct 18, 2009 | 2005 Yamaha TT-R 125 LE

2 Answers

Hard starting, dies when throttle opened quickly.


Sounds like a kill switch is going bad or ignition wire getting grounded along the frame or elsewhere. A bad ignition switch can do the same thing. Check the side stand kill switch if your bike has one. Check all electrical connectors. A loose or dirty connection can screw up the works.

Please rate this solution. Thanks allarismith!

Apr 02, 2009 | 1990 Yamaha XT 600 E

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