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Anonymous Posted on Feb 16, 2012

When take choke off stalls xs1100 1979

Bike runs rich and cant get to idle

5 Related Answers

HDTV GURU

Jay Henderson

  • 261 Answers
  • Posted on Dec 07, 2008

SOURCE: motor bike wont rev above idle weth choke on

This to me sounds like you need a carb cleaning. If you have let the bike sit for an extended time the carberators maybe clogged or gummed up. This has to do with the new gas that is out there now. It is cheap and with the introduction of Ethanol alcohol now it is even worse on being stable for long periods of time. I have seen fuel go bad in as little as 3 weeks.. One quick check you can do is open you fuel tank and smell the fuel. IF it smells like varnish it is probably bad. You can drain the tank and add new fuel and that should solve your problem. Keep in mind, that the carbs need to be drained as well to get the old fuel out of there also. Make sure you have a battery charger going when you start crankin that puppy, because you will need lots of extra juice to get that baby to fire up. If it is starting now and runs on choke, that means your idle jets are clogged. Best repair is to remove carbs and clean idle jet. Unless it is fuel injected.
Let me know how that goes and we can proceed from this point. I am a certified mechanic from MMI as well as a HDTV GURU. Smiles. have a good one.

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Anonymous

  • 1512 Answers
  • Posted on Feb 08, 2009

SOURCE: yzf 250 wont run without the choke

Hi mikelapt
You will have a carby problem. When the choke is one, and different fuel circuit is used. When you turn off the choke, you go back to the idle circuit of the carb is used, when under throttle, main jets kick in. You probably have a blockage in one of these circuits. Strip the carb down, clean with carby cleaner, blow out all air circuits and jets with compressed air, then setup the idle mixture and tick over speed. Always work with fresh fuel, and drain off, discard any fuel older than a couple of months. It goes off, and turns to a gel  like substance that blocks up your carby. Hope this has explained your problem. Happy to talk to you more about it. A FixYa vote is a great reward for for my time taken to explain this to you. Cheers
regards robotek

Anonymous

  • 2 Answers
  • Posted on Feb 16, 2009

SOURCE: yzf 250 wont run without the choke

Your low speed jet is pluged. You will have to remove the carb then remove the screw in the float bowl. You will see a main jet and a pilot jet. You will have to remove the brass plug that covers the air ajust screw. Then turn it in to find out how many turn till it bottom out. Then remove the screw and take carb cleaner and blow out all passages.Then reinstall all jets. Hope this helps.

freetek

Steve Allison

  • 5569 Answers
  • Posted on Apr 26, 2009

SOURCE: bike wont run when choke is at half way setting

Sounds a lot like fouled fuel jets in your carb; you may have a little work to do.
If the jets do not allow sufficient fuel to pass, using the choke can 'cheat' the carburetor by restricting the flow of air and restoring the fuel-air ratio. You can't ignore this problem since the 'cheated' condition does not let the engine develop the power for which it was designed.    

Anonymous

  • 90 Answers
  • Posted on May 31, 2009

SOURCE: 2002 suzuki LS 650 running lean at higher speeds, (off idle)

this prob happens allways in carburated engines that the car or motorcycle is running lean or rich . because the air - fuel mixture ratio is not right . so you should open the carburator and remove the air filter you will find two screws in the lower front section of your caeburator. you can adjust them by a screw driver until your car is smooth

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Related Questions:

0helpful
1answer

Why does my engine die after idling for 30 seconds?

no year told, nor when it last run perfect not told
same answer for 100 years on any otto cycle gas engine made car or motorcycle or scooter.
same., and drives fast too, full power work but idle fails.

well , idle is too rich, as are all carbs this old and never serviced.
when it stalls i bet spark tip is wet with fuel or carbon fouled.

or bad fuel. or caused by bad fuel endless for 100years
ive cleaned like 1000s of carbs in 50+ years. endless. me.
it's only a 150cc engine, and tiny carb. my CB750s old and new.
both had 4 carbs and are tricky and must be synchronized
but your's is a pussyycatt. 1 carb small
causes all.
the float needle is bad causing too high float level.
the jets are bad or wrong or dirty. there may be 2 jets one is idle and bad. but most time not 2, just 1 jet and 1 needle.
the needle can be bad , most are this old and bottom of needle is idle section OF NEEDLE and all worn out and now super rich at idLE SPEED
the air paths inside the body of carb must not be clogged
all tiny air paths. checked and cleaned fully.
that is all I can think off off hand.
my guess is bike is super old.
is bike real honda or this trashy china clones of 80 honda.
no year told nor photo of it so we can ahhhh that BIKE,
THE TANK VIEW IS OMG EASY TO ID.

NOT TOLD , FAILS IDLE HOT AND COLD ENGINE BOTH.
Using throttle grip hold RPM up a tad to get it hot first and see if idle reall fails hot.
first 150cc bike owned ever,?yes
the learn this.
we start with mild choke cold and back it off bit by bit until warm.
the chock has a fast idle features that must not be broken.
back it off slowly for 5 mins. then idle works
some have idle mixture screw on the side or is fast cold idle screw.
the cables are not for idle. ever and are set loose side
a stop screw idle and maybe mixtures idle. tool
depends on year not told if honda mikuni made.
0helpful
1answer

Have a problem with a dr650 went to a full stainless exhaust open up the air box fitted 150 main jet .NOW bike runs rich on idle can turn airscrew home and bike will not stop .Could it be a choke prob

If it is running rich you have the wrong size jet fitted, tuning a DR650 uses jets sizes from about 130 to 180 depending what has been done to the engine & bike
Oct 19, 2014 • Motorcycles
0helpful
1answer

Choke problem

That's an indication that the idle mixture is too lean, as the choke richens up the mixture, allowing it to run.

Your carb should be similar to this:

http://www5.picturepush.com/photo/a/3728808/img/3728808.jpg

The AIR SCREW adjusts the mixture (rich/lean), and the IDLE SCREW adjusts the idle SPEED.

Try screwing in the AIR SCREW 1/2 a turn and see if that helps.
If not, try another 1/2 turn.

Still no idle?

Turn the screw back where it was (1 full turn) and then screw it OUT 1/2 turn, then if not, another 1/2 turn.

Once you have the mixture correct, the idle speed can be set with the IDLE SCREW.
1helpful
2answers

2003 harley 1200 custom sportster with 50 miles strats up fine with choke pulled out. once engine is warm and choke is pushed in 50% bike stalls out. have repalaced gas, spark plugs and just took apart...

A 2003 model with only 50 miles?? Wow....well,since youve already taken the carb apart and cleaned it,did you hook up the vaccum line for the VOES switch on the intake manifold? If so,..when you get the bike running,..spray some brake clean around the intake where it bolts to the heads.If the idle picks up,or starts to sputter,..youve got leaking intake gaskets. Which is a good possibility on a bike that old with that few miles on it.The choke essentailly adds more fuel to the motor,and by what your saying,the bike is obviously running lean. Also,...im ASSUMING that you have fresh gas in it,and the petcock is turned on.
0helpful
2answers

After my bike warms up good it gets real sluggish. It takes about 15 minutes for this to occur. When it happens I have to rev the bike real high or it will die out like its not getting or getting to much...

You didn't say what year or model your bike was but if it runs better when it's cold than it does when it's hot, this is an indication that it's running rich. Does the bike start up and idle without the use of the choke or very little use of the choke? If so, another indication that it's rich. Take the air filter cover and element off, leave the backing plate on, and take the bike for a ride. If it runs better, yet another indicator that it's running too rich. What type of carb is on the bike? This is unusual as most bikes,unless they've been rejetted, are jetted lean and have a nasty habit of spitting back from the carb.

Steve
0helpful
1answer

I have a 1998 kawasaki 1500 classic that runs rich to the point where the fender is turning black. Riders behind say they smell strong odor of unburnt fuel. Bike idles smoothly and does not fog black out...

The easiest way to tell is have a look at the spark plugs and see what colour they are.
The should be a light brown, if black then you are running rich and will need to adjust your carbs.


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Please dont forget to vote this answer was helpful.

Many thanks

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0helpful
1answer

Starts good cold with choke runs bogy until fully

You might be too rich on the pilot jet. (Too large)
Run it for a minute with the choke on, then shut the choke off, and let it run with just a little thrttle till it's warm. If it doesn't "clear" up, your jetting may be off. (The pilot does idle) Pull the plug to see what color it is. Black is too rich. (Too large of a jet)
0helpful
1answer

My 2005 Sherco 290 trials bike stalls when hot

Best would be to blow compressed air to the jets and also to check and reset the float level.
Hope this helps!
0helpful
1answer

Wont run /idle

i'd start with removing the carbs and giving them a thorough cleaning as when bikes sit for so long, the carbs begin to get gummy/varnished from the old gas.

check for blocked holes in the pilot jet & main jet and look for "hard & dried up" gas in passages. be careful of the float bowl gasket as to not tear it or you will need a replacement.
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