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Carburation problems I have an Intruder 1980 440 that is spitting gas out of the right carb on acceleration causing the machine to bog. What is the problem?

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Hi, It sounds like crank seals or your fuel pump to me. It blows pressure from one cycl to the other, they were known for that.. I would try the fuel pump first. Hope that helps.

Posted on Feb 20, 2009


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I get s flat spot upon stepping on the accelerator, it is petrol engine and has a carburetor(no its EFI)

it has no CARB,
carbs ended here in 1994

scan the pcm ! first.
it will tell you , the reason.
the errors from the Trottle body or the 4 TPS sensors
2 in TB body motor.
2 under rigth foot
if 1 disagrees, PCM goes to limphome and is weak power.

you can NOT fix or diagnose any modern car
lacking a scan tool.

you cant.
hesitation is misfire
and has over 50 causes.

why would I guess.
I won't'
scan it and tell us the bad news.

these words posted here like over 10,000 times
ever do a search.

Feb 25, 2016 | 2006 Suzuki Forenza

1 Answer

Bogs past idle

when you go to acceleration ,there is a power circuit in the carbys that allows for extra fuel to increase the rpms.
it is either a power valve or pump operation. This circuit is not working ( blocked or non-valves not fitted correctly)
if there is no such circuit , there is still a blockage in the main jet and emulsion tube circuits.

Apr 27, 2015 | Tank Motorcycles

2 Answers

2003 Suzuki VS 800 Intruder engine bogging

Hi,before you start takeing the carbs appart just check that the ignition timeing is ok,

Dec 22, 2017 | 2003 Suzuki VS 800 Intruder

1 Answer

My bike is bogging down, drowning plugg in fuel, white smoke & strong smell of fuil from rear cylinder, what could be the problem?

Sounds like the float is sticking in the carb on the rear cylinder,washing the cylinder with fuel,and possibly going into the crankcase oil. The carbs will need to be removed,cleaned,set-up,and synchronized.Be sure to change your oil as well. The gas has most likely mixed with the engine oil,and will cause you to spin a bearing or worse.
Good Luck!

Oct 04, 2012 | 1993 Suzuki VS 800 Intruder

2 Answers

Hd carb idles fine will not advance throttle bogs down

You didn't say what year or model bike it is but I'm going to assume that it has the stock Keihin CV carburetor on it. You need to check two things, the accelerator pump and the slide vacuum diaphragm.

To check these, first take the air filter off but leave the backing plate on the carb. With the engine OFF, crank the throttle wide open while looking into the mouth of the carb. You'll see a brass nozzle just inside the mouth of the carb. When you crank the throttle open, you should see a squirt of fuel come out of this nozzle. If not, you need to replace the diaphragm in the accelerator pump that is on the bottom of the carb float bowl.

If that is working correctly, start the engine and gently rev the engine while watching the slide inside the carb. DO NOT GET YOUR FACE TOO CLOSE TO THE CARB IN THE EVENT THE ENGINE SPITS BACK THROUGH THE CARB. The slide should be moving up and down. If not, the vacuum diaphragm that operates the slide may have a hole in it. You must take the carb off the engine and take the top plate off to get the slide and diaphragm out.

One other thing. If the bike has been sitting for an extended period of time, the jets may be clogged inside of the carb. This will require a complete disassembly of the carb to clean out the jets and the small fuel and air passageways.

Good Luck

Jul 27, 2011 | Harley Davidson FLSTF Fat boy Motorcycles

1 Answer

Wont idle without choke on, pops and spits, front cylinder dose not seen to put ot as much exhaust (force comming out), chrcked timming(good), not sure if i adjusted valves right(set at .0003") like manual...

ur carbs need cleanin or ajustin-take it apart n soak-the idle jet is dirty n not gitten enuf gas and the choke is compensating-remember that ride is almost 14yrs!

Aug 05, 2010 | 1997 Suzuki VS 800 Intruder

4 Answers

Bogs down & spits back through carb.

Sounds like you may need a valve job. Have you been keeping the valve clearances adjusted? It's important to do that on a four-stroke engine. Check your compression to find out if the valves are ok.

Sep 19, 2009 | Polaris ATV

1 Answer

Troy-Bilt TB425CS trimmer hard to start, won't accelerate

Hi the key is moulded as part of the flywheel on most machines these days which doesent take much to sheer off , By the sounds of it this may well be your problem.

Sep 08, 2009 | Troy Bilt Tb425cs 26cc 4 - Cycle Curved -...

1 Answer

95 800 intruder wont start even with battery charger on.

You need a complete tune up and maybe fresh gas. You say uit starts, I would say you dont have a starter problem, rather id say you have a startING problem. You probably have dirty or clogged carb jets and your timeing may be off too.

Sep 07, 2009 | 1995 Suzuki VS 800 Intruder

1 Answer

My 01 yamaha warrior bogging down

Have you changed the spark plugs? If your plugs aren't firing correctly, this can cause the problem. If you have dirty carbs, this can also cause the problem as you will put too much air in and not enough gas.

Mar 11, 2009 | 2002 Yamaha Road Star Warrior

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