Question about 1996 Honda VT 600 C Shadow

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Is sputtering and backfiring but from carb. its probably running to rich were is the fuel air mixture adjustments

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You need to clean the carb not adjust it.(unless you already have)The jet can become stoped with trash,or the float could be dealing with debris.remove the bowl clean the parts and try again to run it.Just putting cleaner in the fuel will not remove dirt, bugs, or other trash from inside carb.

Posted on Apr 26, 2010


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My 1998 deville will not stay running and it backfires and sputters

Lean air fuel mixture probably , major vacuum leak , low fuel pressure , clogged fuel filter , dirty or bad MAF sensor - mass air flow sensor . Y ou should hook up a fuel pressure gauge an check pressure an flow .Spray starting fluid or carb. cleaner into the engine an see if it starts then .
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I got my carburetor problem fixed but now it runs for a while then starts backfiring it'll shut off let's set for a couple seconds and start right back up can anybody tell me why

That sounds like a fuel/air mixture problem.

Just to confirm .. it is a carburettor, not fuel injection?

As a general rule of thumb (with carburettors..) if it backfires through the exhaust/muffler .. the fuel mixture is too rich.

If it backfires through the carb/air filter, the mixture is too weak.

It could also be a 'sticking' float in the carb.

When an engine is cold the fuel is rich .. lots of fuel .. that's how a choke works.. However, when the engine warms up a rich mixture causes problems. The car may splutter and stall, run sluggish or cut out.

Dec 25, 2015 | Cars & Trucks

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to much air when mixing with fuel in carb find air mixtur screw on carb an whale running turn in slowley till it stops backfiring turning the screw in adjusts the air mixing with fuel the screw is useuly located on the side of the carb witch the toub hooked up to put fuel in carb is
or you could re set it by screwing all the way in then screwing out 3 whole turns then whale running turn out til it back fires then turn screw in haf to three quarters of a turn in hope this helps

Nov 27, 2012 | Motorcycles

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My 1998 Honda Shadow ACE 750 backfires alot when i let off the throttle. What causes this?

Sounds like your fuel air mixture is a little rich. Check your plugs, if they are black you are running rich which will cause some of the excess fuel to be burned off in your exhaust. Two common problems with a bikes fuel air mixture is bad plugs, if one does not fire consistently all the time it will leave excess fuel in the combustion chamber. Another would be a clogged air filter keeping the fuel air mixture unbalanced as well.

Lastly if you are able to, you may adjust your air fuel screws on your carb. However most Honda's are stock with Keihin carburetors and these air fuel screws are plugged so you cannot make adjustments without drilling out the plugs.

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My 1982 Honda 200e starting missing about a month ago, sometimes it will backfire, it runs but poorly, plug was black. Had the fuel changed, carb cleaned and still the same!!

With any naturally aspirated motor, aside from timing, your fuel/air mixture is crucial at part-throttle as well as at wide-open throttle and off-idle. Sounds like your running too lean on the top end and too rich at part-throttle and off-idle. You should focus on either preliminary adjustments to your carbs; rebuilding or replacing them. You may also consider re-metering and re-jetting your carbs.

Jun 07, 2011 | 1974 Honda CB 200

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Hi i have just restored my 1978 ssd darmah and when i downshift i get backfiring can u help

It sounds rich in fuel, try adjusting the screw of the carbs to make the fuel air mixture optimal.

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My 1400 intruder pops and back fires

I think maddogcycle is right. One cylinder is running rich and the other running lean. It seems as though they have not been balanced properly and the mixture not accurately adjusted. The settings on these carburettors are critical and must be adjusted with the proper gauges. I'd advise you to have the carbs cleaned and adjusted and tuned to the engine for balance of inducted air flow and fuel/air ratio (mixture)

Apr 09, 2010 | 1996 Suzuki VS 1400 Intruder

1 Answer

Just bought bike and it has no power . sputters ,smells rich,and backfires with a little throttle in neutral. ordered kn air filter as reg one was dirty butit does the sme thing with filter off. I changed...

the petrol is fairly old any possibly no good so i would change it and once you have if still the same re adjust the air mixture screws if its running to rich with the petrol being that old that wasin in i would also advise removing and cleaning the carbs

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1 Answer

87 325 runs good when

It's the automatic choke!

The choke is "closed" or barely open... When cold, the engine needs a RICH mixture (more gasoline, less air). When the engine warms up, it requires a LEAN mixture (less gas, more air).

It is probably creating BLACK tailpipe smoke ... that means unburnt gasoline. (Blue smoke is OIL, white smoke is WATER).

Put the parking / emergency brake ON.
1. Remove air cleaner assembly from intake, use a carb cleaner spray or throttle body spray cleaner and spray just a little. (AutoZone $5)
2. Find the accelerator2.gif arm under the hood.
3. start car, rev the engine to make sure how to operate the accelerator from under the hood.
4. Carefully spray into carb / throttle body and work the accelerator ... don't let the engine die...
5. Watch out for "backfire"... it may create a small flame out of the carb. It will extinguish itself in one second.

6. You may need to do this two, three times.
7. Add a "complete fuel system2.gif cleaner" to your next tank of gas ($8).

That's it! ... pretty cheap, too.

Hope this helps!

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1 Answer

Tractor Won't start

If you are getting a backfire condition your fuel mixture is too rich. This simply means that your carb needs to be adjusted (Too much fuel to air mixture).

Aug 19, 2009 | Craftsman 21 Hp 42" Deck, Ys 4500 Lawn...

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