Question about 1998 Suzuki VZ 800 Marauder

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Low speed miss 02 vz800

Only misses at low speed (less than 40) Disabled the pare valve to get rid of backfire during deceleration.

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6ya6ya
  • 2 Answers

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Posted on Jan 02, 2017

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Benimur
  • 6966 Answers

SOURCE: i have a 99 vz800 suzuki back firing when i decelerate

Hi and welcome to FixYa,

In the versions we have worked on, almost always, your description indicates too lean a mixture on at least one of the carbs (chances are the one for the front cylinder). Considering that it has not been used for over a year, the carbs would need to be pulled down and cleaned. Old/stale gas would have coated the inside of the carbs with varnish like substance. This would be blocking the ports, holes, jets, slides and definitely, the bowl, walls and floats. Other than the above, the fuel pump/regulator would also have to be considered.

Incidentally, I was made to understand that certain versions has had known issues with the carbs and a recall was done.

Good luck and thank you for using FixYa.

Posted on Apr 25, 2009

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  • 635 Answers

SOURCE: backfiring on deceleration from exhaust pipes

May be running too lean or too rich. Check the color of your plugs, black dry and sooty means they are rich, white with blisters lean.

Posted on Apr 03, 2010

sisadsl
  • 1508 Answers

SOURCE: backfireing when decelerating

it can be caused by a number of things including.
lean mixture--air leak intake or exhaust,
leak in exhaust gasket
low ignition voltage- bad plug,lead\resister cap
tight valve clearance
and a number of less likely problems like faulty kill switch, ignition switch\cable connecter,igniter.
If it is not the standard exhaust, the jetting may need a slight change

So first give it a tune and service, check valve clearances,new aircleaner, drain carbs, tighten exhaust bolts and clamps, intake clamps and bolts,it may need exhaust gaskets

Posted on Jul 08, 2010

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- Rough idle, stalls or misses.
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Backfireing when decelerating


it can be caused by a number of things including.
lean mixture--air leak intake or exhaust,
leak in exhaust gasket
low ignition voltage- bad plug,lead\resister cap
tight valve clearance
and a number of less likely problems like faulty kill switch, ignition switch\cable connecter,igniter.
If it is not the standard exhaust, the jetting may need a slight change

So first give it a tune and service, check valve clearances,new aircleaner, drain carbs, tighten exhaust bolts and clamps, intake clamps and bolts,it may need exhaust gaskets

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1 Answer

Backfire through the intake at cruising speed, or idling, also backfire through exhaust when decelerating Runs fine during hard acceleration. Thought it was water in fuel, but dry gas did not solve the...


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Lean, or spark control problem, valve problem, bad fuel, plugged carburetor.

Exhaust:
excessively lean or rich with exhaust leak, valve problem, spark control problem.



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97 VZ800 missing


Check valve clearance, as vlaves wear the gap closes, most riders don't bother to adjust them till they have a problem like this.... By the way the valve may be part of the issue for backfiring while deccerating but Pipes cause this.

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3 Answers

Backfires during deceleration


Check a spark plug for color. A white plug means that it's too lean (Not enough fuel) They will pop when lean on decel!

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