Question about 1998 Suzuki VZ 800 Marauder

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Cleaned the carbs, changed the plugs gapped at 34

Cleaned the carbs, changed the plugs gapped at 34 bike runs as long as choke pulled out a little would this be air fuel mixture . It also seems i have one cylinder running off #2 Carb that is loading up. also re ran all new fuel lines and used real clamps. New 93 octane in tank with a shot of liquid carb cleaner.

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I would be checking for air leaks, this will give you a lean mixture. In particular look for the seals for the balance tubes and each carb.

Posted on May 04, 2010

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I have a 2003 FXD Superglide with low mileage...it backfires, hestitates and seems to run lean..It runs just fine when I pull out the maunal choke slightly...Is it a carburetor problem or an air mixture...


Your carb probably need going through. I would suspect that it's your accelerator pump has got a few holes in the diaphragm and maybe your slow jet is partially stopped up. If the bike has been sitting for an extended period of time, this is more likely the problem. The air mixture is not adjustable unless you or someone else has removed the "anti-tamper plug" that covers the idle mixture adjustment screw. And, only then if you or someone else has turned the screw. If the fuel air mixture has changed, it's something wrong inside the carb. I'd either take it apart and clean it or get someone else with the proper experience to do it for me.

Good Luck
Steve

Oct 22, 2010 | 2003 Harley Davidson FXD Dyna Super Glide

2 Answers

Air fuel mixture problem


if your plugs are black, the bike is too rich. lean out your mixture screw a little at a time until it seems riight. hard for me to tell you exactly when it's set without me seeing or feeling it myself.

Apr 20, 2010 | 1998 kawasaki ZX-6R Ninja

1 Answer

Raptor 660 2003 choke on bike idles good but when off the bike starts to back fire


Your bike is running too lean. If you have not made any changes to the air intake or exhaust then your pilot jet may have something blocking it. (probably a piece of dirt, or just tarnish build up of fuel if the carbs aren't drained while in storage) By turning the choke on, you are reducing the ammount of air allowed into the "Fuel / Air" Mixture. This allows the bike to idle properly. Once the choke is off, the mixture has too much air and not enough fuel causing the backfire. If you haven't changed anything like the exhaust or air filter it sounds like a good carb cleaning is in order. Otherwise, you will need to change jet sizes to accomodate the difference in air flow.

Jan 10, 2010 | 2004 Yamaha XT 660 R

1 Answer

Choke is working only has 5000km on bike and once bike warms up it loads up wih fuel and then dies out all ports are clean i tore the carb a part 3 times what should the fuel|air screw be set at.it must be...


It seems the carb/s flooding with fuel and thus it dies, try to reset the float pin and get the correct level of the fuel in the float chamber.
Standard procedure for air-mixture screw setting is u take the screw right in slowly taking care not to over tighten it as it may damage the tip of the screw.
Warm up your bike's engine and thn slowly turn anti clockwise the air-mixture screw to about 2 & a half turns and observe the engine's idling.
Before you attempt this setting(air-mixture) its better too, to replace the spark plug and set the gap to the specs of your bike's engine and check and adjust accordingly the valve clearance.
Hope this helps!

Jul 22, 2009 | 2002 Suzuki GZ 250 Marauder

2 Answers

Yr 2000 thundercat, won't idle unless choke fully on


When you cleaned and balanced what did you do and how? Did you clean out tank? Tank filter? Any petcock debree. If this does not work please get back at me for further info.

Jul 07, 2009 | 1999 Yamaha YZF 600 R thunder cat

2 Answers

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.

Mar 20, 2009 | Honda XR 200 Motorcycles

2 Answers

2003 wrf 250 yamaha carb trouble


Just a thought, At first I would suspect low cicuit on carb being plugged or mixture passage. But after reading your cleaning carb I would be inclined to say check your timing as long as you are sure your carb is cleaned well and adjusted.

Feb 05, 2009 | 2003 Yamaha WR 250 F

1 Answer

2003 yamaha wrf 250 carb problem


(1) You will need to adjust the float pin to get the correct amount of fuel in the float chamber of the carburator.
(2) You will also need to set the air-mixture screw , but before you do tht remove the spark plug and see whats the condition of it, is it black , is it brownish, or is it whitish.
If its blackish = means rich too much of fuel, if its browinsh= ok, if its whitish = its too lean.
(3) As for hesitation, check the needle at carbs piston on the accelerator cable, and blow the main jet with high pressure.
(4) Check too the spark plug gap and if its as per the manufacturers specs.

Hope this helps!

Feb 05, 2009 | 2003 Yamaha WR 250 F

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