Question about 1998 Yamaha FZS 400 Fazer

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Oil in carb bowl and smoking alot after summer storage

I have a 2004 yamaha sx venom sled, any ideas

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  • Chris Kennedy Jan 24, 2009

    Do you mean the PVC valve, if not what is the PC valve and where is it located, thanks so much for your help.

  • Chris Kennedy Jan 25, 2009

    Thanks will check it out.



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Pc valve may be stuck.

Posted on Jan 24, 2009

  • Troy Bennett Jan 25, 2009

    It is the PVC valve sorry. There is a black hose coming out of valve cover on top of engine. it may be blowing oil back into the carburetor.



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Fuel leaking from r1 carb intakes

Hi, Anonymous and the usual suspects are:
1. Damaged or restricted fuel tank venting system.
2. Loose float bowl screws.
3. Damaged float bowl o-ring.
4. improper fuel level in the float bowl.
5. Worn or dirty inlet valve or seat.
6. Damaged or leaking float assembly.
7. Particle contamination in inlet fitting cavity.
For more information about your issue and valuable "FREE" downloads that you will need please click on the links below. Good luck and have nice a day.
Carbs leaking Here is how to fix it
2004 2005 Yamaha YZF R1 Service Manual R1 Moto Data Project
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May 11, 2012 | Yamaha YZF-R1 Motorcycles

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I need to know the correct carburetor float level for a 2005 ktm 65 sx

All carburators work axcitly the same . The float level is dertermined by the amount of fuel in the float bowl . When the fuel level reaches a point in the bowl the floats rise and shut of the neddle valve until the engine can draw enough fuel out of the bowl to drop the floats so the neddle valve opens again to supply the bowl with fuel to make the engine run its fool proof . If your haveing an over flow issue where fuel is running out the tube on the sides then pull the carb and clean it you shouldn;t need any parts just a can of carb cleaner and always clean the air filter that how dirt gets in .Good luck with it

Jul 10, 2011 | 2005 KTM 65 SX

1 Answer

2002 yamaha wolverine 350 4x4 fuel mixture screw has to be adjusted way out to run right carb is clean and if turned out 2 turns it will pop in exhust and cut off when you stop. Cant turn out enough to...

turning the screw way out makes the mixture lean, so the problem must be the carb is too rich.
check all the jets were installed correctly when the carb was cleaned
make sure the carb float bowl is not flooding.
Check the fuel tap is working correctly.
make certain the airfilter is clean.
check the engine has correct amount of clean oil( not fuel contaminated)

Jun 21, 2011 | 1986 Yamaha RD 350

1 Answer

When I start the bike from cold I get a srong smell of fuel and alot of smoke, goes away after a few minutes is this a problem or is it normal?

this is not normal!!..sounds like it could be the choke that wants looking at on the carb...what sort of smoke?...oil smoke or just over fuleing smoke? does want checking out either way!!

Jan 28, 2010 | 1997 Yamaha TDM 850

1 Answer

Wondering what the carb settings are for a 1983 yz250 my plug is fouling, i just put in a new one and it still fouled, its wet when i take it out, too much gas maybe? the bike smokes alot when i start it,...

The header says it is a 2004 YZ250F. That's a four stroke and gets no oil in the gas. Your 83 model is a two stroke. As far as the oil and gas mix, 32/1 is the proper mix. That's 4 ounces of two stroke oil per gallon of gas.

Remove the water trap bowl at the bottom of the petcock, (gas valve). Any water or trash in the bowl? Drain a cup of gas from the tank. Any water or trash in the cup? Dump it, clean it and re-mount it, ( not all bikes have a water trap bowl ).

Drain the carburetor. There should be a screw on the lower side of the carb float bowl. Remove the screw then replace it after the fuel drains. Turn the gas back on and wait a minute for the carb to fill with gas. Install a new stock NGK spark plug and try to start the engine. If the bike doesn't start and run properly then shut off the gas and remove the carburetor from the engine.

Remove the float bowl and clean the entire carb with a spray carb cleaner from the auto parts store. Wear protective goggles to avoid getting spray in your eyes. Spray into all the little airways and fittings in the carb. Remove the two screws on the outside throat of the carb and spray into the screw holes as well.
Be sure to put these two screws back in the same hole they came out of. IMPORTANT > do not tighten these two screws down. Only screw these in until they LIGHTLY seat. Now turn each screw one and one half turns outward. Put the rest of the carb back together, clean the air filter and install the carb. Be sure the bolts are tight. Let the float bowl fill then start the engine. Set the idle speed with the idle screw. This process should get you back on the road.

Please rate this solution. Thanks macnevind!

Apr 04, 2009 | 2004 Yamaha YZ 250 F

1 Answer


drain the fuel, locate the float bowl drain screw, lowest screw on the carb and loosen it to drain the carb. replace the fuel with proper pre-mix, replace the spark plug and it should be fine

Nov 10, 2008 | 2004 Yamaha YZ 250 F

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