Question about 2001 Yamaha V-Max

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`89 vmax starts & then after a minute begins blowing smoke & oil

Bike has only 13000mi,less than500 since a 4 into 1 kerker w/jet kit was installed by yamaha dealer

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Hi, Dwtlvn your instrument gauges and lights can alert you to most electrical and engine issues they can not warn you about failed engine gaskets or seals so your engine has to resort to old fashion alert methods of colored "SMOKE SIGNALS" here is a breakdown of their meaning:
1. COLORLESS OR SLIGHTLY BLUE SMOKE on start-up means your air/fuel mixture is at the right composition and everything is well burnt in your combustion chamber.
2. BLUE SMOKE on start-up is usually caused by failed valve seals dripping oil into the combustion chamber when the engine is not running.
3. YELLOW OR BROWNISH SMOKE at start-up means your air/fuel mixture is too lean. Too lean means that there is low fuel but high air mixture in your combustion chamber.
4. WHITE SMOKE on start-up may be caused by a blown head gasket allowing coolant to enter the combustion chamber and may start dripping out of the exhaust pipes or mufflers. Smoke while riding is usually caused by worn out or damaged valves, seals, guides, pistons, rings, or cylinder walls.
5. BLACK SMOKE on start-up is usually caused by too much fuel in the combustion chamber this can be due to air/fuel mixture adjustment too rich, accelerator pump improperly adjusted, faulty choke/enrichner or not in the off position, air filter dirty and clogged, faulty carburetor float needle and seat, pilot jet too large, fuel injectors leaking, smoke while riding is usually caused by the main jet being too large or a damaged carburetor.
It should be noted that aggressive or abnormal throttle operation will cause these conditions to manifest themselves exponentially.
For more information about your issue and valuable "FREE" downloads that you will need please click on the blue links below. Good luck and have a wonderful day.
Thread Blowing Smoke at Idle
Burning oil
Yamaha VMX12H Supplementary Service Manual
OEM parts for Yamaha
YAMAHA VMX12 Owner Manual

Posted on Jun 12, 2017


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Sounds like regulator/rectifier, stator, or charging rotor.

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SOURCE: 2001 yamaha yzf-r6 with a running problem

Pull the slides from the throat of the carbs, Move the clip on the jet needles one notch lower, two notches at the most. Simple and didn't cost $400.

Posted on May 06, 2009

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SOURCE: 750 89' Yamaha Virago gas & oil coming out of air cleaner

sounds like the floats are stuck. cleaning carbs should do the trick. its a good practice to start up motorcycles and let them warm up from time to time while being stored.

Posted on May 07, 2009

SOURCE: Carb (Mikuni) flooding on Yamaha Vmax motor cycle

You will have to adjust the float pin of tht particular carb and don't remove them off the rack..just pull them out of the engine and work on the one tht needs attention.
Hope this helps!

Posted on Sep 06, 2009

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SOURCE: 94 yamaha vmax 600. How do you tighten the track??

you mean v max 1200? Losen rear wheel, align with a straight bar. Make sure the drive shaft spin freely

Posted on Oct 13, 2009

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Blue smoke from exaust then after twentyfive minutes the push mower begins to sputter and blow alot more smoke.Its a yard machine 4 hp 22" cut.What is it and can it be fixed cheap.Or should i just buy...

Blue smoke would indicate its burning oil. Oil is bypassing the piston rings or valves and is entering the combustion chamber where it is then burnt off.
Small engines are easily rebuilt, usually less than $100, most people just run it until it drops or buy a new mower.

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I have A 1988 Virago 1100 With Cobra Mufflers and The Carbs Are Jetted with A cobra I stage Kit And The Fuel Air Mix Screws are new It Cranks And Runs But Black Smoke Is Comming out of the Pipes Whats

Sounds like you need to take it to a shop that kinda knows what they are doing. If they have problems they can call cobra themselves. As a shop the aftermarket companies are usually pretty good about helping out since most of their product is sold or installed in aftermarket shops. With that being said. I would start by dropping the clips up one notch and see how that works. By sliding it up one notch it should run a little leaner . If it's better but doesn't cure the problem then go up one more. If it does clear up the black smoke then there you go. Generally cobra will tell you in the directions what common jets to install. They even have a section for higher elevations as well. If not in the directions they usually do on their website. Hope this helps a little.

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Hi, What Fuel/oil ratio are using?

I'd strongly suggest 40:1 with fully synthetic 2T oil and premium fuel.

How is the bike's compression? It should be165-215PSI. If it is less than this install new correct size piston and rings and use new gaskets.

If the bike is still splutter and blowing lots of smoke then raise the main jet needle by one notch.

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Gio 250cc dirt bike,blows blue smoke when started then still blows even more when riding

Oil ring snapped or seized. At least it won't seize up as there's plenty of oil there!

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My trimmer will start but it then smokes and will shut off after a minute or so like it is overheating? I can't restart it for a while. Any suggestions?

Sounds like your mixing too much oil with the gas and that is causing your smoking problem.
As for it not running very long I suggest you follow the directions below.

Check your fuel filter in the fuel tank, if you have one.
It may need replacement or cleaning.
Also check your fuel tank for debris/trash and clean it out if necessary.
If the mower/weedeater is over a year old, then I recommend that you buy
and install a new carburetor repair kit,because the diaphragm will get hard
and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor
internal rubber parts like the diaphgram and O rings.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small
rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid
and letting it run a few times like that and it will flush the gunk out of
the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to
reassemble the carburetor or follow the instructions you get with the
carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need
to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes
to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first
and then turn them back out to their orginal position before you started.
This is a FREE answer,Please rate me

Oct 11, 2010 | Ryobi Garden

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Kohler CH20S losing power, blowing black smoke and oil

Sounds like engine is flodding. Have carb float checked, make sure it is at the correct height

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2008 ninja 250 engine oil looks green color

Just replace the oil, its cheap enough to do and costs less than rebuilding the engine.
the white foam on the oil cap is normal its just fine water particals built up, change the oil and take the bike on a run.
so does the bike run fine with the jet kit and exhaust change ? you dont explain your self well.

Jun 21, 2009 | 2008 kawasaki Ninja 250R

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Large knock at start up.

All anyone is doing at this point is guessing on the jet size. With all the work you've had done I would go ahead and pay for a dyno tune up.

Apr 06, 2009 | 2004 Harley Davidson XL 883 Sportster

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Smoke alot

sounds like the bike is in need of new piston rings especially if that much oil is blowing on such a newer bike. if the crankcase is not overfilled, then focus on rings especially if the sparkplug is oily too.

Feb 03, 2009 | 2004 Suzuki RM 125

1 Answer

My 1989 vmax has poor compression on the rear 2 cylinders.

You can rule out poor piston rings by doing another compression test, this time with a teaspoon or two of oil in the cylinder. Oil will help seal a piston ring (raising compression temporarily), but will have no effect on valves. I would suggest burnt valves rather than bent. That might explain why only the back two cylinders, they run a little hotter. Under normal circumstances (stock exhaust, sane driving) not hot enough to make a difference but if your previous owner was a clown who knows?

Good luck Nik, those bikes are a lot of fun and pretty reliable when done right.

Jan 15, 2009 | 2002 Yamaha V-Max

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