Question about 1991 Yamaha XJ 600

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The bike is burning oil in the cylinder possibly need photos on how the pipes are connected to the carbs.power

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Hi, Powerskater9 the answer to this question is way above my pay grade for this situation, I would call or visit my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry.
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.
Yamaha XJ600S 1992 Service Manual
OEM parts for Yamaha
Yamaha XJ600SF Owner Manual
Yamaha XJ 600 1991
Yamaha XJ600 Wikipedia

Posted on May 19, 2017


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Posted on Jan 02, 2017

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SOURCE: Just taken carb off of a Yamaha sr125


Offhand, I would suspect the clear tube to be overflow while the black (smaller and connected at the bottom of the bowl near a bleeder screw) would be drain hose for removing stale or contaminated fuel inside the carb's bowl. As long as their is no suction on any of the tubes with the engine running, you should be OK. Should there be suction felt at the free end, then it should be connected somewhere and most likely would be to the fuel valve/petcock or must be plugged.

Just a start, do postback how things turned up or should you need additional information. Good luck and Thank you for using FixYa.

Posted on Nov 17, 2008

  • 80 Answers

SOURCE: my royal star 1996 is burning oil on # 3 cyclinder

What is the compression on the cylinder compared to the other cylinders? It should be within 10%. Some causes can be - as you suggested - the valve stem seals. Also, the sleeve could be rusted, as the valves could have been open on that cylinder. Generally speaking, on a 4-cylinder motor 1 cylinder has both its valves closed, 1 has both open, 1 has an inlet valve open and one has an exhaust valve open at any given time. Another possibility is that the valve could be sticky - try Wynn's Valve Ease or a similar product.

Posted on Jun 18, 2009

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When my bike is running I get white smoke from the right side exhaust and the right side also blows harder than the left. What could this be?

IF you are running stock pipes (not "True Duals"), the right pipe exhaust ALL from the front cylinder, and SOME of the rear, and the left pipe only blows SOME of the rear alone.

The stock rear pipe splits, some going to the left pipe by itself, and the rest going to the right pipe WITH the exhaust from the front cylinder.

Now, white smoke usually indicates moisture.
Being a (non-VRod) Harley, that eliminates the liquid coolant, because there is none.

Next up that comes to mind is condensation.
BUT, this would burn off fairly quickly.

So is the white smoke only at first, or even when warmed up?
And if warmed up, is it actually coming OUT of the pipes, or OFF the pipes (like some oil burning)?

May 19, 2014 | 2000 Harley Davidson FLHT Electra Glide...

1 Answer

'07 V-Star leaking oil at the rear cylinder exhaust pipe seam

i just average joe, but i vote broken ring...sorry pal.. i recently repaired a bike...same thing was my case, the thing just had too much oil in it , so much so that it was backing into carb...jus a thought

Dec 03, 2013 | 2007 Yamaha V Star 1100 Custom

1 Answer

2002 Suzuki Marauder VZ800 Front cylinder does not fire till bike warms up a bit?

Definately try a spark plug first. What does the old spark plug look like? ( white, oil fouled, melted, metallic?). Usually a fuel issue will make the inoperable cylinder very hot. Might have a loose valve guide in the head, or a bent valve.

Oct 18, 2012 | 2004 Suzuki VZ 800 Marauder

1 Answer

My bike is bogging down, drowning plugg in fuel, white smoke & strong smell of fuil from rear cylinder, what could be the problem?

Sounds like the float is sticking in the carb on the rear cylinder,washing the cylinder with fuel,and possibly going into the crankcase oil. The carbs will need to be removed,cleaned,set-up,and synchronized.Be sure to change your oil as well. The gas has most likely mixed with the engine oil,and will cause you to spin a bearing or worse.
Good Luck!

Oct 04, 2012 | 1993 Suzuki VS 800 Intruder

2 Answers

No power and burning oil

Did you replace the plugs? (Cables)
Maybe that is the problem with the power.

May 24, 2012 | Honda Motorcycles

1 Answer

Cant locate oil pump on 06 speedfight puegeot 50 cc

The pump is a tiny electric one on the 2006 Speedfight. You'll find it underneath the bike, on the left hand side, in front of the engine. It's very small, it has a 2 pin electrical connection on top and the intake and outlet oil pipes.
If you can't find it, just follow the clear plastic oil pipe from the carb inlet.

I know this as I have one in the shop at the moment, oil pump is not getting it's 12v to power it.

Nov 26, 2011 | Motorcycles

1 Answer

New exhuast plugs wires jetted carb stilll getting smoke from one pipe ,from front jug ,but bike runs excellent. any ideas

What color is the smoke? If the smoke is white, it's oil smoke. If it's fuel, it'll be black smoke.

Generally, black smoke from the exhast indicates a too rich mixture for one reason or the other. You said you rejetted the carb. This could be part of the problem. You also said that it's only out of the front pipe. If you rejet the carb, it effects both cylinders. If you have a vacuum leak on the rear cylinder, this could cause the front cylinder to run rich.

If the smoke coming from the front cylinder is white smoke, you may have a oil problem. It could be rings, a valve stem seal, or a head gasket leak. But, unless the smoke is heavy and the bike runs good, I wouldn't worry about it. If it bothers you, have a leakdown test run on the engine. That should tell you where the problem is. Or, just do a top end overhaul on the engine and be done with it. Have a new set of rings installed or have it bored and new pistons if needed. Also have a valve job done on the heads. This should solve the problem as you'll have to replace the intake gaskets when you take the intake and heads off.

Don't just keep throwing money at the problem. That gets expensive and is only successful part of the time. Anytime you have a problem with one cylinder only, whatever is wrong is confined to that cylinder. Anything that you do that effects both cylinders is usually useless. I would suspect a valve stem seal on your bike. You didn't say how many miles you have on the engine nor what type of carb you're running.

Good Luck

Jun 20, 2010 | 2000 Harley Davidson FLHR-FLHRI Road king

3 Answers

Exssive oil from tail pipe yz 125

Hi, when you change your pipe to the FMF you reduced the back pressure and gave it more flow. That causes it to run a little "rich". Look at your spark plug and check the color of it, it should be a nice tan color. If its a dark brown then you need to "lean" out your bike. The easiest way to do that is by taking the slide out of the carb and taking out the main jet, the lock washer is set to the middle position for a stock set-up. Move it down 2 notches and then run it and see what your plug looks like. The black "goo" is the unburned oil from not running lean enough. Another trick to try is run a NGK-EV plug. it burns hotter so it will help with the oil problem (and make it a little more snappy also). And as an added bonus it will be easier to start.

Aug 21, 2009 | 2003 Yamaha YZ 250

1 Answer


theres a few things that can be happening here...Im not sure if its spitting out fuel, oil, or coolant, so ill give u a quick explanation of all 3 possibilities. first, there may be a blown crank seal. this ils the most likely of problems. im assuming that your engine still runs ok. but you have an excessive amount of blue-ish smoke and some oil coming out of the exhaust. this would require a very good technician to fix. the crankcases must be seperated to properly install a new seal.
second, you may have the same symptoms as stated above. but instead of the crank seal being bad, it may be the crankcases leaking oil. you see, theres no gasket between the crankcases. there is only a thin layer of a silicone-type gasket maker that yamaha uses to seal the cases. sometimes that thin gasket fails, and oil is allowed to leak into the crankcase, then is passed through the cylinder and exhaust. if you determine that it is oil burning, (youll know because of the very high amount of smoke compared to the left cylinder), split the cases and replace the crankseal, even if you think it may just be the gasket. they only cost about 8 dollars, and tahts cheap insurance.
third, it may be your head gasket leaking. unlikely, but a possibility. even though it would leak coolant into the exhaust, it can sometimes be mistaken for oil after it mixes with all of the carbon built up inside the pipes. youll know if its a bad head gasket if the bike is hard to start, and the coolant level in the radiator goes down after a short time riding. also you should notice that your engine bogs or sputters intermittently, but frequently.
finally, the last possibility is that your carburetor(s) arent adjusted properly. once you rule out the possibilities I listed above, then check make sure that your carbs arent overflowing. if they leak, then your getting too much fuel to your cylinders. if theres no leak on the carbs, then your jetting is just a little bit too rich. reducing the main jet by 1 or 2 sizes should help this problem. a good indicator of a rich condition is having to frequently change the spark plugs just for the bike to run properly.
hope this helps you out at least a little. if you have any questions or want anything clarified, feel more then free to contact me.

Jul 28, 2009 | 1986 Yamaha RD 350

1 Answer

My royal star 1996 is burning oil on # 3 cyclinder

What is the compression on the cylinder compared to the other cylinders? It should be within 10%. Some causes can be - as you suggested - the valve stem seals. Also, the sleeve could be rusted, as the valves could have been open on that cylinder. Generally speaking, on a 4-cylinder motor 1 cylinder has both its valves closed, 1 has both open, 1 has an inlet valve open and one has an exhaust valve open at any given time. Another possibility is that the valve could be sticky - try Wynn's Valve Ease or a similar product.

Jun 17, 2009 | 1996 Yamaha Royal Star XVZ 1300 A

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