Question about 1980 Yamaha XJ 650

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Why is my exhaust filling with gas and oil - 1980 Yamaha XJ 650

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Hi, Mike229w for this situation I would call my local dealer or reputable shop's service/parts department and inquire about any possible quick fix, answers, or parts inquiry. If necessary, transport your bike to the dealer or shop and have a professional technician take it for a test drive, if it is in running condition, and give you a written estimate of repairs and answer any specific questions you may have about your problem. 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.
1981 Yamaha XJ650 Maxim Fuel Problem
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Posted on Jun 27, 2016


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SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

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Posted on Jan 02, 2017

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SOURCE: Why is the gas getting

yes sir i,m afarid to tell you that you are looking at a top end rebuild inc. rings pistons gaskets


Posted on Mar 25, 2011

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1 Answer

Why would oil come out exhaust pipe?

Either you may have over filled the oil or possibly you having problems with the exhaust gas blow by. A build up of fluid can cause the inlet system to pressurise and this forces oil vapor in to the inlet system and out through the exhaust.

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Excess white smoke coming from exhaust of TB 75SS string trimmer

This model is a four cycle engine meaning that it does not a mix of gas and 2 cycle oil. You just fill it like your lawn mower, gas and fill the crank case with oil

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Blue smoke coming from exhaust

Blue smoke coming out of the exhaust indicates that oil is getting into the piston cylinder and being burned along with the gas. This could be a leaking head gasket, worn piston rings, or the wrong weight engine oil (viscosity too low). A leak down test will be needed to diagnose.
Have you checked your engine oil level?

Apr 01, 2014 | BMW Cars & Trucks

1 Answer

Ktm exc 250 2001 model starts then bogs out exspansion chamber full of oil and when i say full it was running out of it

More than likely it's not oil running out of the exhaust. It's excess gas cleaning out the carbon in the exhaust which looks like fresh oil running out. I would check your float in the carb. It's probably running over and filling the cylinder with more gas than it needs.

Dec 01, 2013 | Motorcycles

1 Answer

Why is the gas getting into my oil and filling up the exhaust pipes with gas and this a head gasket problem

yes sir i,m afarid to tell you that you are looking at a top end rebuild inc. rings pistons gaskets


Mar 25, 2011 | 1980 Yamaha XJ 650

1 Answer

. Would too much oil make the bike Deceleration

Only if the air filter has become oil fouled . More than likely this would keep the bike from running too. If you have too much oil be sure to do the sniff test (on the oil fill hole) just in case a carburetor float stuck and filled the engine with gas. This might also cause poor running. If you have oil in your gas be sure to change the oil , check the air filter, and always turn off the gas when you are not riding. If everything is normal , then you probably need to change the exhaust o-rings in the head and the exhaust seal from the head pipe to muffler. By sealing the exhaust system you should eliminate the popping and backfiring from deceleration.

Nov 08, 2010 | 1992 Honda CB 1

1 Answer

Gas is spitting out of the exhaust

Check your oil. If it is too full , change it. Occasionally the Honda's of that time would have the float stick and fill the engine with gas. There may actually be nothing wrong with your cycle , new bikes did this. If gas filled the cylinder and went into the exhaust you probably have a stuck float. If the problem happens again you may have to disassemble and clean the carburetors , replacing the float needles at that time. One good way to keep your oil from filling with gas is to always turn off your gas at the fuel petcock after riding. Be sure to check your air filter for gas/oil saturation and be sure to pull the plugs on your pollution tubes under the air box to drain the blow by.

Oct 23, 2010 | 1984 Honda VT 500 C

1 Answer


Are you sure it's not gas mixed with oil? Sounds like the carbs are overflowing and filling the crankcase with a gas/oil mix. The rubber hose at the head should be for exhaust blow-by fume recirculation.

Jul 02, 2009 | 1998 kawasaki VN 800 Vulcan Classic

3 Answers

Gas entered the exhaust system and then oil reservoir. I got the gas out exhaust change oil. Mower runs but in question is gas still entering both places.

the little solenoid on the bottom of your carb is letting gas flow while it is not runnung.therfore gas gets into your oil.About an 80.00 part..or you could just turn your gas valve off when your done mowing.but still you would have to eventually replace that part.hope this helps

May 27, 2009 | Briggs & Stratton Garden

1 Answer

Black oil out of ehaust

It is black just due to the carbon from the exhaust and it has been building up from day one. Don't worry about it other than being sure you run premium gas at 32to 1 mix. = 4oz two stroke engine oil per gallon of gas. NEVER use motor oil in the gas.

May 01, 2009 | 2003 Husqvarna CR 125

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