Question about 1981 Yamaha XJ 650

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When I start my XJ 650 it drains a latge amount of oil out of a small hole at the bottom of the air filter box. Its been suggested that I might be overfilling with oil (my window is unclear so its hard to judge). Is there another possible problem?

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First verify the oil level......on the sides of the window are an upper and lower mark. I believe on your model the oil fill cap is very close to where the window is....remove cap and use a clean tape measure as a dipstick. Lock the tape at say 5 inches, rest the tape body on the fill hole, pull out and have the part of the tape measure body rest on the fill hole and the extended tape on the outside so you can compare the actual level dipped to the marks for min and max on the sight glass. If its high drain it down to correct level.

Posted on Apr 11, 2011


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Posted on Jan 02, 2017


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Change gear oil 1981

Drain is on the bottom of the drive shaft. Fill is on the side of the drive shaft. Fill the shaft drive assembly to the bottom of the threads of the fill hole. Takes about 200-300ml.

Aug 03, 2013 | 1982 Yamaha XJ 650

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Have oil coming out of the air box ?

Hi, Wood oil leaking from your air cleaner is caused by oil carryover from the engine. For whatever reason the breather system is not separating enough oil mist and air from the piston downstroke. There are cheap and quick easy fixes and there are more expensive ones. Start by trying the following:
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Sep 18, 2012 | 1982 Yamaha XJ 650

1 Answer

My 1982 yamaha seca 650 has too much oil pressure I just bought it and it is blowing the oil cap off the person that I bought it from drilled holes in the cap now it sprayes oil out of the holes any idea...

There should be an oil breather tube on the left side of the engine leading the airbox. Make sure it's there and cleared out. If the previous owner removed the air box and put on pod air filters, he may have plugged the breather line.

Also, check your oil level. Use the sight glass - only when the engine is off and the bike is level on the center stand. The sight glass is on the clutch cover - right side, bottom of the engine. There is a mark on the glass showing the correct level.

Jun 25, 2011 | 1982 Yamaha XJ 650

1 Answer

Just got a 1982 yamaha xj 650, where do I check the oil?

There is a sight glass on the right side below the clutch housing. Put the bike on it's maintenance stand and look at the sight glass, there is two marks that the level will fall between. Do not overfill as it will blow out the air box and clog your air filter.

Apr 16, 2011 | 1982 Yamaha XJ 650

1 Answer

Got oil pouring into air filter and then onto exhaust after about 40miles,engine not missing or louder than normal.have been getting a gray thick liquid in small amounts from time to time in the breather...

Check your oil level first, you may have too much oil in it. The grey sludge is nothing to worry about, and is usually caused by condensation forming inside the engine as it cools down, caused by short distance riding, water mixes with the oil, causing this grey thick sludge. I would suggest changing your oil and filter, but mabey before hand, flushing out the engine oil with some cheaper oil, or engine flush. Sometimes the oil going into the air filter, is a sign of to much crank case pressure, caused by worn or gummed up piston rings. Try some new oil, 10W30, and a new filter.

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2 Answers

Check the oil

There is a small glass inspection window on the lower flange of the clutch cover (r.h.s.)
Picture of part attached.

Leave bike to cool on the centre stand allowing all oil to drain to sump and inspect window for oil level. It should just cover the window when bike is level. If the window is blackened from oil stains and no oil movement is detected, drain oil, remove clutch cover and clean window from inside with solvent and replace, replace oil with 2200cc oil, Cheers.510a044.jpg

May 12, 2010 | 1980 Yamaha XJ 650

1 Answer

Where is the oil filter on a 1984 yamaha xj 650

The filter is inside a housing at the front of the engine, low down in the centre, between the centre two exhaust pipes. it is held on by one large central bolt. I think there is a locating lug at the bottom that you will need to line up when you refit the cover.

Aug 10, 2009 | 1984 Yamaha XJ 650

1 Answer

Oil level for oil&filter change

not sure of the exact amount but there is a window on the left side of the engine behind the footpeg and yes you have to lay down to see it there is a low and a full mark so with them bike on the center stand you can fill the oil to the full line it is 3.3 quarts or something like that with a new filter

Apr 26, 2009 | 1980 Yamaha XJ 650

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hi 81 yamaha i am concerned about the fuel smell coming out with the oil. could be the carbs flooding filling your crankcase with fuel? if not it sounds like you have blow by which would cause your crank case to be slightly pressured. this is caused by worn piston rings. do not plug your crank vent. if you leave your vent open install small filter to stop dirt from entering jim

Mar 21, 2009 | 1981 Yamaha XJ 650

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