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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6ya6ya
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Posted on Jan 02, 2017

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Change gear oil 1981


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Have oil coming out of the air box ?


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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

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1 Answer

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2 Answers

Check the oil


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Picture of part attached.

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Where is the oil filter on a 1984 yamaha xj 650


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Aug 10, 2009 | 1984 Yamaha XJ 650

1 Answer

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