Question about 1981 Yamaha XJ 650

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I have a 1982 yamaha 650 seca turbo. I just bought it and was gone for two week on vacation. pon returning, my motocycle leaked gas from the exhaust pipes. So I cleaned my carb. Boiled it in lemon juice. Put bike back together, and bike started. Runs great, but gas is pouring our the boot of my driveshift. why or how can this be? It only happens when my bike is running.

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When the carburetors over flow enough to fill the exhaust, It is possible that the gas also went into the cylinder and flowed past the rings and into the crankcase. With the engine overly full of gas and oil you could easily pop a seal or blow out a gasket. Check your oil level. If it is too full , change the oil, it will not lubricate properly with all the gas in it. Check that your shaft seal has not popped out. Check the air filter, the breather may have blown oil and gas all over it when you started the bike. Empty your pollution tubes behind the motor( they will drain the air box). Get in the habit of turning your fuel petcock off when not riding. This gas flooding happens randomly in certain models but can happen to any one.

Posted on Sep 08, 2010

  • David Belcher
    David Belcher May 14, 2011

    On the turbo model it was not uncommon to add 4 to 6 extra fuel filters around the fuel system to keep rust from plugging up the works.

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