Question about 1985 Yamaha XJ 700 X Maxim

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I need to know where all the hook ups go coming from the shut off valve of the gas tank on my 1985 yamaha maxim x 700

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  • mike(ozzy) parker
    mike(ozzy) parker May 11, 2010

    how many hook ups //usualy one vacum one fuel line /vacum opens fuel switch//possible one goes to reserve//im partial to honda//oz

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There are two lines coming out of the fuel petcock (shut-off valve). The small diameter one is a vacum line that connects to the top of the rubber intake located between the carb and the engine head. you should notice that all four intakes have a vacum port in this location and they should all be capped excet one - usually #2.

The second line of the fuel petcock is the larger diameter one, and is the fuel line. Make sure you install an in-line filter if it has been lost. The fuel line connects to the carb on a pipe that feeds all four carbs. The pipe is located on the lower portion of the carb, down by the float bowls. There will be a connection port between #2 and #3 (right in the middle of the carb assembly). It will be difficult to see when everything is assembled and even more dificult to reach.

Posted on Aug 20, 2009

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Hi, Anonymous always check fuel flow first to isolate the problem area otherwise the usual suspects are:
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