Question about 2003 kawasaki VN 1500 Vulcan Classic Tourer - Fi

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2003 1500 Vulcan classic fowling Rear Plugs

Good Evening
I have a 2003 1500 Vulcan Classic that has less than 13,000 miles and it is fowling the two rear plugs that they have to be changed every 100 miles. Has anyone every had this kind of a problem. I guess is I would like to know how much trouble is it to remove the engine so I can have a top end done. It looks like the entire frame has to come apart because there is no room to unbolt it and raise it up because it hits the frame. Any help I could get would be greatly appreciated
Thanks
Russ

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  • Gee Man Mar 03, 2009



    FTjoe & DickCanFixIt

    When the plugs foul, are they black in color or oily? Yes Very oily

    Did this start all of the sudden? Yes



    What has changed? synthetic oil instead of dino oil or vice-versa

    Nothing Changed same everything
    have you tried to go up one heat range on the spark plug to see if it makes a difference? Yes ( No Difference )


    I have even changed out the coil & wires



    Perform a leakdown or compression test on the bike before you go to the expense of a top end rebuild. You may find it is something as simple as the rear cylinder not firing properly or perhaps fuel mixture to that cylinder is not correct.
    What should the compression be on both cylinders?


    Will the rear cylinder have less than the front?

    Could you explain to me how to proper way to do a leak down test

    I can borrow the gage from my buddy

    Thanks

    Russ

  • Gee Man Mar 08, 2009

    Thanks to all I don't seem to be getting anywhere here at all I really wanted to know how to do a leak down test with a real gage not squirt some oil in the cylinder

    Everyone have a great day

    Russ

  • joe May 11, 2010

    when the plugs foul, are they black in color or oily?

    did this start all of the sudden? if so, what has changed? synthetic oil instead of dino oil or vice-versa?

    have you tried to go up one heat range on the spark plug to see if it makes a difference? how about a different brand of spark plug? i never had much luck with NGK plugs.

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Perform a leakdown or compression test on the bike before you go to the expense of a top end rebuild. You may find it is something as simple as the rear cylinder not firing properly or perhaps fuel mixture to that cylinder is not correct.

Post a picture of the plugs that are fouling. Are the ignition wires crossed back there? Both plugs may not fire at the same instant, some dual plug setups fire slightly apart (although I can't think of a way that would cause severe fouling like you describe.)

Posted on Feb 28, 2009

  • Dick
    Dick Mar 08, 2009

    You can see how to test your compression here.

  • Dick
    Dick Mar 08, 2009

    The leakdown test is simply a compression test over a period of time. You squirt oil in the cylinders to check if your rings are worn, it leaks much less with the oil added if they are. Install your gauge, turn the engine over a few times, stop when the pressure is highest and note the pressure. Leave it for a few hours and look at the gauge again. If it has dropped much you have worn engine parts and probably need to rebuild it.

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