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  1. #1

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    01 Yamaha Xlt 1200 having Problems

    So I am a newbie to this forum. I have an 01 xlt 1200 about 140hrs on it. Motor Was rebuilt at 80hrs.. I had the carbs redone about 2 years ago. The ski has been running completely like dog Sh*t it will hit top speed then bog down and wont reach up to top speed again, feels like it is running on 2 cylinders it will only rev up to 5k. I don't feel like dumping any more money into this thing. It has new spark plugs/ Fuel Filter the wires are only 2 years old. Anyone know what this problem can be?


  2. #2
    Just relax and enjoy the ride. XLT Chad's Avatar
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    Start with checking your compression. Then check to make sure that your power valves are opening and closing.

  3. #3

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    How do I check Compression? Like I said I am a Newb when it comes to this stuff.

  4. #4
    Just relax and enjoy the ride. XLT Chad's Avatar
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    You'll need a compression gauge. Harbor freight has them or NAPA. hook it up and turn the motor over with the other plugs still in. then repeat for the other two. Also listen if your servo valve for your power valves is operating. You'll see the cam next to your exhaust manifold open and close.

  5. #5
    slothman's Avatar
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    cylinders should have at least 110psi in each. Do the test on a warm engine. Leave all of the plugs out. Hold the throttle wide open. Each cylinder should be +/- 5% within eachother. good luck.

  6. #6
    icky002's Avatar
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    if compression is OK, a good possibility is a failed catalytic converter if you have not taken it out yet.

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