88 Kawasaki 650sx running issues

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  1. #1
    PWCToday Newbie
    Join Date
    Aug 2018

    88 Kawasaki 650sx running issues

    Just purchased an 88 KAW 650sx. Got from a guy that clearly flipped it and I didnt realize that until after. I drained gas(sludge), cleaned tank and will replace fuel line. It starts hard and takes a while to warm up. One the first couple rides is was bogging out, but that seems to have gone away. BUT, now I have to choke it to start it and get right on the gas and then turn choke off for it to run. I have not rebuilt carb, but i am thinking that's the next step. Compression was 130-145 in both. The ski appears to be completely stock, including oil tank. Any thoughts are appreciated!

  2. #2
    PWCToday Newbie
    Join Date
    Jun 2010

    Re: 88 Kawasaki 650sx running issues

    You're on track with the carburetor rebuild. Would also get rid of the oil tank and pump and go premix.

  3. #3
    PWCToday.com Is My Home Away From Home john zigler's Avatar
    Join Date
    Mar 2003

    Re: 88 Kawasaki 650sx running issues

    DO a leak down test. It is an old engine, and you need to be sure your crank seals are good. Also go through the fuel system completely, rebuild carb, fuel pump, replace fuel lines, clean tank, check tank pick ups, tank valve, fuel select, etc.
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