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  1. #1
    PWCToday Regular
    Join Date
    Jul 2014
    Location
    calhoun, ga
    Posts
    119

    89 650sx running issue (bone stock)

    Last week i went out, and ski was running fine at full throttle. done a tail stand, and had a few get offs but the ski always landed right side up. The longer the day went the slower and less power i had even at full throttle.
    barley made it back to the put in. At one point it seemed to be skipping and i went ashore raised the hood and had just a little bit of water in the Separator. I dumped it out and it didn't skip anymore to the truck. Still had low power.

    Things i have checked sinceback home.
    compression in both cylinders 185 only about 10 hours or less on new top end.
    pulled the carb and pulled out both jets and them seemed clean.
    checked all fuel lines for cracks
    New gas non eth
    i have hooked it up to the hose and hit it full throttle. it seems to skip really bad when at full, but at half throttle there is no skip. Also seems to idle just a bit rougher than it did before. You can almost see the fuel going in like spurts instead of a steady stream. Not sure if this is just the motor hitting the rev limiter or not causing this.

    any ideas?

  2. #2
    PWCToday.com Is My Home Away From Home Rushford_Ripper's Avatar
    Join Date
    Dec 2009
    Location
    Buffalo
    Age
    31
    Posts
    5,797

    Re: 89 650sx running issue (bone stock)

    Try new spark plugs?


  3. #3
    PWCToday Regular
    Join Date
    Jul 2014
    Location
    calhoun, ga
    Posts
    119

    Re: 89 650sx running issue (bone stock)

    Quote Originally Posted by Rushford_Ripper View Post
    Try new spark plugs?
    brand new ones applied

  4. #4
    Resident Guru
    Join Date
    Jun 2010
    Location
    Newaygo, MI
    Age
    24
    Posts
    869

    Re: 89 650sx running issue (bone stock)

    Any exhaust leaks? Maybe time for a carb rebuild?
    85 JS550- New build comimg soon

    Big thanks to Chris Newmiller and Newmiller machine for the excellent work! I highly reccomend Newmiller machine!

  5. #5
    PWCToday Regular
    Join Date
    Jul 2014
    Location
    calhoun, ga
    Posts
    119

    Re: 89 650sx running issue (bone stock)

    Quote Originally Posted by hendo14 View Post
    Any exhaust leaks? Maybe time for a carb rebuild?
    no exhaust leaks that i can see. maybe so on carb rebuild.

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