Results 1 to 3 of 3
  1. #1

    99 stx low top end?

    Have a 99 stx 1100. Its only running 6700 rpm. Replaced a broken reed today and ran it, was at about 47 [email protected] 6700 rpm. Carbs have been cleaned and checked, new fuel lines, filter. Just seems a bit low. Any ideas? The ski accelerates ok although I need to feather the throttle just a tad on the takeoff. I have seen some stuff about a SLO and FPO modes? Does this only apply to newer skis than this?


  2. #2
    steve45's Avatar
    Join Date
    Feb 2008
    Location
    Texas
    Posts
    5,014
    +1
    285
    What do the spark plugs look like? Have you done a compression test? My '98 indicates about 53-54.

  3. #3
    thesepaperwings's Avatar
    Join Date
    May 2007
    Location
    South East Kansas
    Posts
    1,283
    +1
    1
    Sounds like the slides are sticking to me. Wouldn't worry about the mode, the 99 does ECU is not very advanced and will kill itself before it actually shuts down like it should.

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. 99 XPL 951 top end rebuild
    By JohnMstrks in forum 2-Stroke Performance
    Replies: 5
    Last Post: 09-02-2011, 12:30 PM
  2. Stock 99' 1200 PV top end rebuild kits? Where's the best place to get the parts?
    By mrtinker in forum Yamaha PWC Performance (2-stroke)
    Replies: 7
    Last Post: 07-08-2011, 05:09 PM
  3. 99 gsx limited top end and oil pump
    By pooch96xp in forum 2-Stroke Performance
    Replies: 2
    Last Post: 06-09-2008, 04:00 PM
  4. 99 polaris gennesis top end
    By bigdd in forum Polaris Open Discussion
    Replies: 5
    Last Post: 05-03-2008, 07:35 PM
  5. 99 polaris gennesis top end
    By bigdd in forum Polaris Open Discussion
    Replies: 1
    Last Post: 04-23-2008, 08:51 PM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •