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  1. #1

    '99 stx 1100 upgrades

    Hello. I am a new member here, although I have been reading post for a couple of years. I have had a 91 Sea doo sp, a 95 750 SS kaw and a 96 750 STS. My current ski is a 99 STX 1100. I was wondering what type of performance upgrades I could do. I have already switched it over to premix and installed a primer kit. I may rebuild the top end at the end of the season. Currently it has 110 lbs compression cold at 199 hours.

  2. #2
    thesepaperwings's Avatar
    Join Date
    May 2007
    South East Kansas
    Go to and read the write up on your ski. They are really the only shop that got good results without blowing those cranks. There are other options but know that the 1100 does not like to be pushed in the higher rpms.

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