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  1. #1
    james747's Avatar
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    Kawasaki Ultra 260x Mods?

    Hi I have a 2010 ultra 260x and wanting to do mods on it. I just rebuilt the jetpump and put a new impeller. Also done the BOV bypass and a pump wedge. I ride in light to medium chop (enough chop for the ski to get abit of air and come unhooked, but depending on conditions on some days never unhooks at all) and occasionally go further out to heavier chop (getting heaps of air)
    I'm happy with the speed but I want more bottom end as I do heaps of turns and heaps of flicks, what mods will launch me out of the whole quicker? And build better and snappier throttle response?
    Thankyou.


  2. #2
    This is what has been reported here in the past:

    1 or 2 degree wedge is good for 1 to 2 mph but may impair rough water handling.

    Custom ride plate (like Riva, R&D, Jim's) is good for 1 to 2 mph but may impair rough water handling.

    Air intake mods (like Riva kit) may add some rpms and some speed but probably less than 1mph. Plus, if you open up ski for air flow you increase risk of water intrusion or ingestion.

    Free flow exhaust likely adds less than 1 mph.

    Custom SC pulley kit may add rpms and a couple mph but will void warranty.

    The BOV block off will not add speed unless the valve was either broken or not adjusted correctly releasing boost pressure prematurely.

    Some of these Ultras come from factory with globs of silicone in and around ride plate. Remove all excess silicone and fill in the ride plate bolt holes to reduce drag.

    Clean plugs and clean intercooler can make big difference.

    Make sure engine oil level is right on target. Do not overfill.

    If you really, really want to go way faster, you either have to install turbocharger or buy 300.

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  4. #3
    james747's Avatar
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    How do these skis react with a full straight pipe? I don't care about mph gains at all, all I want is heaps of acceleration and pull through bottom end and mid range. In the future I'm planning to do cold air intake, straight pipe, and intake grate, what intake grate will be best for offshore riding? I don't need no mph gains I just want acceleration out of 180s

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  6. #4
    Take the time to smile sirbreaksalot's Avatar
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    Timing ...... air mods
    After that sell it and buy a 300

    The 250/260 ONLY like certain mods with only minimal gains
    Straight pipe is useless other than pissing people off

  7. #5
    devils ride 250's Avatar
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    You can spend 1500$ on exhaust and stage one complete and still not touch a 300. Ifi were to do it again from stock do what blue said. Clean up that silicone around the plate and while ur in there put that pump shoe seal kit in, go with the Riva straight pipe ( I like the way it sounds) and go with the r/d intake. I also like my solas prop and sponsons I put on. Other then that learn to really ride the ski especially if u ride in the ocean and no ones gonna touch u. I feel like I spent a lot to get to the 70 mark. No regrets but save ur money enjoy the ski and save for a 310

  8. #6
    james747's Avatar
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    So would straight pipe and cold air intake boost acceleration? Is changing the intake grate useless?

  9. #7
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    Useless is doing the exhaust and intake if you are one of those guys that rides in circles
    All day long pissing people off.

  10. #8
    Take the time to smile sirbreaksalot's Avatar
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    The restriction is the supercharger.......

  11. #9
    james747's Avatar
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    So pulley kit would wake the ski up more ?

  12. #10
    Take the time to smile sirbreaksalot's Avatar
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    It give some improvement .... but dramatically reduces supercharger
    life.... and at 2k each. ..well your call.
    Its not a ski to play 180's or mod for speed
    Way better others out there for that crap

    Waz

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