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  1. #1

    Join Date
    May 2019

    2006 GTX Chine walking

    Good day, all. I've perused these forums for quite some time and figured it was about time to post as the knowledge base here is a marvel.

    I recently sold my old 1996 GTX, which ran/performed flawlessly and upgraded to a very clean 2006 GTX w/the 4tec 155. Beautiful machine. I've read many topics on this and other forums in relation to an odd handling phenomenon known as a chine walk. This waverunner has this affliction. It annoys me to no end as my '96 was rock solid...NEVER rocked side-to-side. This rocking side-to-side happens most regularly from around 22-23 to 27-28 mph, according to the speedometer. It happens during both acceleration and deceleration at these speeds. It then seems to level out and be reasonable until I notice that it will fall from one side to the other. While going straight, when I turn slightly right, the ski will fall to the right, then the same with the left side. It's not the traditional smooth left or right motion you'd expect. I always get the mental picture I'm riding on a center spline that's taking me slightly out of the water and it just falls onto one side or the other. It's a very unfamiliar feeling that I've never experienced on any waverunner before. If I have a passenger, the handling becomes un-nerving, erratic and unpredictable. I find in certain conditions, my steering seems mis-aligned, though it generally seems straight. It is my belief that something is wrong somewhere. I can't accept that this is normal and have no doubt this machine hasn't always acted this way.

    The first thing I looked at as a possible fix to this problem was to remove/block the OPAS system. The more I read about it, the more I didn't want it on the machine...not to mention, I thought it was creating the erratic handling problem. Removing the OPAS helped considerably to eliminate some of this erratic handling and earned me several MPH. Surprisingly, the 3 times I was out prior to the OPAS removal, I couldn't break 50. Once removed, I hit 56. Must've really been dragging. But even still, that nagging rocking side-to-side in the 20 mph range and un-nerving, unpredictable motions at high speed still persist...just not as bad.

    So, I'm looking at swapping the sponsons now. I would go with the Riva ones but really don't want to drop $340 unless I'm quite certain that would fix the problem. I've read a bit about changing the intake grate but always come up confused how the stock grate would generate this problem...and would changing that help? I guess I'm most interested in hearing from folks who have actually experienced this hugely annoying problem and what their solution ultimately was. There is no way a waverunner should behave this way. I just wanted some insight before I pull the trigger on the sponsons. Huge thanks, all!


  2. #2
    I've never noticed anything like this on my 2008 GTX 215, so I don't think its inherent in the design of the ski (?)

  3. #3
    RiverRat71's Avatar
    Join Date
    Apr 2016
    Flint River, GA
    If it is still a problem w/o OPAS, which would have been my first guess, I would say you have something really loose with the steering. RR

  4. #4
    gone fishing sucks2bu's Avatar
    Join Date
    Sep 2013
    miami fl.
    I've had several GTX's and RXT's with and without opas and never had one do that... I've had several Yamaha gp1200/1300r that did that all day long. But I digress. Maybe look at you intake grate for damage or your ride plate. Besides those things unless someone epoxied on a gp1200r bottom hull on your seadoo it shouldn't do it.

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