- Location
- Minneapolis, MN
cavitation vs. porpusing
- Thread starter balsam lake glass cutter
- Start date
balsam lake glass cutter
previously "750sxi"
- Location
- prior lake mn
i am 40 years old 5'9" 165 lbs. had a stock js 440 in 1983-1987. got out of jetskis and did more water skiing. ski buddy moved away so i thought i'd go back to the jet ski. I agree i need to learn to ride, but was looking for advise on how to make my ski ride better on calm lakes. ......yea thanks
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- Location
- Granbury, TX
Sorry dude, didn't mean to bite your head off. Honestly, it just upsets me because I see plenty of newbs on this site and PWCtoday who ask questions like yours get the same answer from so many posters: "buy more stuff/parts/mods etc."
The reason it frustrates me is because so many people get burned out really quickly because they just throw money at their ski and never get the true joy of just riding it.
Will an extended ride plate (and/or intake grate)help? Yes.
Would it hurt to buy a ride plate(and grate)? No, it's a decent handling upgrade (as well as the rideplate shimming, cheap and effective).
Tubbies (sponsons)? No, don't even consider putting them on until your riding ability is at the point where you begin to push your ski past what it is capable of and want the handling change tubbies give you. - If you hate porpoising, you will REALLY hate high speed chine-walking that tubbies create.
What I am trying to say is, spend some more time riding and playing with your stance. In time, you will be able to know what it "feels" like to hold the ski WOT (wide open throttle) in a straight level line.
My advice, put the toes of your front foot as far forward in the tray as they will go. Put your back foot where it feels comfortable (this differs between everybody). As you ride and feel the ski begin to porpoise, put 90% of your weight on the ball of your forward foot. As awkward as it feels, get your chest out over the chinpad and you will notice how the ski flattens out. This is the most exaggerated body stance to cure your problem, and in time it won't feel so scary to have your weight so far forward and you won't have to exaggerate the stance as much, you will just begin to "feel" how your weight needs to be to level the ski out.
PRACTICE PRACTICE PRACTICE
The better you can ride your ski now, the happier you will be when you add handling mods, and can really "feel" the effect they have on how the boat behaves.
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when i first started riding my sj, it did the same thing, you'll learn to make it go away after more ride time. when i first started i would have to lean way over the handle pole to make it stop, now i couldnt make it do it if i wanted to, i think throttle plays into it aswell, i blip the throttle at low speeds and just keep the nose in the air and jump forward to get on plain and then to the back for WOT. mods may help but i'd imagine it can be fixed with body position, but i dont ride a 750sx so whatdoi know?
this is why standups are cooler, there's actually a challenge to be had.
this is why standups are cooler, there's actually a challenge to be had.
balsam lake glass cutter
previously "750sxi"
- Location
- prior lake mn
I get it. learn how to ride, then slowly move into handling mods so you have a feel for the changes the mods are making. I have ordered a worx extended ride plate, but i am going to get some more hours on the tray before i install .
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kraqus
Site Supporter
- Location
- Great State of Texas
What everyone else said.....you have to ride and ride, and when you are done riding, then ride some more. Push yourself and your ski, and explore what you can do with it. And most importantly how your ski reacts when you do it. Learn, have fun and good luck!
I think purposing has to do with the weight of the rider and how the ski handles at certain speeds. I am 5'10 at 200lbs and the purposing on my SN was making it difficult to ride sometimes, but you live with it and learn the proper "throttle response to Porpoising". I sure tried EVERYTHING riding wise. Leaning forward with a -4 pole helped but did not make it go away. It was always there at a certain speed, usually 3/4 open throttle will see the beginning of it, slowly, slowly then BAM. I had to let go to 1/2 throttle to make it go away then do it all over again.
Then I went ahead and install #zero's tubbies and I SWEAR TO GOD it eliminated it completely. I am not kidding nor I am promoting someone's product. The porpoising is GONE, I can WOT all I want all day now, nonstop and the boat won't do it, period. My friend that I ride with sometimes was also surprised to see me take off and be gone way in front of him, when in the past I was always trying to keep up.
All I am saying is sometimes there are many factors involved other than experience riding, like the weight of the rider and the shape of the hull combined....But you need to go out and ride and figure it out on your own as an inexperience rider will see a lot of porpoising.
Benny
I think purposing has to do with the weight of the rider and how the ski handles at certain speeds. I am 5'10 at 200lbs and the purposing on my SN was making it difficult to ride sometimes, but you live with it and learn the proper "throttle response to Porpoising". I sure tried EVERYTHING riding wise. Leaning forward with a -4 pole helped but did not make it go away. It was always there at a certain speed, usually 3/4 open throttle will see the beginning of it, slowly, slowly then BAM. I had to let go to 1/2 throttle to make it go away then do it all over again.
Then I went ahead and install #zero's tubbies and I SWEAR TO GOD it eliminated it completely. I am not kidding nor I am promoting someone's product. The porpoising is GONE, I can WOT all I want all day now, nonstop and the boat won't do it, period. My friend that I ride with sometimes was also surprised to see me take off and be gone way in front of him, when in the past I was always trying to keep up.
All I am saying is sometimes there are many factors involved other than experience riding, like the weight of the rider and the shape of the hull combined....But you need to go out and ride and figure it out on your own as an inexperience rider will see a lot of porpoising.
Benny
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- Location
- Granbury, TX
True, but I'm 6'2" and 240lbs, I can ride a bone stock ski and not porpoise......
- Location
- Central Cali
I have also found that when you're "gettin some" in a straight line, if you slightly turn back and forth, very slightly, it helps control porpoising. Not a great fix if you're racing but helps quite a bit when just messing around. Combined with adjusting your weight, that's a free fix!!!!