SX/SXi/SXi Pro Porposing issues

spork

spork

down with the sickness
Location
Indianapolis Indiana
Just went -4 on my ac pole for my 750sx and it reduced my back fatigue by quite a bit. Definitely suggest shortening especially if you're bigger/taller.
 
spork

spork

down with the sickness
Location
Indianapolis Indiana
zaptoad

zaptoad

just a guy
Location
North Idaho
I have 2 96 SXI's. 6'3" 200#. Both have Werks ride plates, which helped a lot. One has a stock pole, the other a -2" pole. The shorter pole helps a lot because I can transfer my weight farther forward easier. Don't know about tubies, never tried them. A $200 extended ride plate will help you alot with the porpoising, way cheaper than a shorter pole or tubies.
 
el_pato

el_pato

Location
norcal
sxipro02 said:
The biggest fix is riding time, I put a longer plate on mine and even hull extensions but now that I'm a better rider with more seat time I keep shortening the back up and raise the nose.
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hey I'm doing the same as you, every day shorter and shorter the back to do same air, also I have the ocean pro plate for racing.
everything is in riding, riding, riding.......
 
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sxipro02

sxipro02

Location
Arnold MO.
GreekONaSKI said:
Would the wrong prop make the ski porpose?
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Yes, kinda. If your prop is damaged or not pitched correctly for your setup it will cavitate and cause issues. Also a good intake grate makes a world of difference. I just switched out my solas intake to a R&D and it helped drastically. Gotta keep that pump loaded to keep the nose down.
 
K-Man

K-Man

No smoke like Two Stroke!
Location
Queensland
When I first started riding my 750, I found that it porpoised crazy as, even with the WORX plate. After riding much more in salt water (started riding standups on a lake), I got way better. Most of the problem is in the riders position in the tray. When I'm just cruising around (1/4 to 2/4 throttle) my right foot is about 3/4 up the tray, and my left is close to the edge of the back of the tray. There is almost no porpoise now. It also seems to me that speed plays a large factor in porpoising aswell. You want to stay above 1/4 throttle, with the aforementioned foot positioning and you should be right.

If you are going crazy fast (3/4 and WOT), one foot needs to be half way up the tray, and the other half of the back of the the tray, crouching heaps. Like this:
LtUv6pu.jpg
You can't really see my foot position, but you can see how low you should be crouching at high speeds.

If I ever get around to it, I have the article in a copy of SPLASH where they interview The Slasher, and he talks about turning and body positioning in races, and I'll scan and upload.

Best of luck! :brap:
 
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Sxirider44

Sxirider44

Location
Corona, California
idk if anyone mentioned it yet but the sxi pros have pump wedges from the factory to keep the nose down if someones been tinkering around with the ski or changed that out it could account for porposing issues. just throwing it out there i didnt even know these had one till i took a wedge off of my 650 to put it on my 750.i put both on but one upside down so basically its a zero degree wedge together. but my ski porposes with really light people or taller heavier set people .could be the riders too buy hey whatever works for me i'm fine.even with my tubbies at top speed my ski still rocks a little bit
 
ironman2011

ironman2011

Location
kentucky
Just my 2cents worth here for what it's worth. 92 model 750sx with pump wedge nozzle down of course, and other than a little WFO throttle chine, it does not porposs. Other than practice, practice, practice, it's a good investment.
 
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