Yamasaki 701SX

550headache

tobacco grower
Location
tobacco valley
Sweet! I used a stock 650SX pipe with a factory pipe manifold works and fits well.

Make sure you give us a update as soon as you ride!


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There was this whole thing about putting a chip in the Ford 7.3 PSD engine. But it seemed to me from reading the threads at Ford-Trucks.com that it could create a non-linear throttle response. And I drive on ice allot, so I was afraid of a kind of turbo effect kicking in and breaking the tires loose, so I never installed a chip.

I have been similarly afraid of adding a pipe to a jet ski engine. So, this statement makes me want to inquire about what you mean @kevbo and @SexPanther:

"The older I get the less I like riding with a good pipe."
Sorry it took me 100 years to respond to this.

My thoughts are this.. Take them with a grain of salt as I am a much better pilot than tuner.

I have ridden 701 powered Superjet’s with only a pipe that will rip your arms off and blow your mind. Solid reliable power where you need it. I have also ridden 701 SJs with enhancer, head, and pipe that are absolutely slow and the owner just doesn’t have any experience to contrast it with.

I personally came from the 550 sx platform and had all kinds of sweet parts that maybe didn’t work so well together. I rode screwy sherbet’s 550’s and realized I did not have it figured out. Specifically a Shan Dobson built sx that I swear is faster than most 800 SXR’s.

Tuning is so important. My 2017 SJ just ran really well out of the box. To me, the way I like to surf waves, your ski idling really well and coming off that bottom end is really imperative. Stock trim is totally consistent anreliable. And I don’t really love getting destroyed by Mid Winter Surf in Grayland so that was ideal, and a great contrast to the 440 powered 550sx I came from.
 
As for the first ride. It was extremely brief due to some pump alignment concerns combined with having not used adhesive to secure the pump shoe yet. No ride plate, no scoop grate. Basically just wanted to know if my 701 still ran.
First off, stock 701 exhaust is not ideal for clearance. Going to require moving the stock hood tubes and ducting extensively. Major vibration during test ride. Might be sorted but still need to pad around waterbox so that is possibly the source of continued vibration. I did cut the battery box as suggested.

that said.

It is a certified rocket ship.

what the licorice power in a JS hull.

do it.

I also love this kit. RHAAS is good. Not fast, but good.
 

550headache

tobacco grower
Location
tobacco valley
I had a bad vibration on my Yamasaki.. first thing i did was cut the battery box out on the carb side front corner where one of the bed plate bolts hits it. Helped, but still there. I dented my 650sx pipe with a mallet to clear where it was touching the motor….still there. It’s a lot better but i notice it. It’s just offf idle then clears up. Next thing I’m going to do is remove the all metal super trap water box and turf under and behind it. Hopefully that’s it! If not I’m going to pull my brand new Jetnetics flywheel off and put the stock on back on.
I REALLY hope its the water box!


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I had a bad vibration on my Yamasaki.. first thing i did was cut the battery box out on the carb side front corner where one of the bed plate bolts hits it. Helped, but still there. I dented my 650sx pipe with a mallet to clear where it was touching the motor….still there. It’s a lot better but i notice it. It’s just offf idle then clears up. Next thing I’m going to do is remove the all metal super trap water box and turf under and behind it. Hopefully that’s it! If not I’m going to pull my brand new Jetnetics flywheel off and put the stock on back on.
I REALLY hope its the water box!


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If you don’t currently have padding under your water box that could definitely be causing vibration. I slid a chunk of cork and rubber gasket maker under mine and it helped some. I also plan to turf the area so I’ll keep you posted.
 

smokeysevin

one man with a couch
Site Supporter
Location
Houston
If you don’t currently have padding under your water box that could definitely be causing vibration. I slid a chunk of cork and rubber gasket maker under mine and it helped some. I also plan to turf the area so I’ll keep you posted.
Here is how I did mine, its wrapped in turf, wedged with a shaved yoga block, and strapped using a yamaha strap clip and seadoo waterbox strap. Doesn't leave room for a front fuel fill though.

Sean
6bc8c22df4d37bde1be6cb829e19f7d7.jpg
 

550headache

tobacco grower
Location
tobacco valley
Looks good! Ill do that for sure but i have to wrap my super trapp water box with turf and zip tie it on because i have to be able to service the discs every season.

I highly recommend the wax racing internal fuel fill. Very well made and looks good as well for a fair price.
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Don’t pay attention to the pipe on there. I took a piece of 1 inch pvc about the same length as the pipe and capped on end. The other end is capped with threads so its water tight. Keep my reg and copy of my drivers license and boating certificate in it. Why these manufactures didn’t incorporate a dry box on stand up’s is beyond me!


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smokeysevin

one man with a couch
Site Supporter
Location
Houston
Good idea on the dry box placement, I have been trying to figure out where to put one.

I have been really happy with all my wax stuff, well made and reasonably priced.

Sean
 

550headache

tobacco grower
Location
tobacco valley
Good idea on the dry box placement, I have been trying to figure out where to put one.

I have been really happy with all my wax stuff, well made and reasonably priced.

Sean

Only problem i have with them there in Australia and it takes a little longer for your parts..

I ordered a TDR water box from vintage jet ski in June and still haven’t gotten it! Also ordered a Custom Matt kit a month ago from jet trim. Hoped to have it on before the riding season ends. That’s not happening. Sucks!


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