Jump sub

[DAG]

A successful sub
http://i87.photobucket.com/albums/k126/grifnasty/sub-bullethole.jpg

I'll start with something easy, this is one of the 1st few tricks you will try when you 1st start freestyle.


To pull this trick off successfully:
Start out by going straight at medium throttle to get just above plaining speed. Once the ski is plained you need to hop the ski twice. The first hop you are trying to unweight the ski and prepare for the 2ed hop. The 2ed hop you are trying to get as high as possible.

When you hit the water landing the 1st hop have your knees slightly bent and mash the gas. Once you leave the water on the 2ed hop you need to bring your knees as close to your body as possible in a squatting position. (but dont bring your body to squat in the tray, bring the back of the tray to touch your auss) Once you have the back the ski out of the water and your knees towards your chest, you wont to firmly push the handle pole forward and slightly down. The idea here is to pre-angle the nose of the ski to go down into the water. Once you enter the water stay squatted/ducked lightly pulling the throttle to about a quarter open. This allows you to pull through and ride out the sub.

This is the approch angle you need to take when going in... notice the pooping squat
http://i87.photobucket.com/albums/k126/grifnasty/sub-waterwall.jpg






Tips
#1) You don’t need to be going fast when trying this trick.
#2) You don’t need to get the ski perpendicular to enter the water, a slight shallow angle is desired
#3) A good hoodseal is your friend, allong with outwares, bilge pumps and hoodstraps.

[SuperJETT]

Here we go.

YouTube - jump sub (http://www.youtube.com/watch?v=BEF6dSKKD9g)
YouTube - another jump sub by SuperJETT (http://www.youtube.com/watch?v=S2NE--sTyQI)
And here is jetskee
YouTube - jump sub by jetskee (http://www.youtube.com/watch?v=i28mLSN4SjU)

Ride along maybe 1/4 throttle, a little more if your ski isn't so strong, do a bounce to get in the air, while in the air, pull the tray up with your feet (lifters, footholds, or nothing) and push the handlepole forward to get the ski at a good angle to enter the water.

When the nose hits, nail the gas so the ski will pull itself under.

Keep your head down and make sure you're crouched so the water doesn't rip you off the ski.

Once under, depending on how deep you're going, let off the gas to get the nose to come back up, then give it a blip to pop up and drive out. Sometimes I have to blip it once to level the ski off underwater, then again to pop up. Having a good hood helps with underwater power.

If you get fairly deep, you can also turn the bars to do a 180 while under.

In this pic, you can see I have pulled the tray up pretty far, my toes are still hooked into the footholds, my arms are extended after pushing the nose down, and I'm probably pulling the throttle right then.

[Superjet Geoff]

nice videos! thanks Jett.

[spence]

sweet do you need footholds to get the back end up and nose down?

[SXIPro]

I like the underwater 180 idea, looks killer when you are coming out of the water in the opposite direction you went in. Gotta try that one, for sure. :biggthumpup:

[sxi steve]

sweet do you need footholds to get the back end up and nose down?

No, you can accomplish this trick without straps or holds. Pushing out with your feet to the sides of the tray is sufficient. :biggthumpup:

[ToddW]

No, you can accomplish this trick without straps or holds. Pushing out with your feet to the sides of the tray is sufficient. :biggthumpup:

Yup, my right foot cramps up bad due to this! Footholds this winter for sure.

With d-cut rideplate or factory ride plate I've found it harder to pull-up the rear than with a slightly longer one just because the nose comes up a lot more with the shorter ride plates and require a lot more lifting in the rear, esp. harder w/out footholds.

-Todd

[spence]

what if u dont have a bilge?

[SuperJETT]

Shot this today, nice and deep with a turn underneath.
YouTube - jump sub (http://www.youtube.com/watch?v=Wq5sIpz5j_I)

[crazyass911]

Yup, my right foot cramps up bad due to this! Footholds this winter for sure.

With d-cut rideplate or factory ride plate I've found it harder to pull-up the rear than with a slightly longer one just because the nose comes up a lot more with the shorter ride plates and require a lot more lifting in the rear, esp. harder w/out footholds.

-Todd

ever since i have had a d cut ride plate i have had a hard time pulling up the rear of the ski. is there a different way to do it when you have the d-cut ride plate.

thanks sean

[DAG]

jett, when you do your turn under the water... thats the trick?

[spence]

that looks sweet with a 180 turn underwater!

[SuperJETT]

jett, when you do your turn under the water... thats the trick?

Nah, just an added variation to it.

[sxi steve]

what if u dont have a bilge?

A bilge pump is needed. I wouldn't play around under water without one. Jump subs, Turn subs, deep Nose Stabs, etc..., water gets in, gotta get it out quick.

[DAG]

BY TRICK, i ment whats the tips. do you just turn going down with teh gas like half open.. or wait ti'll you bottom out ot on your way back up? justs whats the steps happening underwater...

[SuperJETT]

BY TRICK, i ment whats the tips. do you just turn going down with teh gas like half open.. or wait ti'll you bottom out ot on your way back up? justs whats the steps happening underwater...

Ah, I really don't know, I just do it. Based on the spray when I enter, I'd say I have the bars straight at first then turn them.

I'll have to pay more attention next time I do to see what I do.

[spence]

i think im starting to get it but im worried i need a bilge does anyone have one? should i get automatic what do you guys have?

[sxi steve]

i think im starting to get it but im worried i need a bilge does anyone have one? should i get automatic what do you guys have?

You need a bilge pump !!! You can purchase the Rule 500 bulge from local marine store. Enclosed is Overtons. You need; the bilge pump (and glue to install to the bottom of your engine compartment, I use 5200, works well) and a Thru Hull Fitting. Some clear hose and maybe a couple elbows (from the local hardware store), and a plastic on/off switch (I purchased from Murrays Discount Auto). I have a 750sxi/pro, mounted the switch on the 3 screw plastic cover just forward of the handle bars, on the small surface which is angled on aprox a 45' angle (on right side). I can flip it easily with my left hand and it's tucked away nicely, so I don't hit it.

http://www.overtons.com/modperl/product/details.cgi?pdesc=Rule_Bilge_Pump_Open_Flow_Capaci ty_500_gph_Hose_Size_3/4_Amp_Draw_2_5_Pump_Dim_4H_x_2_7/8W&r=view&i=21319&aID=

[wnb800]

i do them without a bildge all the time, on the sxr if you just ride for like a few minutes the majority of the water will come out of the plug's 1 way valve

[onesojourner]

go to walmart get an atwood 500. they are 10-13 bucks.

[spence]

onesojourner whats an atwood 500?

[Jetaddict]

Did a couple on my SXR today and the other day, no bilge, no blockoff and no duckbill yet. Very little water got in, and the majority of it was gone after riding around a few minutes. Is there a stock bilge in the SXR's?
Just don't do too many of them in succession without checking the water level- ride around in between.
Duckbill and blockoff will be here Friday. That's the weekend project.

[GinoNewOrleans]

Me trying sub's

http://web.mac.com/ginoascani/iWeb/Site%202/jet%20ski.html

[gemiller]

Did a couple on my SXR today and the other day, no bilge, no blockoff and no duckbill yet. Very little water got in, and the majority of it was gone after riding around a few minutes. Is there a stock bilge in the SXR's?
Just don't do too many of them in succession without checking the water level- ride around in between.
Duckbill and blockoff will be here Friday. That's the weekend project.

the stock system is what is called a venturi i have read here, its just like on my 550 kicks in around 3k rpms and it just dumps it out with rest of exhaust water and junk.

[Jetaddict]

the stock system is what is called a venturi i have read here, its just like on my 550 kicks in around 3k rpms and it just dumps it out with rest of exhaust water and junk.

Ahhh OK....so it will only work if you are moving above idle- that's good to know. I floored it and cruised around a bit before trying another. Thanks!

[c_legaspi]

first i need to learn how to hop my 750 sx. any tips

[spence]

c legaspi jump up a little pull on handlebars to get nose up and then push on handlebars to even out and start to jump higher and higher.

[spence]

also i still dont know what and atwood 500 is is it a name on bilges?

[c_legaspi]

thanks ill give it a try.

so to clarify things for me, do you jump and pull up the bars at the same time and then push it forward/downward.

how about throttle. do you gas it as you pull up on the bars too to get the rear end up or do you just try to pull it up with the feet and legs.

last time i tried it, all i did was jump up and down on the ski to see if i could get it out of the water.

i guess ill keep trying.

[SuperJETT]

Posts #1, 2, and 9 explain it fairly clearly if you ask me.

thanks ill give it a try.

so to clarify things for me, do you jump and pull up the bars at the same time and then push it forward/downward.

how about throttle. do you gas it as you pull up on the bars too to get the rear end up or do you just try to pull it up with the feet and legs.

last time i tried it, all i did was jump up and down on the ski to see if i could get it out of the water.

i guess ill keep trying.

[c_legaspi]

yep, they even included pics and vids but i still aint hoppin. i guess i just got to try harder.

[djkorn1]

Keep tryin... you'll get the feel. :bigok:

[spence]

you can gas it on the way up or not go about half throttle depending how fast that is on ure ski. If jumpin real high dont hold wfo in air unless u got a rev limiter

[Vumad]

I used boat wake to learn how to sub.

A boat sends 3 waves for it's wake. I hoped the ski once (by pushing down and gasing it) and landed on the down side of the 1st wave (not bashing through the 2nd wave!). I Rode up the second wave and jumped as hard as I could. At first, I couldn't pull the back up the ski up, so the back of the ski will smash into the 3rd boat wave and force the front end down fast. I put some weight on the front and it burried the nose of the ski. I used the leverage of the wake to get the front down.

After that, I have been practicing getting the back of the ski higher so I didn't have to bash a wave. I've gotten better and can do a sub w/o hitting the back of the ski against a wave.

For the best pop, use the upside of the 1st wave to land on the down side of the second, that will give you a lot of momentum comming off the 3rd and largest wave.

They are all crutches and you don't necessarly need to use them, but it certanly helps to learn the trick.

As a side note, my 650sx doesn't have nearly the power a lot of people have. Timing boat wake correctly compensates for less power in the ski.

[Jetaddict]

I got real frustrated today trying to pull off subs, and found this common denominator.....SPEED IS THE KEY. If you go too slow, you won't get enough momentum to really dive the nose into the water DEEP. At slower speeds, you will bury the nose, but won't truly sub the ski. Go fast enough and get on plane, then jump, pull up the rear, push down on the bars and push your body forward. Gas it on the final jump, blip the throttle throughout the move and gas it once you are under to pull out of it. I pulled off only two out of 30+ attempts- and finally realized I needed to go a lot faster than I was going originally.

[spence]

please someone tell me whats an atwood 500????

[c_legaspi]

cheap bilge pump that you can pickup at walmart

[spence]

how much is it is it a good one? Link anyone?

[SuperJETT]

http://www.attwoodmarine.com/products/parts.asp?productid=74&path=pumps&category=1&gtype=1&group=1&subgroup=2&categoryname=Pumps+and+Accessories&typename=Electric+Bilge+Pump&headername=Pumps+and+Accessories

I like them better than Rule pumps because they don't airbind like the Rules will, pull less current, available at Wal-mart, and you can chop the outer plastic housing off to make them tiny to fit anywhere.

[spence]

do they sell everything u need at walmart? Also i need this for a bilge pump right?
bilge pumo abviously
hose
switch
thru hull fitting
is it worth getting an automatic bcuz the switches are normally like 50-75 bucks?

[ToddW]

do they sell everything u need at walmart? Also i need this for a bilge pump right?
bilge pumo abviously
hose
switch
thru hull fitting
is it worth getting an automatic bcuz the switches are normally like 50-75 bucks?

Don't get an automatic bilge they cycle you need one to run all the time or atleast when you WNAT it to.

[Jetaddict]

Agree- forget the automatics. It's more expensive to get the switch, but it is a lot more user-friendly of a setup. You also have to mount it in the compartment, so don't forget you need a mounting bracket or some kind of makeshift holder at the bottom of your ski. I am going to be using a duckbill/bilge setup. I will only use the bilge in heavy surf riding and during subs. The rest of the time the duckbill will hook me up.

[Vumad]

http://x-h2o.com/showthread.php?t=21409

SXIPro has been selling some excellent switches for cheap. I just got mine and it looks good. Installing it tonight I think.

Check on it, he might have more.

[spence]

id guess those switches are sold out by now. Cn i use a 2 part apoxy or something else to put it in the hull? The blowsion mounting thing is expensive!!!! whats a duckbill?

[crazy4sand]

sweet do you need footholds to get the back end up and nose down?

i dont use them i just hug the sides as tight as i can the whole time ,

[crazy4sand]

oh yeah the best boat wake ive used for subbing is a wake from our pontoon boat

got 10ft distance one time..

hers a video go to about :27

http://www.youtube.com/watch?v=s6ONDmtMMCc

[Jetaddict]

id guess those switches are sold out by now. Cn i use a 2 part apoxy or something else to put it in the hull? The blowsion mounting thing is expensive!!!! whats a duckbill?
Yes, you can. Some guys on here do that. Make sure you use good epoxy, otherwise all the jumping you do may shake it loose. I tried that also, and after one day the thing came loose and was rattling around near my driveshaft.
Since I posted this, I ditched the duckbill. I lost two of them, and almost sunk the ski. I am running a Versiplug, and have been for a long time...no issues at all.

http://www.shop.ejfengineering.com/category.sc;jsessionid=8D322B31697A314F0C1620315D5 55685.qscstrfrnt04?categoryId=2

[FJXP]

I do them all the time on my SXR and yes Footholds HELP ALOT, if i have enough speed and jump high enough it looks like i'm doing a nose stab...i hit the water so hard that i go over the freakn handle pole....i'll post a vid later

[Blasterguy]

can some one tell me how to do this with a B1 ?
I'm assuming you need foot straps on a B1 to accomplish this trick ?

Thanks

[FyrHazard]

There was a vid on here somewhere of someone subbing a b1. You need to get the rear end up pretty steep to actually get it to go under. Straps would help but you could hook the seat with your calf or something. The hard part with a b1 is hanging on when you hit the water. On a b1, you have a lot more exposed area than a standup, and you can't crouch down - so you get PLOWED by the wall of water.

[orangefinger]

YouTube - submarine wave blaster 700

Sub tha blaster

[tightithrash]

man how'd the bars straight to the gutt feel......ouch

[orangefinger]

that my friend i dont know...:clown:

[jetskisteve]

If you still aint got it practice in a boat wake in the middle where it is calm it will suck you in just stay back away from the boat thats how I got the feel for it then you can do it all the time

[munki63]

something i learned is over commitmentand too much speed will throw you over the handle bars and the ski will go under water... you wont

This is my fist sub last year..im much better now lol
no foot holds, no boat wake
http://www.youtube.com/v/i-vpjMUIvGc&hl=en (http://www.youtube.com/v/i-vpjMUIvGc&hl=en)

[txsuperjetfreak96]

i used to do theme with out bilge pump, just useing the factory bilge which sucked had to ride it full throttle. then i put a bilge on , definately need 2 if u dont hava scupper valve, by the way which scupper is better blowsion or wamiltons.