Jonny5's stxr Project....

[jonny5]

Well I thought I would start a project list ...Not sure if im supposed to get permission or somthing.

Anyway since im going thru a small make over on the ski along with some small mods here and there I figured this would at least help a few out.

This project wont be blown thru in a month or 2 but over the time span of now untill the end of summer since I do still have a job and cant play all day like water woody does....

So I will be posting some pics here and there and updating what I will be doing.

So here goes......

[jonny5]

Current info...

2003 stxr...bought from stock class racer guy....
recieved ski kind of beat up....one of my worst purchases....

impeller had some ching gows here and there along with poorly sealed pump shoe.

Speeds then with bone stock R&D grate and plate where 60.5 mph best @ 575ft 75 degrees and about 50 degree water temp slight ripple/glass

This is at keswick where I normally do my testing and the only thing that changes is the air temp and water condition. Level only goes up and down about 15ft.

I also Ride at Lake Shasta alot. So I will post numbers up there as well.
The best speed I got there was 59.5mph @ 980ft

This is a race setup with sponsons down and forward and full grate.

Supossoably the stock grate and plate will net another 2mph...because of the R&D grate does hang low and grab alot of water.

After I modified the grate the new best speed was 61.9 mph butI have alot of pump work to do..so this is just some base line stuff and we will see what happens. I do have a deadline which is May 1st because im going on a ride and will need the ski back together.
Here is a shot of it as it stands now....well a couple days ago

[jonny5]

So here is a pick of the bottom of the hull that is going to be retrued and have alittle body work done then be painted black....


And a pic of the back where shoe has been removed along with the rest of the under water gear except for shaft and cable. Silicone has already ben taking off.


picture of the impeller after I had filed it down and sanded it some but still needs to be sent off....

And the other side of the pump which I will do some work on but nothing crazy...this thing wont be doing 80 but alittle attention to detail should help alittle...

Here is a pic of the R&D grate that I modified. Not all the way completed needs some finishing. No pic Of the original sorry..this really helped the ski lift some in the front and also lossened it up some Before it was to sucked down....



So working on the bottom then will be putting it back together.....ok got to go...wife is calling tell me to pick out baby names....

[jonny5]

So Hull is almost bare......Motor is out along with electrical and water box...just some top deck stuff and fuel cell.

I found out I have a 14/24R prop in there from Skat....im not exactly sure im going to do with it yet.

Found some thing here and there I can do in the pump area to make it alittle more efficient...so ski goes to paint and body work next friday....and will have back that sunday night or monday morn.

Will get more pics soon.

[jp1300r]

J5, I am keeping an eye on this thread. I have a 15F, but your hull mods should translate to my hull. What kind of RPMs are you turning with that prop? I like the results you had with the intake grate mod. Keep the pictures and information coming.

Thanks, JP

[jp1300r]

Do you have a before picture of the intake grate?

JP

[jonny5]

If you look up in the other post 15F budget project on the 3rd page there is a R&D grate there that is uncut.

I am turning about 7050 to 7120 rpm with that prop...day fuel air...makes the variance.....

I do have some pump stuff to do and I will tell what im doing ....when I do it...right now I just need to get the ski out for paint and bottom work.

On your ski you should not have a hook in the hull but I dont know if anyone confirmed it. I know the stxr had one in 02 and 03....But I guess 04 on the took it out...??


ANyway Im hoping the few things I do and attention to detail give about 1.5mph....then a couple bolt on's for another 2mph hopefully...?? but unlikely.

I plan on more grate mod.....prop mod...seal shoe and plate...then jetworks and carb boly up but a aftermarket head first then bolt carbs to see if there is a differance.

Well ....I thought there was more.....Im sure there is but we will see..

[jp1300r]

I don't have a hook in my hull. But my R and D plate does. I ride in smooth water most of the time, so I am going to take the hook out of the plate. I have a great holeshot now without getting over the handle bars. I really don't think I need anything pushing the front down, its already pretty nose heavy.

[jonny5]

take that 10 pound storage bucket out...or is that one screwed in...??

[jonny5]

Well ski is striped and ready to head out next friday for body work and paint,..





This ski is really light compared to stock gpr hull. But gpr is more derable...and easy to fix..But only took me and hour to take motor out and every thing else except fuel tank. Which was suprising...

Anyway now that the easy part is done putting it back togther will take alittle longer...im going to buff out the top deck when I get it back then clean everything when it goes in...replace some hard where and a little paint.
Well I'll keep pics coming..

[jonny5]

Well the bottom is trued and painted ...it atcually was pretty striaght but it did have a decent amount of dings in it. The hull also had alot of piant and filler and some rattle can sprayed on... The guy I bought this from was an idiot...

The ski also lost about 2 gallons of water when we flipped it and is still going to be sitting empty for a little while so the hull can sit in the sun, so any left over water can run towards the rear where I drilled a hole in the inner liner. It's pretty much all gone but a little is still showing up so after a week or 2 I will fill some holes I drilled and then start putting it back together. Although I will be putting the pump shoe in sponsons on and a few other things I can do. But the water thing is going to slow me a couple weeks.

So here is a pic of the bottom...

[gallitos98]

Kawasaki STXR

Jonny
Your Works looks very good. I like the black color on the bottom.
When I first buy the Kawasaki stxr on 2004 in Puerto Rico I race the unit and it make 63.5 MPH with the fuel tank full with a radar gun. I don't know why you are making 60 MPH I see you use intake grade and these stop the ski about 3MPH.
After 2 weeks of purchase I buy the compresion head and 14/24R skat impeller and not a lot of difference with that modifications. I think the ski just not run as fast as the original impeller in the hole shot. I order the Novis Carbs 48 and the Advent Cdi ignition,New modify Water box install and reed valves the ski after that runs only 65MPH with the fuel tank almost empty. We tried different modifications an no power was increase. Compresion head 40CC domes at that time using pump gas.
I already buy the Tripple pipes header from Factory pipes and the advent ignitions has been sent to be re-program after that modification with the engine port and compresion head 36CC domes was running 74MPH. We already install spacers at the reed valves and a new 14/25R impeller has been install but we got a problem two of the pistons worn out due to carburations problems, we replace at these moment the 3 pistons with new compresion rings and increase the compresion with 32CC domes using race gas and 3 fuel pumps, the ski feels very fast. I hope it runs 76MPH. the impeller at these moment spins a lot when you press the gas at the hole shot but we are secure that we are going to fix that problem after we install the Skat trak pump with 14/25 prop.
I will let you know after we are done with these modifications and I will send you some pictures of the MPH gun.

Take care.

[jonny5]

Thanks for the comments. As far as the ski running about 61 that is actually stock speed ...or average according to 4 magazine tests. If I put the stock intake grate on Im sure about another mph or 2 would put me right about 62.5 to 63mph. Of course im also dealing with a couple dings in my pump and on my impeller. So that im sure is not helping.

I have a couple of pics I will be putting up later of the progress which is kind of slow going becuase I have been busy. But it's looking good.

The reason Im keeping the R&D grate is because I ride in rough water more than smooth.

I would like to try a stock grate though to compare speeds.

[jonny5]

well here is a pic of the intake grate installed and modified more I sweeped the rails back to make it more like a tunnel or pickel fork boat. Before the front of the grate actaully just went striaght down about 3/8 inch then started to sloop back so I thinned them down in front and slooped it back...

Another pic also looking from front to back and one from the rear looking into the pump...







Getting there but slow going....

[jonny5]

Here is one more of the rear of the ski as im pieceing it together.

Notice no more speedo since the wire was already cut and gone figured I will plug it.