Thread: STX12F Mod Thread
04-12-2010, 01:28 PM #1
STX12F Mod Thread
Ok folk's...After reading a thread below about air intake I decided I would start a 12F mod thread. My 12F is boner stock. I do want to do a air intake mod, water box (2nd) delete mod, intake grate, etc. etc.
Basically I want to do all I can to speed it up without compromising the longetivity and reliability of the ski.
I know Smokey has a fast 12F and I'm sure some others have done well with theirs.
Please post pix of your mods, like the intake grate mod, air intake, etc.etc.
If a mod wants to make a sticky out of this thats cool.
Thank you and let the fun begin....
The first 3 I want to do on my ski is the air, grate and waterbox mod. Any one have any photo's this always helps.
Thanks again guys,
04-12-2010, 02:24 PM #2
Its nice to see more people working on the stx skis,
the big thing with the 12f is getting the front out of the water and doing timing helps, it was good to bump me up 300 rpm the wet pump mod was good for 1 bar I need to check my pump though im down at 7000 sometimes 7 plus 1 bar I was at 7 plus 3 at the end of the year last year...
First thing I would do is change the oil and kick the timing wheel over a few degrees, that with the air intake and exhaust really woke the ski up. the other thing i have done is relocated the intake air sensor from the manifold so it reads cooler and kicks the timing up a little and adds more fuel. you have to plug the hole though or you will run really lean.
the only other thing I can say is try the shread master plate I have heard it was faster from a few people than the r&d plate
hope that helps If you have any questions feel free to ask thats what i am here for.
04-12-2010, 03:29 PM #3
When you can, and I know your busy.....Pix please.
I want to do the exhaust and intake mod soon. Also the intake grate cut.
I guess what I'm saying is step by step for a mechanical moron such as me.
Any one that has done the air intake mod on there own and can post pix and parts list please do.
And a big thanks to you Sean. I really like my 12F.
04-12-2010, 03:38 PM #4
- Join Date
- Aug 2009
- San Diego, CA
Im glad to see there are other guys modding their 12F's....I just recently put a Riva Performance Filter Kit on mine and plan on the exhaust mod soon. Ill post pics of the Riva filter kit later if you guys are interested.
04-12-2010, 05:02 PM #5
I'm interested in seeing all: Homedone and after-market. So heck yeah! Bring 'em on and post 'em up!
04-12-2010, 05:29 PM #6
I will get you a step by step of as much as i can, i have to freshen up my pump and do a few other little things so when i do i will throw pictures up.
the exhaust is really straight forward
buy this in 2.75 inch size, then you take the stock exhaust couplers off the water box and remove the waterbox as shown on page 4 the part with the bottle jack, yeah its a pain in the butt but it works, next take the intercooler piping and install it on the 2 exhaust hoses as shown here , make sure to get it tight, then install and enjoy.
The filter in the bucket is listed somewhere else ill try and dig it up
and here is the wet pump mod, I will get some pictures of mine when i rebuild the pump (157 hours on original stuff)
04-12-2010, 06:40 PM #7
Can a Moderator make a sticky out of this thread please. Just want to make it easy for us 12F guys to find our stuff.
Thanks for servin' it up Sean.!!!
04-12-2010, 07:13 PM #8
04-12-2010, 07:49 PM #9
04-12-2010, 07:54 PM #10
We all asked for 2 section, ULTRA / 12,15f
only other way to seperate with ease is to start a build/build data base
and the word IMPORTANT doesnt mean your ski aint
just a section mainly for general high priority point that concern all of us
otherwise the sticky will become a waste of space
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