Thread: Safe offshore Back air vent mod
05-14-2015, 08:06 PM #1
Safe offshore Back air vent mod
Here's my back air vent mod i been working on,
This vent box allow to remove the restrictive hoses that hang to low while the hot hair hang on top, it evacuate the hot hair while blocking water from getting in when the ski flip over,
it is as close as having open vent with no pipe without taking the chance of sunking the ski
the video show the box when it flip over.
Before somebody yeld at me, i will clarified a thing! the box is water resistant! and not 100% waterproof!
The purpose of it, is to slow down the infiltration and allow time to flip back the ski, i'm not trying to build a submarine
the leakage is very low ( not even 2 liter per 5 min immersion)
i will do more intensive offshore testing this summer!!
Dont mind the fit and finish! this is a prototype
Last edited by brisyl; 05-14-2015 at 08:38 PM.
05-14-2015, 08:08 PM #2
- Join Date
- Apr 2015
05-14-2015, 09:36 PM #3
wow alot of work gone into that would be hard to justify any gains from effort or price tag. i suppose it all comes down to how much you trust yourself as a rider and what you are prepared to do on your ski. i have had the rear tubes removed from my first 250x from back in 2008 i have done it on every ski after that i have owned my ski is insured i ride in the surf to this day i think i ride/jump sensibly enough to trust what i have done. if i ever come off and it flips thats the chance i take. but with all the other airvents in my ski i dont think it would help much. nice work though as long as you are happy thats all that matters here.
05-14-2015, 09:37 PM #4
Nice... did you weld that box yourself with the vents?
05-14-2015, 10:31 PM #5
05-15-2015, 01:58 AM #6
Personally I think you have REDUCED the flow rate ofver the standard hose.
I have been doing the EASY SIMPLE PROVEN SAFE rear air mods that IMPROVES AIR flow by approx 25 % per inlet
these can be purchased from www.kspeed.com.au http://brisbanekawasaki.com.au/produ...ir-vent-tubes/
I have been making enlarged FACTORY STYLE fittings that increases the size from Factory 60mm ID upto 76mm ID ( 80mm OD )
then I just buy so 80mm ID smooth internal finish hose and install as per stock. But you do need to just trim the rear seat base a few mm so they can come threw the black plastic like the OEM units..
then you have 100% SAFE high flow design that bolts into the STOCK HULL position .
so when you think about the numbers I can PROMISE you it works EXACTLY the same gains as NO rear tubes , just SAFE
now consider adding 5 of these like I do on my skis,
OEM = 4 x 60mm ID vents ( 240mm total )
NEW STYLE x 5 = 375mm total SAFELY.
easy HP I tell you, may aswell ride with you seat off all day
But its always good seeing people try other ideas
P.S what does the video mean to show, because as soon as you push it in further water will flow straight in !!!
Last edited by sirbreaksalot; 05-16-2015 at 02:00 AM.
05-15-2015, 04:38 AM #7
I think it has an internal flap waz, but you maybe right the weight of the ski may just neutralize it
05-15-2015, 06:00 AM #8
05-15-2015, 06:00 AM #9
05-15-2015, 06:03 AM #10
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