pair valve sucker mod

Q

quizesilver

Registered
anyone heard of this.
i heard is goes something like this...

reroute the hose from the pair valve from the air box to the crank case breather.
then take the crank case breather hose and plug to the two plug at the air box.

anyone done this mod before?

thanks
 
www.hayabusa.org

Pair Valve mod | General Bike Related Topics

Hey friends, who has done the pair valve mod and whats it for? How do I ... Thanx - Kent
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Black Mamba Motorcycle GIF by Moore Mafia
 
Here...to answer this 16 year old question.
Pressurizing the crankcase on big cc bikes, 900ish and up, is supposedly usually good for 2 to 3 hp.
I have my '03 Gsxr1k this way, as did a few of my friends over the years.
We never saw any negative side effects, but with almost 40k on my engine, I'm curious to see if any gaskets will give up, lol

Screenshot_20241015-081823_Gallery.jpg
 
sixpack577 said:
Here...to answer this 16 year old question.
Pressurizing the crankcase on big cc bikes, 900ish and up, is supposedly usually good for 2 to 3 hp.
I have my '03 Gsxr1k this way, as did a few of my friends over the years.
We never saw any negative side effects, but with almost 40k on my engine, I'm curious to see if any gaskets will give up, lol

View attachment 1688194
Click to expand...
You aren't supplying that much positive pressure to blow gaskets.
 
Rojo said:
www.hayabusa.org

Pair Valve Sucker Mod Instructions??? | General Bike Related Topics

Hey fellas, I've looked all over this board and found all kinds of opinions on the pair/sucker mod, but I can't find any instructions on how to do it. I know it can't be that hard cuz there's only 2 hoses that can be screwed with from what I can tell...I currently have blockoff plates...
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Click to expand...

I had posted before about moving mine so oil wouldn't find it's way out somewhere it shouldn't, and was going to buy block-off plates.
That would require me to vent to the airbox as he said.
Good info Red.
 
www.hayabusa.org

re-directing pair hose to crankcase? | Engine and Performance mods

hey guys, i was planning to do the marble mod tonight ive been reading alot about the PAIR block off and marble mod lately. I read somewhere earlier that you can re-direct the hose coming from the airbox to the crank case and this in effect would allow your engine to rotate much easier therefore...
www.hayabusa.org www.hayabusa.org
IMG_0097.jpeg

My Gen 1 has been modified to suck crankcase vent line straight out to the atmosphere •
 
Last edited:
Rojo said:
www.hayabusa.org

re-directing pair hose to crankcase? | Engine and Performance mods

hey guys, i was planning to do the marble mod tonight ive been reading alot about the PAIR block off and marble mod lately. I read somewhere earlier that you can re-direct the hose coming from the airbox to the crank case and this in effect would allow your engine to rotate much easier therefore...
www.hayabusa.org www.hayabusa.org
View attachment 1689287
My Gen 1 has been modified to suck crankcase vent line straight out to the atmosphere •
Click to expand...
I've had this on other bikes I have owned.....
 
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