Is this the PAIR valve? - Honda Motorcycles - FireBlades.org
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post #1 of 22 Old 04-03-2004, 12:34 AM Thread Starter
 
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Is this the PAIR valve?

Im new at the mods scene so go ahead and poke fun... I just installed a Erion full system and everything is working great. The map that i used is for the full system and stock filter. I have a k & n(i know it reduces hp, to expensive to keep buying stock) flapper valve removed.. While installing the erion, i ran into this contraption on the exhaust. Attached to two cables that ran upto some sort of servo. One of the cables went to the airbox for the flapper..No sense in leaving that in there. I removed all the cables and got all that crap off. Back to my ? is this that PAIR valvr and what purpose does it serve...Why would you want to close your exhaust and starve it for ir? JUST CURIOUS
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post #2 of 22 Old 04-03-2004, 12:46 AM
 
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Re: Is this the PAIR valve?

The exhaust valve is simple mechanism used to vary exhaust backpressure which has effects on both torque and horsepower output provides more backpressure at low end where torque is on the rise. However this backpressure limits top end power due to it's adverse effect on peak exhaust flow. Peak flow is required to make maximum power yet is not as effective in making low end torque.
If I am wrong just blast me guys, but I am pretty sure this is the basic function behind your valve and is essentially the same principle for any internal combustion engine.
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post #3 of 22 Old 04-03-2004, 12:51 AM
 
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Re: Is this the PAIR valve?

Quote:
Originally Posted by Nillotuc
The exhaust valve is simple mechanism used to vary exhaust backpressure which has effects on both torque and horsepower output provides more backpressure at low end where torque is on the rise. However this backpressure limits top end power due to it's adverse effect on peak exhaust flow. Peak flow is required to make maximum power yet is not as effective in making low end torque.
If I am wrong just blast me guys, but I am pretty sure this is the basic function behind your valve and is essentially the same principle for any internal combustion engine.
That's not the pair valve, that's the htev valve the pair vale is up towards the top and front of the engine.
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post #4 of 22 Old 04-03-2004, 1:17 AM Thread Starter
 
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Re: Is this the PAIR valve?

[QUOTE=CBR929RRacer]That's not the pair valve, that's the htev valve the pair vale is up towards the top and front of the engine.[/QUOTE
Thanks guys I have seen the light.
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post #5 of 22 Old 04-03-2004, 1:23 AM
 
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Re: Is this the PAIR valve?

http://www.cbr929rr.com/images/pair/no_airbox.jpg

The PAIR valve is up in the front, over the motor. Has the green and orange wires comeing off it, 2 hoses.
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post #6 of 22 Old 04-03-2004, 1:50 AM
 
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Re: Is this the PAIR valve?

Make sure oyu remove the flapper as well if you are removing the cables to the servo (unless you have already done so - or pinned the flapper down)

Z...

You're f%#&king up my Chi...
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post #7 of 22 Old 04-03-2004, 3:50 AM
 
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Re: Is this the PAIR valve?

Quote:
Originally Posted by Bdonkadonk74
Why would you want to close your exhaust and starve it for ir? JUST CURIOUS
This is the question I was answering there guys not the valve question should have made that clear before.

Last edited by Nillotuc; 04-03-2004 at 3:51 AM.
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post #8 of 22 Old 04-03-2004, 4:52 AM Thread Starter
 
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Re: Is this the PAIR valve?

Thanks, I did remove the flapper before i did all the other stuff..
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post #9 of 22 Old 04-03-2004, 10:14 AM
 
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Re: Is this the PAIR valve?

And what is the function of the PAIR Valve?
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post #10 of 22 Old 04-03-2004, 11:22 AM
 
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Re: Is this the PAIR valve?

Quote:
Originally Posted by Northy
And what is the function of the PAIR Valve?
It's for emissions. Injects air into the exhaust ports to burn off unspent fuel. It's where you get the popping noise on decel from.
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post #11 of 22 Old 04-03-2004, 11:28 AM
 
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Re: Is this the PAIR valve?

Quote:
Originally Posted by Sirkbac
It's for emissions. Injects air into the exhaust ports to burn off unspent fuel. It's where you get the popping noise on decel from.
Exactly.

It's basically just an air pump that does little to hinder performance. Still, I think it's worth removing (at least it was on my FZ) if for no other reason than it cleans up the top of the motor and makes access to the spark plugs much easier.
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post #12 of 22 Old 04-04-2004, 7:45 AM Thread Starter
 
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Re: Is this the PAIR valve?

Does anyone have a picture of this pair valve.. I think i've found it but want to be sure....
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post #13 of 22 Old 04-04-2004, 12:38 PM
 
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Re: Is this the PAIR valve?

Quote:
Originally Posted by Bdonkadonk74
Does anyone have a picture of this pair valve.. I think i've found it but want to be sure....
In the bike:
http://www.cbr929rr.com/images/pair/no_airbox.jpg

Out of the bike:
http://www.cbr929rr.com/images/pair/pairvalve.jpg
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post #14 of 22 Old 04-06-2004, 2:16 AM Thread Starter
 
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Re: Is this the PAIR valve?

Quote:
Originally Posted by Sirkbac
Thanks a bunch, i had that thing off when i changed my plugs,didn't know what it was though. doesn't the two hosesthat point down goto the cylinder head cover. Do you just plug the holes?
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post #15 of 22 Old 04-06-2004, 7:43 AM
 
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Re: Is this the PAIR valve?

Quote:
Originally Posted by Bdonkadonk74
Thanks a bunch, i had that thing off when i changed my plugs,didn't know what it was though. doesn't the two hosesthat point down goto the cylinder head cover. Do you just plug the holes?
Yes, plug it. You can use Dan Kyle's (fancier) block off plates or just go to the Auto parts store and pick up 5/8" bypass caps made by HELP. You'll need (3), (2) at the cover and (1) on the airbox. Clamp all (3) with either zip ties or metal clamps. Not sure what's available in Germany.
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