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So I did the PAIR system delete a while back after debaffling my stock exhaust. Didn't do the entire removal (thankfully), just plugged the one hose.

Recently moved to the Phoenix area. Went to go get my emissions inspection to get AZ plates. Failed for a high CO count. Did some reading on the PAIR system and it seemed like that was the likely culprit. Unplugged that one hose, and brought the bike back for a retest on the same day. Passed, no problem.

So, the take away is that if you live in Arizona (or some place with stringent emissions tests), you may have a problem passing the emissions testing if you do the PAIR system delete. In Pennsylvania I don't believe they even tested for emissions so it was never a problem before.

Something to consider before you do that mod.


--Jeff
 

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The PAIR system is part of the Emissions Control set up, adding air to the exhaust gases at certain times to 'clean up' un-burnt fuel.
To me, it seems obvious that if you disable the main emissions system on your bike, you might not pass the emissions portion of an inspection. Kinda like saying you removed your headlights and then were surprised you could no longer see at night.
 

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I put an M4 slip-on on mine, and now I get the popping (it's only in 3rd gear though) and like it. I didn't do anything to this "PAIR" system. Is the popping good or bad? I like hearing it when I go through town, echoes around the buildings, haha.
 

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I put an M4 slip-on on mine, and now I get the popping (it's only in 3rd gear though) and like it. I didn't do anything to this "PAIR" system. Is the popping good or bad? I like hearing it when I go through town, echoes around the buildings, haha.
As far as performance goes, it's neither good or bad. It just "is".

For the environment, it's supposedly good :)
 

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I thought thats why we modified the exhaust....to ge the pop, lol.
 

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IMO, the amount of CO's the bike puts out with or with out the PAIR system is the same..the PAIR system simply dilutes the amount per volume, PPM in this case. The fact that the air is injected post the exhaust valves, further supports that the byproducts of the combustion in the cylinder itself, are still the same coming out.

I have heard/read the theory that the extra air aids in post cylinder combustion...but personally, I do not believe that any more than the single bullet theory.

IMO, its just a way for the engineer's to get these things to past emissions testing...and "fool" the equipment.
 

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IMO, its just a way for the engineer's to get these things to past emissions testing...and "fool" the equipment.
Pretty much my completely uninformed *guess* about what the PAIR system is and does, as well.

I doubt disabling it or leaving it enabled has any real effect on the environment either way.

However, leaving it intact will help insure that your bike passes emissions testing...if your state tests emissions. mine doesn't :p

but I never really understood the whole "gotta get rid of the popping!" mindset. I LOVE THE POP! :rock: :bacon:
 

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Welcome to AZ!!!

What happens is that you did not Dyno Tuned your Power Commander USB III...

If you have done it your bike would have passed!!!

Luis - 602 980 5707 - Lets Ride - http://www.southwestrides.com



PS: of you do not remove or block the PAIR Valve that cool "popping" will burn up your exhaust packing material real quick...
 

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I post this every other week but here goes: if you really well seal all the joints (midpipe ans muffler) with high temp RTV, you will almost completely eliminate the popping.
 
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