Suzuki PAIR valve removal kit

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MotoF150 · #1 Unread post by **MotoF150** » Mon Mar 05, 2007 10:38 pm

Almost all Suzuki street bikes have a PAIR valve, PAIR means " Pulsed Air Intake Reed" valve. All Boulevards, Intruder, Volusia, and Marauder, both with EFI and carbs use the PAIR Valve. The PAIR valve works like the EGR valve on ur car, its soleniod controled by the ECU that injects fresh air from the air cleaner into the exhaust port of both cyl heads, it re-burns the exhaust gases to aid in lower emissions. A kit can be purchaced to remove the PAIR valve that will end the problem of the constant and some say the normal backfire from the exhaust, in no way will removing the PAIR improve performance. On the M50 and C50 the PAIR valve is located on the left side of the engine covering up most of both cyls, some people just remove the pair valve to improve the looks of their bike. On other Suzuki bikes the PAIR valve is located behind the air cleaner. The problem on the bikes with the ECU is when you dissconnect the electrical connection of the PAIR valve solenoid ur check engine light will come on. so you must leave the solenoid hooked up and you can zip tie and hide it under the gas tank. I ordered the kit for my M50 and when I install it I will keep everybody updated how it worked and if it ended my backfire problem. Thank You

MotoF150 · #2 Unread post by **MotoF150** » Fri Mar 16, 2007 11:16 pm

I have installed my PAIR valve bypass kit, great improvement, ended my backfire problem and it improved the looks of my M50 without that great big plastic chrome cover covering up the left side of the engine. I would highly reccommend to anybody that owns any Suzuki street bike to do this. The only problem is the ecm will detect a fault if the electrical connection is disconnected from the solenoid, you can just remove the solenoid from the valve leave the electrical connector hooked up and tuck the solenoid under the gas tank outta sight, or you can go to Radio Shack and purchace 2 60 watt resistors and hook that up instead of the solenoid, that tricks the ecm in thinking the solenoid is still there. Removing both steel tubes from both cyls were tricky to get out from all the extreme bends in the tubing and the bypass cover on the front cyl was tight to get at, I had to remove the radiator, fan and horn just to get to it, and the 2 chrome screws that screw into the side of the cyls looked better and blended in better when I painted the heads of the bolts with matte black paint. The bypass kit is only $19.95 and its well worth it, some guys use marbels and wood golfball tees, don't do that! Get the kit, works and looks better!

Ninja Geoff · Sat Mar 17, 2007 2:15 am

hehe you paid $20 to bypass that. You coulda just plugged the tube inside the airbox.

Johnj · #4 Unread post by **Johnj** » Sat Mar 17, 2007 3:49 am

MotoF150 wrote: I am an expert and I do admit I have a problem dumbing down my words so you public school educated rednecks could understand. Thank You, MotoF150

MotoF150 · #5 Unread post by **MotoF150** » Sat Mar 17, 2007 1:31 pm

Mr Ninja Geoff, make sure you get ur facts together and understand what a PAIR is and what it does, there are 2 steel tubes and 1 air hose to the air cleaner, the 2 steel tubes make an exhaust connection on both cyl heads, if you just plugged up the one air hose where is that exhaust going to go when the PAIR valve opens? HUH? Its a fact you have NO idea what ur talking about and you have NO idea what a PAIR valve is!

NorthernPete · Sat Mar 17, 2007 2:13 pm

There, he told you Geoff, I bet your just a blubbering mess of tears now eh?

Sev · #7 Unread post by **Sev** » Sat Mar 17, 2007 3:50 pm

MotoF150 wrote:Mr Ninja Geoff, make sure you get ur facts together and understand what a PAIR is and what it does, there are 2 steel tubes and 1 air hose to the air cleaner, the 2 steel tubes make an exhaust connection on both cyl heads, if you just plugged up the one air hose where is that exhaust going to go when the PAIR valve opens? HUH? Its a fact you have NO idea what ur talking about and you have NO idea what a PAIR valve is!

Well, I'm not a genius like you, but common sense would leave me to believe that said exhaust gases would exit through the exhaust header - you know down through those big shiney pipes on the side of your bike.

PAIR - injects clean air into the exhaust gases to "fool" an emissions test. When you have 1000 parts per million and cannot find a way to reduce the 1000 you increase the amount of clean air coming out.

If you simply block off the areas where the PAIR injects air into the exhaust manifold you will alter it somewhat, but you still have extra holes inside your pressurised air box. This will affect your performance because you won't be getting enough air into your Fuel Injection System.

So you machine a couple of airtight plates to cover the holes in your cylinder head. Then you cover the holes in your air box and you're good to go. That's what you paid your money for. If you do as Geoff suggeted you will get the same effect, but still have all that ugly PAIR crap on the bike, to me $20 would be worthwhile to get rid of that, but that's just me.

MotoF150 wrote:if you just plugged up the one air hose where is that exhaust going to go when the PAIR valve opens?

Well a small amount of gas would leak up the tubes, then lock itself there. Effectively doing nothing.

All of that, means that you Moto have no idea what you're talking about. Methinks you should know what you're talking about before you trash someone else in that way.

MotoF150 · #8 Unread post by **MotoF150** » Sat Mar 17, 2007 10:13 pm

Mr Sev, ur right with most of what you said, but the exhaust gases flow back thru the PAIR valve into the air cleaner and are re-burned again to aid and lower emissions. The MAIN REASON why I installed the kit was to END my constant! backfire problem! The backfires were soooo violent that It was going to blow a hole thru my plastic air cleaner. Also my M50 looks better without that valve and that cheap plastic cover removed, but most important im very happy cause it ended my backfire problem, I never claim or notice any increase in engine performance. The kit is 2 metal cover plates, hose plugs, screws and hardware. I know everybody else that owns the same bikes have those backfires too and I wanta pass on this fix and information to help them out, plus its an added benifit that ur bike looks better with the PAIR valve removed. I also found a way of changing my FI by shorting out 2 wires at the ecu plug connector, but im not going to pass on that information cause of the risk of somebody making a mistake with the wrong wires and doing more harm to their bike.

#9 Unread post by **Wrider** » Sat Mar 17, 2007 11:29 pm

OOHHH OOHHH OOOHHHH I know this one I know this one! Yeah, my backfire problem also ended when I bypassed/removed my pair valve two weeks ago. You know what I did? I took the whole thing off, plugged the two hoses with a spent .270 casing I had laying around... Yep, that's about it, you know what it cost me? 25 cents for the round... And that was already spent... I also rejetted the carb that day with a Cobra rejet kit. That's one thing that I needed to do, and it works great now! Oh, and Moto, don't try to fight this one, I'll link all over to VolusiaRiders forums to show how it's removed and how people don't need to spend anything to plug it... And Sev, you're right on this one, hands down...
Wrider

MotoF150 · #10 Unread post by **MotoF150** » Sun Mar 18, 2007 4:57 am

Mr Wrider, my 05 M50 is a much more higher advanced bike than ur 2001.