If like me there are other people who don't know what a PAIR valve is or why you would want to block it off i did a little looking around and compiled a few different posts from different sites that tell you what it is why ou may want to block it off and instructions on how to do it on your 10
The pair valve is a valve designed to allow air from the airbox into the exhaust for emissions. Remember, there is zero performance gain with this mod.
one reason for this mod is to stop backfiring(popping) on decel with aftermarket exhausts, another is if you plan on sealing your airbox and probably the best reason is to make it practical to correctly map your A/F ratio if you have any dyno tuning performed.
Oh, and you lose about 1.5 lbs of junk and make a very crowded area on the engine somewhat less cluttered . . .
First remove the rear seat, seat mid panel, front seat, tank, air box cover, air filter, 5 bolts holding airbox onto the throttle bodies, loosen ram air tubes, turn air box 90 degrees and pull out of frame.
Once you have all of this stuff out of the way, you should of have disconnected the air tube on the front left side of the air box. You will need to plug this port with a vacuum plug. I was in a hurry on mine, used some duct tape and over laid it and then used a zip tie to secure it. This was a little overboard, but I did not have time to go to the store to get the vacuum line covers.
Follow the previous said vacuum line forward and you will see a eletrical valve that has a hose that runs between the the top pumper valves in the top of the valve cover. Pull the electrical connection loose and I taped mine up so nothing could get into it. You will not trip any codes from leaving it unhooked. Then pull the hose from each of the pumper valves and either keep this assembly or throw away.
Now there are two of these pumpers on the valve cover, one left and one right. I had to pull the coil in front of the left one to get some room and there is also a wire loom that snaps into the allen bolt on the top of the left one that will be in your way. Pull both of these pumper valves off of the bike.
Once you get them off you can either vacuum cap these also, or like one of my riding buddies did put JB WEld in them to seal them up. The reed valves in them only blow into the motor not out so there is no worry of them blowing the vacuum caps off if you go that route. You could also use a zip tie on them also to secure them, I did the tape thing again due to my time restraints as I was going to dyno my bike and did not have time to go to the store and get the caps.
place the 3 vacum caps on the respective ports and secure. Now reassemble the bike and enjoy your new found mods. You will like this when it comes time to dyno as they are suppossed to plug the KLEEN system in order to get a more accurate A/F reading, it will also cure you decel pop once you get apipe or full system.
