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Full delete of PAIR valve.
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kmoney Offline
High Mileage

Vancouver, BC
Posts: 908
Joined: Sep 2014
Post: #1
Full delete of PAIR valve.
When doing my valves today, I decided to do a full delete of my PAIR valve. I personally always didn't like the cluster of hoses at the front of the engine and would catch them out of the corner of my eye all the time.

The full delete is pretty simple. You just need to remove the gas tank. Remove all the PAIR hoses and cover all three hose inlets with Bypass Caps. I removed the valve itself and planned on plugging the connector with a resistor; however, just leaving it disconnected hasn't thrown a code yet so...

İmage

İmage
(This post was last modified: 05-26-2016 10:39 PM by kmoney.)
05-26-2016 10:38 PM
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EarsOnWheels Offline
Running Like a Top

DC
Posts: 305
Joined: Jul 2015
Post: #2
RE: Full delete of PAIR valve.
What is the purpose of the PAIR valve? Any risk to removing? Is the delete just for visual effect?
05-27-2016 05:42 AM
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kennyw Offline
High Mileage

Gold Bar
Posts: 1,117
Joined: May 2015
Post: #3
RE: Full delete of PAIR valve.
The purpose is to inject clean air into the exhaust to promote burning of any fuel that didn't burn in the combustion chamber. This reduces emissions.
05-27-2016 06:23 AM
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popgun Offline
Lives On Two Wheels

Virginia Beach
Posts: 6,223
Joined: Apr 2013
Post: #4
RE: Full delete of PAIR valve.
EOW, the reason most people do the pair valve mod is to stop the popping they hear when they change to an aftermarket exhaust.

Here is the original pair valve mod how to : http://cb1100forum.com/forum/showthread.php?tid=1824

If you come to a fork in the road, take it!
2013 CB1100
2012 ST1300
(This post was last modified: 05-27-2016 07:28 AM by popgun.)
05-27-2016 07:28 AM
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kmoney Offline
High Mileage

Vancouver, BC
Posts: 908
Joined: Sep 2014
Post: #5
RE: Full delete of PAIR valve.
Yes. I should have mentioned that. I have a full exhaust that popped on decel until I did the original PAIR mod. This just completes it more.
05-27-2016 08:59 AM
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R748 Offline
1st Service Completed

'Straylia
Posts: 65
Joined: May 2017
Post: #6
RE: Full delete of PAIR valve.
Just like to add a few details to help others who may be keen:

1. I confirm that my (frankly embarrassing) popping on decel with the 4-4 system has now almost gone.
2. You will need 2 x 13mm (half inch) blanking caps (also known as radiator caps). This is the entire cost of the job Smile
3. There are 3 hoses as noted above. All of them pull off by hand and a pair of pliers is helpful.
4. The front 2 hoses attach to the pair valve and engine.
5. The third longer hose attaches to the airbox. You will need to take off the right hand side panel, remove airbox cover, remove airfilter and stick your hand in the hole. Just up on the right you'll feel the round hole which connects to the hose. I blanked this off with some rubber and high-temp silicon. I suppose tape or a rubber plug would be just as good.
6. I didn't remove the tank however, I did raise it at the front and insert a rolled up towel to keep it in position. I used a small strap over the tank to secure it "just in case".
7. I also removed the valve and simply cable-tied the connector up under the tank with a bit of electrical tape over the end of it.

Beers !
(This post was last modified: 07-09-2017 03:57 PM by R748.)
07-09-2017 03:54 PM
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beardyweirdy@me.com Offline
Running Like a Top

London
Posts: 272
Joined: Aug 2014
Post: #7
RE: Full delete of PAIR valve.
Thanks Kmoney and R748,
Just checking Valve clearances and thought why have I still got this thing on after blocking it off ages ago. Really didn't want to put it back on but thought It would be a can of worms with throwing codes etc... Apparently not ;-)

Love this forum!
02-10-2018 04:46 AM
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Luge Offline
Break-In Period

Spring Hill, TN. USA
Posts: 19
Joined: Mar 2018
Post: #8
RE: Full delete of PAIR valve.
(05-26-2016 10:38 PM)kmoney Wrote:  When doing my valves today, I decided to do a full delete of my PAIR valve. I personally always didn't like the cluster of hoses at the front of the engine and would catch them out of the corner of my eye all the time.

The full delete is pretty simple. You just need to remove the gas tank. Remove all the PAIR hoses and cover all three hose inlets with Bypass Caps. I removed the valve itself and planned on plugging the connector with a resistor; however, just leaving it disconnected hasn't thrown a code yet so...

İmage

İmage

Hello Kmoney, I know this is a old post, But I was curious if those Bypass caps are still holding up? I used some on a new Honda XR 650 R back in 2007. After a year or so, I was riding down the road and the end of the cap came out causing a very strange sound out of the single cylinder XR, I guess the heat caused the rubber cap to break down, I ended up getting a block off plate for the XR, no such plate for the CB 1100
03-29-2018 05:29 PM
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popgun Offline
Lives On Two Wheels

Virginia Beach
Posts: 6,223
Joined: Apr 2013
Post: #9
RE: Full delete of PAIR valve.
Maybe there is a plate available: https://japan.webike.net/products/23121452.html

If you come to a fork in the road, take it!
2013 CB1100
2012 ST1300
03-29-2018 06:32 PM
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Luge Offline
Break-In Period

Spring Hill, TN. USA
Posts: 19
Joined: Mar 2018
Post: #10
RE: Full delete of PAIR valve.
(03-29-2018 06:32 PM)popgun Wrote:  Maybe there is a plate available: https://japan.webike.net/products/23121452.html

Thank you very much for the link!..I was not aware of those, from the photos on the site, those plates look like they go under the existing covers, longer bolts may be needed, and the hoses are still attached for a illusion of all emission controls intact???..I think for me it will be easier to block it off at the airbox, I hate to break the seal on those covers just yet, I bought the bike new in December of 2017... Its 2014 std. I only have 88 miles on the bike, Its been a weird winter here in TN and my ride time has been limited, Yosh RSCV is on order.
03-29-2018 07:14 PM
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