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2013 Air box plug - had anyone removed?
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lagoje Offline
1st Service Completed

Arizona
Posts: 80
Joined: Oct 2013
Post: #1
2013 Air box plug - had anyone removed?
Just wondering if anyone has popped this plug out to get more air? And why it's there?

It appears to have some sort of sealant around it but it's a rubber plug and comes off easy enough.
   

İmage



Sent from my Commodore 64 using Tapatalk

-Lago

13 CB1100AD (For Sale)
12 Yamaha Zuma 125
11 Kawasaki KLR 650
78 CB400 Hawk [i](my first, but no longer with me)[/i]
(This post was last modified: 12-21-2014 03:14 PM by lagoje.)
12-21-2014 03:08 PM
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ksmith0034 Offline
Break-In Period

Columbus, OH
Posts: 19
Joined: Feb 2016
Post: #2
RE: 2013 Air box plug - had anyone removed?
I guess no one else has done this, so what we're your findings?
02-03-2016 02:21 PM
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kmoney Offline
High Mileage

Vancouver, BC
Posts: 908
Joined: Sep 2014
Post: #3
2013 Air box plug - had anyone removed?
I think that hole is the fresh air supply for the PAIR valve, which is factory deleted on North American bikes.

İmage
02-03-2016 02:34 PM
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CB4ME Offline
Road Warrior

Maryland
Posts: 2,051
Joined: May 2013
Post: #4
RE: 2013 Air box plug - had anyone removed?
Some of us have taken the whole thing off and installed a part made by TSR to hold the air filter in place. ($100 TSR air intake funnel).

I think the air box snorkel removable makes a slightly noticeable difference but there's a downstream bottleneck - namely the 25mm intake to the throttle bodies - that restrict the amount of air into the engine. So the difference is not significant.

[size=xx-small]Accessories by: Agras, BabyFace, Chic Design, Daytona, Endurance, Force Design, Honda, K&H, K&N, Magic Racing, MotoGear, Moriwaki, Ohlins, PBI Sprockets, Posh, Power Commander, Ryujin, SP Takegawa, SP Tadao, SW Motech, TSR, U-Kanaya, WM, XAM Sprockets [/size]
02-03-2016 02:38 PM
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Inhouse Bob Offline
Road Warrior

NoVA
Posts: 1,955
Joined: Jun 2015
Post: #5
RE: 2013 Air box plug - had anyone removed?
I thought it was there so that while you are changing the oil, you could change the air, too. I'll need to ask my dealer BananaBanana
02-03-2016 03:18 PM
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Gumby 1100 Offline
Running Like a Top

Cambridge, Ontario, Canada
Posts: 489
Joined: May 2014
Post: #6
RE: 2013 Air box plug - had anyone removed?
(02-03-2016 02:34 PM)kmoney Wrote:  I think that hole is the fresh air supply for the PAIR valve, which is factory deleted on North American bikes.

All CBs, regardless of destination, have a small inlet off the air box with a rubber line to provide filtered air to the PAIR Valve. This large cap is not to cover that inlet.

I'm fairly certain it is a cap to cover the hole necessary for a vacuum actuator for the Interactive Exhaust Valve Servo Motor which is not on North American CB's.

I doubt that removing this cap on North American CBs would have much affect.

2014 CB1100A (Canadian) #068 (Sold)
2018 Harley-Davidson Road King
02-04-2016 06:57 AM
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4 Paws Offline
High Mileage

MM 199 on BRP (Fancy Gap VA)
Posts: 1,154
Joined: Jun 2015
Post: #7
RE: 2013 Air box plug - had anyone removed?
Removed mine, best I could tell no change in performance. Figure easier breathing is an improvement.

Best thing I learned from my dog: “Never pass up the opportunity to go for a joy ride". Dan D.
02-09-2016 01:34 PM
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