+- The CB1100 Community Forum (https://cb1100forum.net/forum)
+-- Forum: Honda CB1100 Discussions (https://cb1100forum.net/forum/forumdisplay.php?fid=5)
+--- Forum: Mechanical & Technical (https://cb1100forum.net/forum/forumdisplay.php?fid=7)
+--- Thread: PAIR Valve (/showthread.php?tid=5607)
PAIR Valve - HondaJon_imp - 11-27-2013
First, let me give props to Deanohh for enlightening me on how the PAIR valve functions and exactly what it does. If you have added a slip on (Staintune) and are tired of the popping on decleration, read on....
Pull the right side cover and remove your air filter, Inside the airbox up, front and to the right of the opening, is the singular hole that the PAIR valve sucks air from. All you have to do is insert a rubber plug into this hole and presto, no air to inject into the exhaust ports and no more deceleration popping. Remove this plug when you want to return your PAIR system to normal function.
You can also look on page 5-66 of the factory service manual, or at this exploded view, to confirm that the hole is the only point of air entry.
http://www.motosport.com/motorcycle/oem-parts/HONDA/2013/CB1100/AIR-INJECTION-CONTROL-VALVE
PAIR Valve - kenfyoozed_imp - 11-27-2013
So exactly was does this PAIR valve do? Is the popping a bad thing?
Sent from my iPhone using [url=http://tapatalk.com/m?id=1]Tapatalk
RE: PAIR Valve - Deanohh_imp - 11-27-2013
As a pollution control method, the ecu opens the valve at certain times to allow fresh air to be drawn through the reed valves into the exhaust to provide extra air to complete combustion of gasses that have incompletely burned inside the engine. The popping was always there but you start to hear it with a louder exhaust. Its harmless but some guys don't like it..... Some do.
RE: PAIR Valve - Guth_imp - 11-27-2013
I'll add my thanks to Deanohh as well for bringing forward his knowledge about the PAIR valve to the forum. While I haven't touched mine, I always appreciate learning more about what makes my bike tick.
RE: PAIR Valve - HikerToo_imp - 11-27-2013
I've been complaining about my Staintune doing this since I got, if it warms around here I may give this a try, thanks!
http://cb1100forum.com/forum/showthread.php?tid=1113
RE: PAIR Valve - _imp - 11-27-2013
(11-27-2013, 11:32 AM)Deanohh_imp Wrote: As a pollution control method, the ecu opens the valve at certain times to allow fresh air to be drawn through the reed valves into the exhaust to provide extra air to complete combustion of gasses that have incompletely burned inside the engine. The popping was always there but you start to hear it with a louder exhaust. Its harmless but some guys don't like it..... Some do.
As long as the popping isn't Backfiring.Where too low an
Octane is used.
Because incorrect mapping for aftermarket exhaust can cause
strange sounds like backfiring or popping.
Running lean would cause it.
Running rich would probably cause the engine to stall or
not turn over.
(11-27-2013, 11:44 AM)Guth_imp Wrote: I'll add my thanks to Deanohh as well for bringing forward his knowledge about the PAIR valve to the forum. While I haven't touched mine, I always appreciate learning more about what makes my bike tick.
I heard that Honda was considering adding a couple
extra pages to their 128 pg. Honda Owners manuel.
On What makes your Honda Tick.
But the engineers decided agin it.
They weren't about to give away any trade secrets.
Since every model is so precious.Like a newborn baby is what.
RE: PAIR Valve - ingobohn_imp - 11-27-2013
(11-27-2013, 11:32 AM)Deanohh_imp Wrote: As a pollution control method, the ecu opens the valve at certain times to allow fresh air to be drawn through the reed valves into the exhaust to provide extra air to complete combustion of gasses that have incompletely burned inside the engine. The popping was always there but you start to hear it with a louder exhaust. Its harmless but some guys don't like it..... Some do.I like the deceleration popping sound.
(My old Transalp had it even stronger - I liked that too.)
RE: PAIR Valve - _imp - 11-27-2013
Could just be thqt when you changed out the new exhaust
you didn't replace the gasket or crush gasket off the header.
So a slight leak is letting air in/out.You can re-use the oem
gasket but it may be hard to get unstuck.
RE: PAIR Valve - HondaJon_imp - 11-28-2013
Popping on decel has always been indicative of a lean condition or exhaust leak. The PAIR system, in essence, creates just this by injecting unnecessary air into the combustion chamber. I really noticed it with the Staintune and stock header, but I could never find a leak. Deanohh's explanation solved the mystery.
RE: PAIR Valve - _imp - 11-28-2013
(11-28-2013, 12:54 AM)HondaJon_imp Wrote: Popping on decel has always been indicative of a lean condition or exhaust leak. The PAIR system, in essence, creates just this by injecting unnecessary air into the combustion chamber. I really noticed it with the Staintune and stock header, but I could never find a leak. Deanohh's explanation solved the mystery.
A common problem when changing out to aftermarket
exhaust is the gasket.Sometimes you can't use the old
gasket.I had that problem with the cobra 6-into 6
pipes for my Valkyrie Tourer.The Tourer was a 6-into-2
OEM exhaust and one crush gasket was fine and the other
wasn't.So my Dealer was lucky and managed to get shipped
a new set.
So If the crush gasket is the villain,then other fixes won't
compensate for.