PAIR VALVE BLANK OFF PLATES

Larry_M

Supercharged
Joined
Apr 16, 2020
Messages
257
Ride
2019 Triumph 1200 Scrambler XC, 2020 Rocket 3 R
What happens if you only disable the PAIR valves? Does the AFR go out the window? I'd imagine it would run less lean/better?
 

RICHARD ALBANS

.040 Over
Joined
Nov 13, 2010
Messages
84
Ride
ROCKET 3 CLASSIC
What happens if you only disable the PAIR valves? Does the AFR go out the window? I'd imagine it would run less lean/better?
No air would be sucked in on overrun or idle or cruise. The Lambda sensor is live so it will correct normal running.
 

Larry_M

Supercharged
Joined
Apr 16, 2020
Messages
257
Ride
2019 Triumph 1200 Scrambler XC, 2020 Rocket 3 R
Just curious as i owned Kawasaki Vulcan where the previous owner had removed the PAIR plumbing. He did nothing else and claimed it ran better and stopped making gunfight at OK corrall-impressions on deceleration. (I can of course only attest to the latter since i never drove it with PAIR plumbing intact.)
 

RICHARD ALBANS

.040 Over
Joined
Nov 13, 2010
Messages
84
Ride
ROCKET 3 CLASSIC
Just curious as i owned Kawasaki Vulcan where the previous owner had removed the PAIR plumbing. He did nothing else and claimed it ran better and stopped making gunfight at OK corrall-impressions on deceleration. (I can of course only attest to the latter since i never drove it with PAIR plumbing intact.)
[/QUOTE
Exactly stop the popping on over run. My R3 in standard form popped on over run it was muffled by the silencer but was there. With my open pipe its annoyingly loud, this should stop it. So anyone fitting a loud pipe will have the same issue.
 

warp9.9

Pocałuj mnie w dupę
Joined
Jun 10, 2007
Messages
10,876
Location
Forest City Illinois
Ride
07 Rocket
Pulsed air induction reed valves. They feed air into the exhaust near the exhaust ports to burn off any remaining unburnt fuel mixture.

And burble on over-run, just like a leaking exhaust.

Bloody emission controls................
A a form of Secondary Air Injectoin like the sptints has. Just speculating!
 

leatal

Turbocharged
Joined
Mar 11, 2015
Messages
614
Location
Dothan, Alabama
Ride
2014 Roadster
Does the pair system pull air from the cam area inside the cover? If so, won't blocking the outlet cause over pressurizing the engine? Just me thinking as the system reminds me of the early 70's-80's V8 engines had an air pump to pump air into the exhaust.
 

RICHARD ALBANS

.040 Over
Joined
Nov 13, 2010
Messages
84
Ride
ROCKET 3 CLASSIC
Does the pair system pull air from the cam area inside the cover? If so, won't blocking the outlet cause over pressurizing the engine? Just me thinking as the system reminds me of the early 70's-80's V8 engines had an air pump to pump air into the exhaust.
No it pulls it from outside.
 
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