Secondry Air Injection System.

It’s a good way of checking that doing it will make a difference, if you find it does then a more permanent solution could be in order, which doesn’t mean ripping the whole system out

 

Hi all,
All these methods will do the job you can even leave the air pump in situ under the tank with the pipework disconnected and the EML will not come on or fit the resistor,(the whole kit is available on ebay) and as smilinjack said above unscrew the air tubes next to the spark plugs and pop some blanking plugs in the holes,my reasons for removing it was changing the catalytic end cans for TORS open pipes the bike hated it popping and banging and generally running bad so I removed the entire system re-mapped the bike with tune ecu but the only thing done differently was unticked the box for the SAI no EML light as its now turned off,

 

You can also reset the light with tune ecu

 

The SAI pulls a fresh charge of air into the hot exhaust port to burn off residual unburnt fuel and improve tail pipe emissions. No air, no oxygen, no ignition.

 

Im not entirely sure if you block one end of it there would be no airflow the pump will still be running like

 

Best to bin the whole lot - you'll never put it back on once it's been disconnected.

 

It will be fine as long as you’ve got a good seal on the end of the pipe and the hole in the airbox. My brother ran his America like that for months with no problem

 

Mine were blue before junking it and are still blue traditional triumph look id say I read somewhere that this system was fitted along with the cats to comply with emissions however in the uk at least the bikes dont get probed for emissions only visual neither have my loud pipes ever been a problem

 

Firstly any regs change will not be retrospective. They never are.

Bluing and temperature: the very absence of a secondary burn is why the header is made cooler. The bluing won’t disappear on its own but you won’t have the same degree of popping on the overrun.

 

Take it off transforms the bike with better low down running

 

Hi Rudeboy, first thing to understand that is fitted to the Bonny does not have a pump of any kind. The AI system operates by the ECU sending signals to a solenoid operated valve at 0 - 6% throttle opening. This allows a small additional port aft of the exhaust vale to suck air through pipes leading to the airbox.

The effect of this is to inject air (ie oxygen) into the very hot exhaust stream where it ignites any unburnt fuel (the popping). This occurs BEFORE the O² sensor and that's important to understand when contemplating any modifications.

 

Think there's a thread on here about putting a large ball bearing in the pipe to block it off

 

I took mine off did the air air box mod and with one tooth up on the front she'll do 100 mph in fourth
And a tune ecu remap of course

 

Hi big

Hi Big Lad not sure if we are on about older or newer machines here but when i referred to the pump i meant the small valve under the tank which when i disconnected all the pipes from and left in situ i could hear running very quietly sorry if ive said its a pump and not a solenoid or valve but agreed on what you stated above modded my 10 plate bonny and 16 plate thruxton by removing this purely to eliminate the popping on the overrun i guess its richened it up now

 

I have an 09 America , I have done the full SAI removal ! Did it in stages ! First stage ball bearing blocking the said intake , on America this pipe is located mid airbox on the left front pane as you look @ it front the seat. All good , popping reduced , no extra action required ! I went full removal for aesthetics/look's ! Then went even deeper for tuning ! Did internal air box work (removed barrier) put new hi flow air filter in and short open foran mufflers , dyno tune $460 went from 51 rear wheel HP to 57.7 rw HP and torque improved 4ft/lbs , used tuneecu to reset tables and turn said off in ecu (no mil) went further three yes ago !! Full 905 cc big bore kit with hi compression pistons , did port and polish on cylinder head , nearly 20 HP. Paid $500 for another dyno tune session now pumps out 75/80 HP . With a new one tooth smaller front sprocket it is faster off the mark by far than my tuned 98 sprint !!
You can blank off the cylinder head said exhaust ports with car sump plugs ! They are same thread and size !
It's up to you how much and how deep you wish to go ! $$$ or not ! Cost nothing for a ball bearing !

cheers capt

 

Just to drive the nail out of sight......

Bunging the hose will:

Cool the header exhaust
Reduce popping

It will NOT make too much difference to throttle snatchiness. This is caused by the lambda sensor in an efi engine switching from closed to open loop as you come off idle and changing the air fuel ratio setting in the ECU. To achieve smoother running the sensor needs removing/isolating. In standard form the sensor does, of course, detect the effects of a functioning SAI system and your Efi is necessarily set up for emissions regs rather than totally smooth operation.