AIS (Air Injection System) Removal.
Note: this guide is provided with no guarantees of any kind. If you decide to modify your motorcycle based on this article you assume the whole responsibility of your actions.

Here are the almost-step-by-step instructions on how to remove the ugly collection of pipes and valves that turn your non stock pipes blue and makes the popping and banging backfiring that also occurs with non stock pipes (it happens with stock pipes too it's just that you cant hear it).

The idea is as the bike goes into deceleration the vacuum opens a valve that injects air into the exhaust manifold thereby reigniting the unburnt gasses, these continue to burn as they make their way to the outside world (hence the blueing of your nice new pipes),. This can burn slow causing more heat in you exhaust or fast causing an explosion (backfiring). All this for a country that try's to stop a little motorbike expelling a few hydrocarbons into the air when they are dumping tons of it from their industry, Opps nearly fell of my soap box.

To see a high-resolution (1024x768) picture of each stage just click on the thumbnail (it will open another browser window).
The standard setup of the A.I.S. (marked red). This picture also shows the Charcoal canister (marked blue) fitted to a Californian bike.
The rear cylinder spigot with pipe attached.
The front cylinder spigot with pipe attached. You can just see the small vacuum pipe behind the spigot this has to be blanked off with the Barons plug if you have bought the kit. I removed the pipe right back to the manifold and use a self tapping screw with some gasket sealer and screwed it directly into the manifold.
The valve located to the front of the bike. You have to remove the screws of the rectifier in order to remove the screws that hold the A.I.S. valve. Be aware that the A.I.S. valve screws were extremely tight. So much so that it's been impossible to remove them with a normal Phillips screwdriver. I used pair of grips on the head of the screw and others have used a cold cutting chisel to remove them, the Phillips screwdriver will just twist in the screw and render them useless for replacement.
The front metal pipe removed ready to knock out the spigot. Again you can see more clearly the vacuum pipe actually connecting to the valve.
The rear metal pipe is also removed ready.
A long wide blade screwdriver was used to knock out the rear spigot. The fittings will bend and absorb the impact of the blow until the screwdriver gets deep into them. At that point, with the blade firmly set inside the tube, and with a good angle, the fitting will remove easily. I also tapped the fitting sideways to rotate it to a better angle.
The same with the front. I actually used a slide hammer which is a heavy weight that slides along a shaft that has a hook fitted to the end. This hooks around the spigot and with a few good whacks they came out without any trouble . In fact they were in such good condition they could be replaced, and were as I cut the angle pipe off and brazed a blank on the end.
The cylinder with the spigot removed.
The offending beastie.
What the A.I.S. looks like removed from the bike.
Blanking plugs as supplied by Barons. A drift to bang them in with, two blanks for the cylinders and the small black one that blanks off the vacuum pipe that goes to the manifold.
Knocking in the plugs using the drift.
Front done
And rear
How it looks afterwards.
Now
And before
I cannot take the credit for the pictures on this modification as they were used from two other sites a French site and the other from the States .