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a while back there was a post on how to remove the ais but i cant seem to find it. was it by chance pre crash and never posted again? does anyone know where it is or who posted it? any help will be greatly appreciated. thanks mike
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I was googling something else and came accross this article. I don't know anything about AIS, but with everyone talking about the RSV chirping, I thought this might be interesting... AIS, What's chirping? Written by StarMyram, on 06-22-2006 19:16 I used to have an 04 V-Star 650 Classic and it made a funny noise while coasting on highway and cruising in town at low rpm. Just got a brand new 05 Roadstar Silverado ...Ya know, this bike is beautiful, torquey, and a nice low "bump,bump,bump" exhaust tone at low rpm. But for crying out loud, WHAT is this annoying chirpy sound?! This bike has it even worse than the V-star! Well, the other night I was fumbling around the running engine with my fingers and eneded up with my finger in the air intake tube hanging down off the AIS pump. The chirping stopped! HA! Found thee source of the noise! Did some research as to where these little pipes went to and fro on the AIS. I decided I could do without the peice of crap on my bike. (don't tell Kyoto! ) I got out my tools and removed the AIS pump and it's filter and all the brackets. Removed the vaccuum pulse line from the intake manifold and put a cap on the tee. I left the chrome tubes attatched to the heads, I used the one left over hose (pushed a 1" long wooden dowel into the hose to seal it off to avoid exhaust gas travelling from one cylinder port to the other through the chrome lines and burning up the hose) and installed the hose to each chrome line. After admiring the new clean, uncluttered look of the front of the engine without AIS, I started the engine and admired the clean V-twin engine sound, with a nice clean exhaust tone with no "fluffing" from the tailpipes (the way it should be.) I took the bike for a ride and Voila! No more chirping sound! Yeah Baby! I understand Californians have emmission laws and lots more tubing on the bikes for charcoal canisters and such so I don't know about thse bikes. Removal of the AIS system is not necessary for performance gains since the AIS does not rob power or performance. But it's just plain ugly to look at, and it annoyed me to no end because of the crappy sound it adds to the engine. Here in Alberta, I can get rid of it without some emmissions police hassling me too. I plan to make steel plates to cover the ports in the heads and remove the chrome tubes completely when I get time this coming winter.
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What is the AIS system, and what does it do?
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Plugging the AIS System The AIS is an emissions system which introduces oxygen-bearing air into the exhaust ports on the exhaust stroke. This induces further combustion of hydrocarbons in the exhaust pipe and greatly reduces emissions. It is driven by intake vacuum pulses. The only purpose of this system is to help satisfy our good old EPA requirements. Though good in theory, it's bad in that under certain conditions it can cause a HUGE backfire on deceleration that actually sounds like a shotgun going off. The first time this happened to me, I thought we were being shot at and my wife almost jumped off the bike. Disabling the AIS is a simple process and one that will not affect the performance of your bike in any way. The following is one way of doing so. There are two assemblies that you have to deal with. One on the rear and one on the front. We'll start with the rear and it is very easy. On the right side of the bike, just below the rear shock, you will find the first one. You'll want to disconnect the large hose with the gold clamp. Now..you can use most anything to plug the hose. I used rubber stoppers that I had picked up at a local Home Depot store. You can find these in the hardware department but a wooden dowel rod or most anything of the proper size will work fine. Look carefully and you can see that I have stuck the rubber stopper into the inlet on the AIS valve. Now in this next picture, I've simply stuck a piece of duct tape over the end of the valve and stopper. You can probably skip this step if you want but being born and raised in Texas...it's just part of my upbringing. Any job worth doing is worth using a bit of duct tape on. Besides...it keeps the plug where I want it and not up in the hose somewhere. Now you put the hose back on and you are done with the rear. That wasn't so bad was it? Don't worry...though essentially the same process, the front will give you plenty of grief simply because it's harder to get to. Now the front AIS valve is located just in front of the oil filter. The attached blurry picture is a bit hard to see but you can see the gold clamp that secures the hose you'll need to remove. Now....there are two ways to do this to make it a bit easier. The first way would be to do it when you do an oil change. With the filter removed, you can pretty much forget the rest of this write-up. Simply disconnect the hose as you did on the rear, insert the rubber plug, add the duct tape, reconnect the hose and you are done. If you are ready to do this and you are not ready for an oil change, here is a tip that will make it easier. Just below the drivers floorboard on the left side of the bike (shifter side), you will see two allen bolts. These are the bolts that secure the AIS assembly in place. Remove those two bolts and the assembly will be free, held only by the hose that you will disconnect. You can now pull down on the assembly enough to get to the clamp without skinning your knuckles. Once the hose is off, the assembly just drops out. Now...just plug this hole in the assembly as you did on the rear. Put it all back together and you are done. Not a difficult job at all. Figure about 30 to 45 minutes total.
