AIS Bypass on 2009 venture

[dale4772]

I know everyone does it in Tennessee cause no emission test are required.

Anyone know the pros and cons of bypassing the AIS system?

And how do i do it?

 

Thanks

Dale4772:fingers-crossed-emo

[Freebird]

Here is the "how to" part.

 

http://www.venturerider.org/forum/showthread.php?t=485

[djh3]

So pretty much this thing is like the old "smog" pumps were back in the late 60's. just an added on piece to make the emissions read what they wanted them to.

[V7Goose]

In my opinion it is a very stupid thing to do - there are numerous cons and absolutely ZERO pros. I have covered this ad nausium in many older threads, so I won't go into any further details here.

goose

[rickardracing]

If you put lower restriction pipes on your bike and get a popping through then on decell, plugging off the AIS helps eliminate the popping. As you see, some have very adamant feelings about it.

[MikeWa]

I see no advantage to removing the AIS. Unlike some of the old air pumps on automobiles it takes zero power to operate. It does in fact reduce emissions with no adverse affect on the bike. The added weight is insignificant. So if you can help the atmosphere, required or not, at no cost to you why not do it. If you are getting excessive popping in the exhaust something else is wrong or the AIS is broken. An overly rich fuel mixture or exhaust leak are likely culprits.

 

The AIS is simply a siphon that siphons air into the exhaust. The engines exhaust is already hot and has unburned fuel in it. Given a little oxygen this wasted fuel HC & CO will burn in the exhaust pipe rather than pollute our atmosphere. The AIS valve is a simple vacuum operated valve that controls the amount and timing of the air entering the exhaust. It shuts the airflow off during deceleration, high vacuum. It also prevents exhaust from pushing back up into the air filter.

 

Mike

[IronMike]

Think I might need a new AIS valve. Mine most likely clogged with oil. How hard is it to get to?

[V7Goose]

Think I might need a new AIS valve. Mine most likely clogged with oil. How hard is it to get to?

Very VERY unlikely. You would actually have to submerge the lower part of your bike in a pool of oil for that to happen!

Goose

[Carbon_One]

On my 05 I would get some popping on deceleration sometimes. After resetting the floats and bumping the pilot jets up one size it no longer did any popping. I also had better cold weather starting with less choke. Plug readings after the change still left a nice brown tan coloring on the spark plugs. I was using K&N filters as well so that may have influenced stuff too.

Larry