does a 950 need the AIS plugged? removed? - Star Motorcycle Forums: Star Raider, V-Max, V-Star, Road-Star Forum
 
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post #1 of 10 (permalink) Old 12-08-2010, 09:30 PM Thread Starter
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does a 950 need the AIS plugged? removed?

http://www.sloneservices.com/SilverB...FAQ-05.htm#AIS

that is for a different engine (carbed?)

In another thread, someone told me to remove the AIS from my 950.

a search for AIS does not bring any 950 specific threads to light.

??


https://www.starbikeforums.com/forums...lug+ais&page=2



https://www.starbikeforums.com/forums...5840#post15840
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post #2 of 10 (permalink) Old 12-08-2010, 10:15 PM
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Ais

I don't think the newer injected bikes have an AIS. I know my Liner does not.

If it is popping you are concerned about I believe most work on fuel air mixture with a controller. I have never worried about it.

For the Liners there is a CO mod that can be done to richen up the fuel air. Don't know if the same can be done for the 950 or not. Here is a link for the Liner mod to give you an idea of what to look for.

http://www.linerwiki.com/index.php?title=CO-Mod

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post #3 of 10 (permalink) Old 12-08-2010, 10:26 PM
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Actually its a bit confusing since the Yamaha proper site does not mention it BUT the generic dealer sites most dealers use do say it does. Odd - need someone that has one to chime in...

Yamaha's site: http://www.starmotorcycles.com/star/.../features.aspx

Dealer site builder generic page (all the dealers will be the same): http://www.schauerpower.com/new_vehi...50593&CatDesc=

Confusing
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post #4 of 10 (permalink) Old 12-09-2010, 06:56 AM
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no AIS on the 950 since it is electronic fuel injected and not carbureted
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post #5 of 10 (permalink) Old 12-09-2010, 01:56 PM
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Quote:
Originally Posted by bevo1981 View Post
no AIS on the 950 since it is electronic fuel injected and not carbureted
Since you own one I'm sure you are correct on the 950 but the second part of the statement is problematic.

Just because the bike is FI it does not mean it does not have AIS. The Warrior and VMax both have AIS. Every current big 4 sport bike has AIS, I most of the standards as well (I don't really know much about other cruisers). All current Triumph sport/standards do as well.
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post #6 of 10 (permalink) Old 12-14-2010, 07:08 PM
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It does not have AIS. It uses the o2 sensor and the Cat for emissions, instead of injecting air.
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post #7 of 10 (permalink) Old 12-14-2010, 07:36 PM
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Quote:
Originally Posted by GaryTJ View Post
It does not have AIS. It uses the o2 sensor and the Cat for emissions, instead of injecting air.
Also a problematic statement. AIS is a system mostly built to pass EPA start up requirements. All engines run rich on start up and in pretty much all in open-loop (O2). As such the narrow band 02 on the bike has nothing to do with it.
AIS "injects" air into the exhaust to help burn leftover fuel on start up, bring the cats up to operating temps and aid normal cat operation efficiency thereafter.
It would be interesting to see how this is done on bikes without AIS but it almost certainly has nothing to do with the O2 sensor - even if just for the simple fact that most of the bikes that have AIS also have O2 sensors and cats (and narrow band sensors).
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post #8 of 10 (permalink) Old 12-14-2010, 07:54 PM
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The o2 is heated so it stays in open loop only for a very short period.

But, making it simple, in answer to the original question, it does not have AIS and therefor it cannot be removed.
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post #9 of 10 (permalink) Old 12-14-2010, 08:11 PM
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A heated O2 sensor would certainly help.
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post #10 of 10 (permalink) Old 12-17-2010, 12:19 PM
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"Open Loop" is problematic for the new 950 which has "Closed Loop" FI control. Open loop no longer meets EPA standards and the brief startup cycle is not the issue as much as the regular run cycles of operation. AIS would give the O2 sensor a false parameter which would alter the computers regulation of fuel.
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