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- Performance Modifications & Enhancements ( https://www.xt660.com/forumdisplay.php?f=52)

- - AIS Removal ( https://www.xt660.com/showthread.php?t=52)

I done this today , and its better smoth on riding :066:

thanks !

I wish I knew what you guys talking abt, I mean I know where it is and stuff but yamaha put it there for a reason disconnecting it would be I dont know... trast yamaha!! Hahaha:sad3:

Quote:

Originally Posted by gedeons (Post 119700)

I wish I knew what you guys talking abt, I mean I know where it is and stuff but yamaha put it there for a reason disconnecting it would be I dont know... trast yamaha!! Hahaha:sad3:

AIS is Air Intake System it is used for emission control. It has no effect on the bike when blocked off if you are running after market cans, it might not be good for the environment when disconnected.

Hi there from Finland!

I bought a 660x -06 and it has Leo�s, Powercommander and a "airpowerfilter".

I read this topic and checked My bike and saw that then connector of AIS in not connected. I did not see that the pipe to the airbox is blocked.
One of the previus owners had wrote to the ownermanual that the CO-level is raised from 90 to 110.
If the connector was off at dyno but not blocked from the airbox the bike is running on rich mixture now because the CO measurement wasnt correct?

I�m a little bit confused about shouldt the connector be off or on?
I dont mine if the bike makes popping sound only that it would work as it should.

Thanks for Your oppinion.

Quote:

Originally Posted by Rubu (Post 125109)

If the electrical connector is disconnected from the AIS valve the valve will remain open & cause the motor to pop all the time.

On a 06 motor there is only a small improvement when blocking the AIS off as this ECU has twin spark, from 07 on wards you have a single spark ignition system & about an 95% improvement in reducing the popping back when the AIS is blocked off.

Okay, I�ll block the hose if there is some difference to better performance.

What do You think about the fuelmixture?
Could it be wrong because the hose isnt blocked and the powercommander has been adjusted the hose open?

Quote:

Originally Posted by Rubu (Post 125126)

The only time the AIS will effect a Power Commander is when you are building a fuel map on the dyno.

Quote:

Originally Posted by Kev (Post 125163)

The only time the AIS will effect a Power Commander is when you are building a fuel map on the dyno.

If the valve was open when the fuelmap was made, My map is too rich?

Quote:

Originally Posted by Rubu (Post 125223)

If the valve was open when the fuelmap was made, My map is too rich?

Correct.

Blocked the hose from the airbox to AIS and the hole to airbox.

I must say in My case bike runs much better in low rpm and throttle.

I�m taking the bike for dyno 4.5.2010 so then well see is the fuelmap ok and how much does it pull...:Driving_6XFY3G: