What does the AIS do to affect performance?
Posted March 20, 2006 - 05:52 PM
Posted March 20, 2006 - 06:16 PM
Posted March 20, 2006 - 06:24 PM
Posted March 20, 2006 - 07:52 PM
Posted March 20, 2006 - 07:59 PM
I doesn't affect the performance at all. Removing it cleans up the appearance a little and makes servicing a lttle easier but mostly it stops the popping on decel.
Exactly as Dan says. This simple valve uses manifold vacuum to meter the amount of fresh air via the air box to be pulled into the exhaust stream. This help in cleaning up the unburned hydrocarbons. We have assumed that this fresh/cold air is what causes the popping on de-cell. Remove it and all you have really done is lost a pound of weight. I doubt anyone can attribute the AIS to any sort of performance gain or lose.
Posted March 21, 2006 - 10:06 AM
Posted March 21, 2006 - 11:50 AM
Posted March 21, 2006 - 12:18 PM
Also, removing it is a nice little slap in the face of all the enviro-nazis at CARB who demanded it because dirt bikes are BAD ...SC
What I've noticed too is that after removing of the AIS you can reach faster the lower RPM which is good for those who prefere engine braking
Posted March 21, 2006 - 06:54 PM
The Tuning fork company RECOMMEND removing it for "closed course use" - that means "BIN IT"
As stated above: without AIS; easier to service, looks better, helps relieve decel pop, makes fine tuning the jetting easier < more transparent> , saves weight...any more reasons? More performance is not the primary motivator like lots of other easier mods!!
IMHO I think the Run-on is probably more due to the ACV interference which affects the pilot circuit jetting - another story though.
Posted March 22, 2006 - 07:21 PM
Posted March 22, 2006 - 07:55 PM
Posted March 23, 2006 - 03:04 AM