Erik, I hate to Tell you this, BUT that picture is 100% WRONG!!!!!!!!!!!!!!!
That is a fuel screw!!!!
Just to make sure we are talking about the same thing. Polaris, in their factory service manual, calls this air screw a "pilot mixture screw"!! This is what is circled in the picture!!!!!!!!!!!!!!!
It is dis-information like this that really messes up people!!
There is a reason why the mfg puts the "fuel screw" behind a brass plug/cover, and that is that most back yard tuners have no clue as to how to tune it the right way, and if tuned wrong the WHOLE carb setting is thrown off.
There is a larger issue also and that is trying to meet the government emissions requirements. But that is a whole different topic.
If the question is , Can a person get better performance by adjusting the fuel screw for "his/her" riding area and riding style?? Then the answer is YES 100% YES.
But you HAVE to have the knowledge as to what you are turning/ tuning before you start!
For your information there is NOT any "air screw" on the 2003 Polaris predator stock factory carb!!
While there are air jets that can be changed, note these air jets are fine and don't need be messed with, there is not any kind of adjustable air screw any where on the carb.!!!!!!!!!!!!!
CJ in your posts, you have posted that the screw we are talking about is both a fuel/pilot mixture screw and that it is also an air screw.
Member No. 255
Registered: 05 Apr 03
From: Richmond, Virginia
We're talking about the pilot mixture screw right? And it's a fuel adjustment not air. It's located near the back and if you turn it out you will add more fuel. Stock is 2.5 turns out, It's where I have mine and it works great.
This post was edited by CJ on 20 Oct 03 9:26 AM . "
I am not trying to bash anyone just to make sure we are all talking about the same thing!!!
2003 Polaris Predator / 2004 KTM 525 exc 6 speed motor.
570 Thumper Racing kit w/ 12.5 - 1 CP piston.
Head ported by Thumper Racing w/ new intake seats done by Pro-1 racing.
Stage 5 cam ( Custom design by Thumper Racing )
AC bearing mod.
Oil system mod by DJH.
KW valves ( stock size )
* #100 CDI dirt bike CDI.
42 mm FCR carb by Walt/ Fast64ranchero. ( SX carb = No TPS )
Trail Tech -10 oz flywheel. ( Stock is 30 oz/ trail tech = 21 ozs )
Mino water pump. Full flow set up, no T-stat.
PB Oil cooler.
Custom modded intake. Uni filter/ D2 moto adapter on a modded Predator intake tube.
KTM dirt bike header connected to a modded PP/ White broes muffler w/ turn down tip.
( Soon to have a KTM Bill modded CT racing full exhaust system. )
Tusk Clutch kit.
Honda thumb throttle.