Polaris Riders Forum banner
1 - 3 of 3 Posts

·
Registered
Joined
·
1,103 Posts
The pilot screw is the air screw. You aren't calling the idle adj. the air screw, are you? The pilot screw is on the bottom of the carb, covered by a tamper-proof plug. It's the second, round orifice, in front of the carb bowl.
 

·
Registered
Joined
·
409 Posts
A 4 stroke carb has a fuel screw not an air screw. The circuit is after the slide on the BSR porting mainly fuel. This is an important distinction when tunning. It also has a bigger effect on fine tuning than a 2-stroke air screw. Makes sense when you think of 1 part fuel to 12-14 parts air. A fuel screw multiplies 12X the effect of an air screw. ...I keep looking for field reports of these Big Bore engines and have to pipe in on these things....Sorry!
 
1 - 3 of 3 Posts
Top