Understanding the basics, with reference to the zxr400
Posted: Sat Jun 08, 2013 9:30 pm
Hi guys,
My L9 is running okay, but I think there is room for improvement - basically its cold idle is very lumpy, and sits at about 600 rpm, whilst when upto temp idles about 1600rpm - a tad too high if im honest.
Secondly, any amount of choke will stall the bike. I have a feeling it might be setup to run too rich.
Anyway, before I take the carbs out and have a look, I want to understand the zxr400s idle / pilot circuitry.
Am i right in thinking the flow on the pilot jet is constant / non adjustable, and fueling at idle is adjusted by varying the airflow with the pilot air screw?
Only, whilst doing research, it seems that sometimes bikes have an adjustable pilot air screw, and some have an adjustable pilot fuel screw, slightly confused right now!
My L9 is running okay, but I think there is room for improvement - basically its cold idle is very lumpy, and sits at about 600 rpm, whilst when upto temp idles about 1600rpm - a tad too high if im honest.
Secondly, any amount of choke will stall the bike. I have a feeling it might be setup to run too rich.
Anyway, before I take the carbs out and have a look, I want to understand the zxr400s idle / pilot circuitry.
Am i right in thinking the flow on the pilot jet is constant / non adjustable, and fueling at idle is adjusted by varying the airflow with the pilot air screw?
Only, whilst doing research, it seems that sometimes bikes have an adjustable pilot air screw, and some have an adjustable pilot fuel screw, slightly confused right now!