Changing jets in z400
#21
#24
Changing jets in z400
Yep, the fuel screw is at the bottom of the carb and is covered with a small brass cap. The cap has a very small hole in it's center. You have to drill the hole to 1/8" ( don't drill too deep, you will destroy the screw!) and thread in a self tapping screw. Pull the cap out by grapping the screw you inserted with pliers and you will see the fuel screw. Adjust to your liking. Mine is set at 3.5 turns out with 165 DJ main and needle clip in the 3rd position. That's with a Big Gun full exhaust and a K+N filter with outerwear cover, no lid on the airbox.
#25
#28
#30
Changing jets in z400
Yeah, I think it's worth a look. There's no way I turned mine in 1 1/4 turns when I threaded in the screw to remove the cap. I checked the slot on it and it was clean, no marks. Me thinks they are setting them more for emissions rather than performance [img]i/expressions/face-icon-small-happy.gif[/img] . Simple fix [img]i/expressions/face-icon-small-wink.gif[/img] .