air.screw.or.pilot?

[Pittsburgh400ex]

Been a while fellas. Finally got my dasa on this weekend. Pops real bad on decel. A few.friends said air screw. I always thought that was pilot from tuning my 426. Main and needle are dead.nuts. one size main bigger and it sputters.. so, i need to buy pilots or mess with the air.screw? Thanks.

[LeGaCyGiAnT124]

What's your main jet at and what does your plug look like? Do you run an airbox lid, no lid, or HRC lid? I would try a 185 main if you don't run a lid/ HRC lid.

[D Bergstrom]

Popping on decal is usually the fuel screw, but could also mean you need to bump up the pilot. How far out is the fuel screw now? Turn it out a 1/4 turn or so at a time and the popping should stop. If you get to more then three full turns out, then you should up the pilot jet.

Doug

[Pittsburgh400ex]

Main is fine. Just pops on decel. But since you asked, unifilter and no lid.

[quad2xtreme]

agree with Doug.

[Pittsburgh400ex]

I was about 2-3/4 out to start with. I went 1/4 turn each run, out to 3-1/2. Helped a bit but it's still there so i will up the pilot. Thanks for the input fellas.

Honestly i probably would have left it go but i don't know what it is with this Dasa...but the backfire pops are REALLY loud. Louder than it was on my Sparks even...and a sparks is loud, lol. Other than that, Dasa makes a nice pipe. The full "slip-on" desoghn is awesome, no clamps or bolts to come loose or break and in my opinion, the growl is perfect, not too loud like a HMF or anything, it's just perfect.


Someone asked main jet size...i dont remember exactly, i think a 185 or 190. I know when i put the next size up in the carb, it wouldn't wind out fully.

[Lquad71]

also make sure everything is sealed up and you used a new exhaust gasket. If the intake/carb/exhaust has an air leak it will cause it to do this.

[Pittsburgh400ex]

I know the carb side is good. I used a new gasket and i havent double checked that but i will. Thanks.