392 cub jetting and air screw help.

[Dave I.]

I am looking for jetting ideas and help. I am having a hard time with the air screw. I had it running decent yesterday with the carbs out of the box. I tried fine tuning them with the carb synch tool and ive got everything out of adjustment.

 

When I have the air screws out 1.5 turns like everyone says it wants to idle really high. There is no tension on the slides so I know they are bottomed out. If I take the screws out a little more (more than 2 turns) I can get it to idle ok but I dont think that is correct.

 

My jetting is 165 main, 48 pilot, cel needles on the 4th clip from the top. When it is sitting at an idle and I hit the throttle to wide open it has a little hesitation then revs up. Im not sure where to start now.

 

68x54 cub cleaned up by Jeff

35pwk

Shearer sb in frames

19cc domes

timing +7

VF3 reeds

VP 110 fuel

15/41 gearing for dirt/asphalt

+6 swinger

Pod filters

Lightened flywheel

 

Let me know what you think.

 

Dave

[wesw]

i think with a 48 pilot you will be like a turn out if that. i ran a 52 and i was like 1.5 i think

you will just have to listen to your bike. just cause some says 2 turns doesnt always work for each person.

 

if at 1 turn the bike idles smooth and if you rev it up and it rev quickly or steady i think you will be fine.