Missing Idle Screw!

[CHIPS X]

Does anyone know what size screw the carb idle screw is? (48cc Starfire) Mine was backed out pretty far on the ride home and...gone. Now I'm running but she dies with every clutch engagement. Can anyone help? I have a Fastenal down the street so I bet I can fix it today if I can figure the size out! Thanks for all the help everyone! Chips

 

[wildemere]

A rounded M4 x 30 screw is what you need. Use a file or grinder to round the end.

Also a spring.

That carb will be really lean without the screw.

 

[CHIPS X]

I made it home with an 8/32 x 1/2 as an inpromptu idle screw. I will grab the correct one tomorrow. I just file it to a rounded point, correct? (I've never seen the end of it before) Thanks guys!