if the screw is on the bottom near the bowl its a fuel screw.
yes, a pop on the decel is exactly what it would do if it was a little lean, move the screw to about 2 and a half turns out and give it a try. if it was rich it wouldn't pop, it would have trouble idling at a reasonable rpm and stumble and load up at idle.
Hey thanks again for the response.
I got it fire up and I've tried adjusting the fuel needle in/out and I cant get it to maintain idle after accelerating.
I get the popping in the airbox and then it cuts out.
If I open the choke one click it runs so I take it I have to open the needle futher out to 3 turns then??
Otherwise I'm going to take it apart again and make sure I didn't put it back together wrong
It's a pita to adjust that screw w/carb on bike. I know now why people change those screws out
try taking it out to about 3 turns, if it gets past 4 turns you need to realize the the pilot jet is probably clogged.
the thing is, the fuel screw is just an additional adjustment to the idle circuit, the pilot jet is your main means of metering fuel for idle/part throttle operation. the fuel screw is like a modifier to the pilot jet, its there so you can fine tune the pilot(idle) circuit. the pilot jet becomes clogged up very easily, so alot of times the pilot jet will be gummed up and the rest of the carb is clean, if this is the case the motor will get by on the fuel its getting from the fuel screw for idle, which means youl notice the fuel screw needs to be adjusted WAY out to get it to run right.
so like i said, dont be afraid to take the fuel screw out to around 3 turns, its becoming more common with todays gas, but if your like 4 and a half turns out, its time to check the pilot jet.