Hey folks I need a little help. I am working on my kids stock 2005 CRF 80. The bike has a little bog off idle so I'm thinking of going a little leaner on the slow jet to make it a bit snappier. I tried to adjust the screws to correct the problem but, didnt help. So I took the carb off the bike and pulled the fuel bowl to check the jet number to order another. Next size down is like a week or so away. While the carb is apart I cleaned it out, sprayed all down with carb cleaner and blew out all the orfices. Then wrote down jet numbers and put back together the way it came apart without making any adjustments. I put the bike back together. I went out and bought an aftermarket air filter thinking it would flow a little better than stock and lean the bike out a touch to help while waiting for the new jet. Well, this is where the problem is. I start the bike and it starts fine as long as I am on the throttle. The bike now will only start, idle, or run if the throttle is about 1/8 to 1/4 or more. If I try adjusting the idle screw it makes no difference whether it is all the way in or out. The air fuel screw doesn't affect anything if it is turned all the way in or out either. I thought maybe the new air filter somehow caused a problem, so I put the stock filter back in and it acts identical. Both filters are clean with fresh filter oil. After all this I took the carb back apart to double check everything and as far as I can tell, all is okay. This is killing me because I can't figure this out. Any help would be much appreciated.
Just a note this isn't my first adventure in a carb. I have had numerous ones apart in the past cleaning, jetting, or rebuilding and have never run into this issue.