ATC 90 Carb issues

[ATC350X 85]

My '78 atc 90 will start to sputter in turns once ive ridden for about 20 minutes, it wont sputter if i keep the RPMS up but if theyre a little low it will start to sputter. It also pops a little out the exhaust. Also it will do the same things after i jump it. Also the seat for the float, should that have the springy side up or down, I dont remember, i have it with the springy side up, that maybe my problem, but not sure. I rebuilt the carb over the summer with a new kit and just recently started doing this. I am pretty hard on it, but its all for fun.

[Teroy]

The point of the needle should be up into the carb and the "springy thing" should rest on your actual float. However your problem sounds points related or possibly valve.

[ATC350X 85]

Yeah, but if i go in a straight line it doesnt sputter, only when i turn or jump, so i would think it has to be carb related.

[Teroy]

Ahhhh, Yeah I would say your carb is loading up due to the needle not seating correctly.

[ATC350X 85]

Oh, you know it does kinda sound like its doing that, I think i have the clip in the very first slot on the needle cause that thing runs very rich. It definitely gets rich when it bogs like that.

[slippy4]

check for electrical problems, my 200x did this same thing, ran perfect for a month or so, then i was spinning doughnuts in the field and it sputtered a few times but ran perfect, then it progressivly got worse. it would run fine when in a strait line but as soon as you jump or turn it would run like crap,,, ended up being a couple of wires were bare (i dont think i ever taped them) and they worked there way to the frame and grounded themself out, then it lost spark untill it released itself from the frame.

[ATC350X 85]

Ill take a look at that, thanks

[ATC350X 85]

Im still thinkin its a carb issue, anyone know the factory settings? Its pissing me off.