any chance you may have a little water in your fuel? i have had mine act like that before from some water in the floatbowl. so your saying it didnt do this before and one day it just started?
Before i removed the oil injection it was running bad, cuz of the sh*tty yamalube, i removed it, used a kit....Removed gear, put block off plate, put vaccuum cap with rtv in the brass nipple.
Mixed fresh gas and the old problem went away, started running great. Then like a week later i go out riding and it started doing this, i figured, i was running rich, true, so i jetted it, plug chop, plug brown color like it should, but it didnt go away.
Then today i found that airleak, fixed it, problem still persist, jetted again, got it jetted and plug chop and jetting is fine. Still does it.
Now today,after working on the blaster, i go ride my dads DS 650 to warm it up, we are waiting on the pin that holds the float, so right now that float is being held with a wire?? i dunno how its said in English. Anyways, went to test ride it, and it started doing a similar problem. SO now im thinking Float level??
But i checked it, and its within specs, 20mm, float needle is clean, all passages are clean, anyone got an idea?