There is a drain screw on the carb bowl, open it and drain the bowl.
Replace the spark plug.
Tighten the plug wire into the cap before connecting.
Tighten the carb connection to the engine.
'02 KTM 640 Adventure-lowered
"On the road there are no special cases."
Cormack McCarthy-The Crossing
The faster it goes the faster it breaks.
And high performance=high maintenance.