Ok ive been at it for a week on this thing. It won't normally start. But the weirdest thing is it will only start if I take the tank off flip the bike upside down and getting all fuel out of the bike. Then 8 kicks or so later it start up for about 10 seconds and shuts down and won't start back up. So back story. A year ago I dropped it well running it up a ramp and it skipped a tooth on the timing. It sat for a year and last week I fixed the timing changed the oil and oil filter and changed the gas out. Still wouldn't start. So I took the carborator apart and cleaned it and replaced the fuel line.. still wouldn't start changed the spark plug checked for spark that was good. Still wont start. So that's when someone recommended making sure all the old fuel was out. So idk I was sick of this thing and wanted every drop of fuel out of this bike. So I took the tank off and put it in first, grabbed the handlebars and put it upright on its back tire then upside down. Pulled the throttle a bunch and got all fuel out of the carborator and motor. Put it on both wheel and it started up! Didn't sound the best but it started and lasted 10 seconds. I stopped it and waited a bit and it wouldn't start again. No matter what I did.. so whatever I flipped it over again and and drained it. And it worked again! Same thing 10 seconds turns off won't start again. Any ideas? Anyone please!!!!!