Tank scooter chugs and dies when given gas.?

Hopefully you just need to adj. the high speed needle valve. Be sure and check the original adjustment by turning all the way in and counting the turns. Then back out to where it was then try turning out 1/4 turn and see if it is any better if not go 1/4 turn to original setting and then go in 1/4 turn if this helps you are going correct way. If you forgot the original setting just go all way in then back out original setting.