It’s running lean. On the throttle where the gold bit is in that tiny hole there should be a little back cap and u drill that out carefully and use the tiniest flat head screw driver and turn the screw anticlockwise about a half turn and it will make it run richer. Hope this helps.
Aww, I want that dirt bike. I only got the cheap version, a regular bicycle with the plastic water bottle to make the engine noise, but sometimes it falls off.
Trust me. You do not want these cheap little Chinese dirtbikes. They're a piece of shit. Atleastt get something with a shifter and clutch. Way more fun and prepares you for bigger dirtbikes
open the gas gap when trying to prime it it has one of those gas cap stem cap things i put one of those in my 150r and it gave my trouble starting it was becuase it couldnt create enough of a vacuum to pull gas thru carb because of the lil gas cap tube cap
The carburetter needs to be cleaned probably the pep cock is plugged a bit. The floats probably need to be adjusted. Guarantee you the carburetter needs to be cleaned.