whats wrong with my carb ytm 125

[justinbtrippen]

ok im getting gas lol but the only time it will run right is when i put a hose on the bowl niple .then put my thum on it for a bit and take my thum off what is wrong with this pic/ i dont know what to do my first trike and i dont even know how to fix it i want to ride so bad:wondering

[TriMotoMan]

the hose from the bowl is supposed to be hooked up to the engine down on the side

[justinbtrippen]

where on the side all the hoses where off when i got it