New to forum need help with gas leak

[Mmatti]

I recently got a 2000 banshee and when it's running it doesn't leak any gas but once I turn it off the gas will start leaking, then if I turn the petcock off it will still continue to leak but way way slower like a drop every couple minutes and I'm not sure if the petcock isn't sealing? Or what the problem is thanks for any help

[kawa110]

Look up....

Fuel valve needle and seats
And
Carb bowl float adjustment.