sorry about this nood question :oops: still learning about the bikes(only had mine since saturday

)
is the choke the leaver behind the air filter that when its down it restrics air flow?
also my bike wont idle, i start it but it just takes off, i relised on the bit where the clutch cable conects behind the air filter once you give it abit of gas it dosent go back to the idle positon, it this nnormal? the guy i bought it of has a spring there but is dosent do the job so im gona put my owne spring in their next time i take the farings off.