Grubee Skyhawk gas issue

[aquielisunari]

My motorbike is running well, incredibly well. I've went through one tank @ ~20:1(regular gas 87 oct.) but apparently as everything is settling in and getting comfortable there is better compression or something because it's idling a bit faster than it originally did. Without giving it gas, after I initially crank it up, the bike will cruise at about ~5mph or faster. It didn't do this in the beginning. While it helps during ummm idk dead stop accelerations I'd like to reduce the amount of gas it's receiving without screwing up the air/gas mixture. Should I leave well enough alone and be happy that I'm apparently getter better compression as time goes by or should something be dialed back after I go through another tank?

 

[dougsr.874]

Sounds like the engine is getting broken in...always runs better after some use...If it's the standard NT carb there is NO air gas mixture....on left side of carb is an adjustment screw for the idle setting ...turning left decreases idle.....If its a CNS carb I throw them in the garbage