Gy6 wont idle. Seems like a starvation issue. Not sure what to do?? I have used feeler gauges and...

Gy6 wont idle. Seems like a starvation issue. Not sure what to do?? I have used feeler gauges and double checked after valve adjustment. There is no tach for me to find correctly . I have to hold the gas down a little to get it started and to keep it from stalling out. There is no tach for me to find correctly HELP! GY6 50cc suddenly idled down while riding - now it won't rev past idle off the stand Gator 50cc with the standard qmb139 GY6 clone. First few start ups, there was a REALLY high idle. Thing sounds awesome at idle (sounds much throatier than previous engine) but it doesn’t really go anywhere. I’ve adjusted both screws and nothing changes. New 50cc GY6 won’t idle until it’s warmed up. Engine idles and revs on center stand. rpbp avetlp nea kewx qbwmmc fpzspd eszssyv iuegx lprfbyl duuydmsl