Hi everyone. I must say I'm a bit stumped. I got a Zongshen LZX 125 - 18 and it had problems with starting and idling. It used to have to be revved to be kept running. I then cleaned the carburettors and now it over revs to about 4000RPM. No air leaks and idle screw all the way out. Can someone give me a bit of help on how to tune these carburettors properly and where on them do I adjust the mixture. I cant find any screws or anything as I know it was running too rich before from a sooty plug. Any help?
Thanks