Moped runs too rich when idling?
Hello, my moped is a 4-stroke engine with a 19 mm carburettor and is running too rich when idling, even though I have screwed the idle jet in completely. It is still running too rich. Is the problem with the main jet?
You mean idlingscrew. The designation is also incorrect, because it affects much more than just idling.
But whatever: If this is an air-regulating screw and not a mixture-regulating screw, then congratulations – turn the mixture in Fat.
https://www.motorradonline.de/ratgeber/ratgeber-vergaser-einstellen-die-real-mixture composition/