Hi @all! My name ist Fabio and i am from Germany. I just bought a used Heist with the 156FMI engine. I am searching of any information about to tune this engine and carburater. I found a lot of useful information here about Valve clearence and startetd to work on my bike. It still runs like crap.. i think my main jet is much to big but i have no idea which Size it has looks like 100 to 105...
and sorry for my worse english...