Hi. I have just bought a 1978 CB750F2 which had something of a partial rebuild some 7/8 years ago and not run since. I can start it but its well rough, ‘hunting’ and when reved the carb pistons drop without sticking and the choke seems to be adjusted ok yet the revs stay high and return slowly and then it dies so…I have a few questions/need advice before I start taking it apart.
I have a Haynes (better then now’t) and at Section 8 it says that the F2 is.. main jet 105, slow running jet 35, main air jet 120, pilot air jet 150, jet needle setting F2051F-2 and pilot jet setting 13/4 turns out. Does this sound correct?
Also, there is a warning “Do NOT remove the slow running jet as it is a tight pressure fit” and needless to say the exploded diagramme does not show it so anyone know its location and how it is supposed to be checked/cleaned?
Any help gratefully accepted – I will no doubt need some more soon!!