Gediminas
CB750 New member
Hello,
I have a problem with my Honda CB750 bol D'or 1981', It seems that it is running to rich, when hardly accelerating it looks that not all fuel is being burned and that confirms spark plugs, 3 are completely black and one is OK. Carbs were just rebuilt, cleaned in ultrasonic bath, all parts that came in rebuilt kit where changed, jets are stock (102 and 68), air filter is stock and new, air/fuel mixture screw is set same in all 4 carbs and set as in manual, stock 4 to 1 exhaust and no black smoke. Bike is starting just after pressing start button, no matter cold or warm, choke is working and is not stuck.
I am thinking whether is a fuel or spark problems, so I tried to check spark in all cylinders and compare with the one were spark plug is OK, but from visual side can't see any difference, battery is new and is charging OK (checked with multimeter). Maybe some of you guys had same issue or have some tips what to check next, because I am running out of ideas.
PS. Bike is stock and original and has VB52 carbs on it, it is the first time when bike is running in my hands, because I bought it with carbs issues already, carbs where leaking.
Thanks for any ideas.
I have a problem with my Honda CB750 bol D'or 1981', It seems that it is running to rich, when hardly accelerating it looks that not all fuel is being burned and that confirms spark plugs, 3 are completely black and one is OK. Carbs were just rebuilt, cleaned in ultrasonic bath, all parts that came in rebuilt kit where changed, jets are stock (102 and 68), air filter is stock and new, air/fuel mixture screw is set same in all 4 carbs and set as in manual, stock 4 to 1 exhaust and no black smoke. Bike is starting just after pressing start button, no matter cold or warm, choke is working and is not stuck.
I am thinking whether is a fuel or spark problems, so I tried to check spark in all cylinders and compare with the one were spark plug is OK, but from visual side can't see any difference, battery is new and is charging OK (checked with multimeter). Maybe some of you guys had same issue or have some tips what to check next, because I am running out of ideas.
PS. Bike is stock and original and has VB52 carbs on it, it is the first time when bike is running in my hands, because I bought it with carbs issues already, carbs where leaking.
Thanks for any ideas.