Topic: 1979 CB 750k Carbs local help

[petersburgfmc]

I have a 79 CB 750K.  A friend of mine builds Harley's for a living, but he isn't good with Japanese bikes and hates working on the carbs.  I live 40 minutes north of Evansville, IN.  Is there anyone who can work on carbs that would be willing to help a brother out.  There is no one in my area who will work on bikes over 15 years old except a few very un-reputable people.  My buddy and I did pull the carbs and sonically clean them before installing new air and pump diaphragms.  It still starves for fuel at mid-to high range.  Maybe we didn't get everything clean.  I bought the bike 2 years ago for a restomod.  It would have been the third bike I rebuilt and was in better shape than the others.  I made money off the other two, but on this one, I had a shop rebuild the carbs and stripped it down to the frame.  I found out when I went to clean the carbs again that they had never been gone through. I ended up serving with the Sudanese People's Liberation Army in South Sudan, so the bike sat stripped.  When I got back, I decided to put the bike back together and just make it something to ride instead of my sport bike.  I got most of the bike back together before being sent to the Philippines to work with their Gov. and churches to help stop child homelessness and human trafficking.  I ended up being their longer than I thought after being included with the Philippine National Police, Scout Rangers, Tribal Leaders, Muslim Coalition, politicians and church leaders in a peace summit.  Honestly, I have put so many new parts on this bike and got so angry when it didn't run, I put it up for sale, but was told it wasn't worth anything until I get it running smoothly.  Honestly, I don't even want to sell it but am frustrated.  I have never quit on a project before, but I am not sure where to go from here and need some help.  It doesn't help that after coming back from South Sudan, I had a brain injury and had multiple surgeries on my back and arms.  I am getting ready to go back to South Sudan for a brief trip to teach the South Sudan People's Defense Force Chaplains to stop atrocities on both sides.  Long sob story, but suffice to say, if you are willing to help, I would appreciate it. I know I am upside down already, but I can't stand the idea of quitting.  And, I don't want to work on the cosmetics if I can't get it running like new.

[RAFster122s]

Is the petcock flowing fuel with enough volume to keep the carbs fed at speed?  Is it dying when you try to run it beyond idle speeds?  Are the floats set to the correct fuel level?
Does it have CV carbs?
They are difficult to get clean. They have some tiny passages and can get clogged up and be a bear to clean and get running smoothly.

Got any photos of the carbs and which model of CVs are on it?

David

[petersburgfmc]

I did replace the petcock and it definitely has a positive flow.  It does not die at above idol, but if I try to ride it, it has no power beyond minimal rpms.  I only assisted my friend in tearing down and cleaning the carbs.  He did all the setting, but he builds Harley's and usually doesn't even work on people's Japanese fours.  Not sure if he got them right.  I usually don't do much more to the carbs than bench set and clean them and replace any rubber in them.  It usually is enough to get them running, then I send them to someone else to make sure I didn't screw them up and adjust everything.  I learned everything by trial and error and do not have some of the skill others of you have.   The good news is I did find a guy who works on atv's in my area, but he can't give me an estimate on how many hours it will take to pull the carbs, clean them again and sync them right.  I don't want to get a bill for $1k when I get back from South Sudan for a bike that will never be worth what I have in it already.  That is why I was just trying to get someone to help me.  I just want it to run correctly.  Then I can buy new tires, fender and tail light assembly without my wife divorcing me.  Then I will ride it until I wear it out or grow too old to ride.  That is the only way to get my money back...through use.  Otherwise I will just have to sell it for parts or junk and lose everything I have in it.  I still have my daily rider and a V45 my friend just gave me to work on, but the Magna is in pretty rough shape.  It might take me a long time to get it running.  Especially if I have to buy parts slowly so my wife doesn't see how much I am really spending.  LOL