Ive been tring to get my 1976 cb750f carbs right and i want to know if anybody has any input on this.whats happening is my # 1 and #4 cylinder is running rich and my # 2 and 3 is running a bit lean. this is what i have done to remedy this with just partial success.First off ive dropped the float bowls to check if the previous owner fucked with the jets.I found the # 4 main jet lyeing in the bottom of the float bowl put it back in and started running on all 4 fancy that.All 105 s thats a factory jet setting.So i bumped them up to 115s all of them.put a brand new set of plugs to read and is better but not right yet.next i checked syncro its pulling very close to all carbs.i checked for intake leaks on 2-3 and negetive.have not checked needle setting yet. help if you can please!