Artless
CB750 Member
First off, hello to all you CB750 gurus and wrenchers, glad to join the conversation over here on these beautiful bikes. I also appreciate in advance any and all help and advice, and hope I can help others moving forward, too.
I bought a 1980 Cb750F as my first motorcycle, quite honestly with the intention of it being the first of many bikes me and my friend could buy, fix up and flip. As I bought the bike I started learning more and more about it and have fallen in love with it, choosing now to build it and hang on to it, well, pretty much forever.
That being said, I have found a lot of useful information online that has gotten me completely through the disassembly and ready to start putting it back together. At this point I do have a few questions as I am getting into more specific details with trying to make sure i get in tuned and running properly.
Here's a picture of the bike when I got it:
Here's the history to give you as much information as possible about the bike:
The bike was bought off of a 27 year old who seemed to have the bike because it was "cool". He claimed it was running good before the winter and didn't know why it was backfiring this summer. Upon finding the coils were wired to cylinders 1&3 and 2&4, I don't think he really respected the bike to learn to properly maintain it, and after he put many miles on it, it was more than he could handle to tune and repair. The bike has 20,000 miles on it with the stock carburetors running the stock airbox and 68/108 jets, as well as a 4-into-1 exhaust (that was poorly installed and leaking considerably). When I got it, after rewiring the coils 1&4 and 2&3, cylinder 1 exhaust was pretty cold (it's carb looking suspiciously dirtier than the others) 2 was warm and would get hot(ish) after warming up, and 3 & 4 seemed to be hot. Since I didn't know the extent of the neglect, and because the engine was very dirty and there looked to be excessive oil on the case around oil pump and chain area I decided to do a full rebuild.
I bought a 1980 Cb750F as my first motorcycle, quite honestly with the intention of it being the first of many bikes me and my friend could buy, fix up and flip. As I bought the bike I started learning more and more about it and have fallen in love with it, choosing now to build it and hang on to it, well, pretty much forever.
That being said, I have found a lot of useful information online that has gotten me completely through the disassembly and ready to start putting it back together. At this point I do have a few questions as I am getting into more specific details with trying to make sure i get in tuned and running properly.
Here's a picture of the bike when I got it:
Here's the history to give you as much information as possible about the bike:
The bike was bought off of a 27 year old who seemed to have the bike because it was "cool". He claimed it was running good before the winter and didn't know why it was backfiring this summer. Upon finding the coils were wired to cylinders 1&3 and 2&4, I don't think he really respected the bike to learn to properly maintain it, and after he put many miles on it, it was more than he could handle to tune and repair. The bike has 20,000 miles on it with the stock carburetors running the stock airbox and 68/108 jets, as well as a 4-into-1 exhaust (that was poorly installed and leaking considerably). When I got it, after rewiring the coils 1&4 and 2&3, cylinder 1 exhaust was pretty cold (it's carb looking suspiciously dirtier than the others) 2 was warm and would get hot(ish) after warming up, and 3 & 4 seemed to be hot. Since I didn't know the extent of the neglect, and because the engine was very dirty and there looked to be excessive oil on the case around oil pump and chain area I decided to do a full rebuild.