Thanks guys. (Thanks for the links too!).
So, I have been lurking for a few months as a guest. Been reading all of the engine restore threads, etc.
My main ride is a '06 Honda ST1300A and a KLR650. I've always loved the CB750. My dad used to take me for rides on his CB550 when I was a kid. I grew up fairly poor, but, somehow, my dad always found a way to have my brother and I riding. He got me a mini bike when I was 7.
So...I was reading a bit more last night, there is a section in the Honda CB750: The Complete Story that reads:
"The Mysterious K0"
"Here we enter a slightly contentious area. The designation K0 was used by some in the USA retrospectively to mean all production bikes before the K1. In the UK, however, a different definition is used. What is meant here is a small number of bikes, probably about 120 worldwide, that were produced in mid 1970 with some revisions which were to appear later on the K1 model. It appears that the revisions in question were confined to the carburettors (and consequently throttle cables) and air cleaner boxes."
It goes on to talk about how the modifications were changing on a monthly basis and stabilized later in the K1.
It's still probably wishful thinking, but still interesting....
I'll report back later. I plan to call the shop to check out this auction to make sure it's not a fake.
Cheers,
<D>