Yep, the '77 SOHC CB750K's had 4 into 4 but the F's had 4-1. Honda postponed the release of their new DOHC inline-4 until '79 to celebrate the 10 year run of the inline-4 CB750's. Quite a lot of changes including the 4-2 pipes.

The '79 also had chrome acorn nuts whereas the '80 and later had stamped out bolt and nuts. I believe the '80's and newer also had the 80 MPH clocks that were white back lit whereas the '79's were 135 MPH or so with red back lighting.

The only draw back with the '79 is that it had swing arm bushings rather than the later years with needle bearings.

 

Some argued back in the day that 4into2 was better. Equal length runners and more balanced back pressure than most 4into1's

 

BTW CB2CBR

what's the verdict / review on your new handy dandy HF bike lift ?

 

Looks real good Jim.

Are you coming up for the Moto GP. I have a bedroom open.

 

Sprock: Lift is fine. Bang for the buck but need the better wheel clamp, but knew that going in.
Indy: Good to hear from ya man! Thought we may have lost ya to the reality of the real world. Still have to work out MotoGP, but I'll be in touch.