Hello My name is Dave,
I bought my 1974 CB750 brand new and still have it, it has been sitting for about 10 years it is not original it's a 70's stile Café racer.
It has an 812 kit with midrange cam, 4-into-1 exhaust carb work, dual disc in the front and gears in the 80's I installed a disc setup from a 1975 F model with SS spokes and aluminum rims.
I'm going to resurrect this bike with modern sport bike suspension front and rear but try to keep it looking 70's stile.
I'm going to start this project after the holidays and I'll start a thread on the progress.
Dave