help identify

Howdy, I think either this form is dead or there aren’t enough users on here, anyways I posted a discussion over in garage and im assuming its the wrong spot so I’ll try here, here’s the link if anyone can give me a hand figuring it out it would be much appreciated...

Last year I bought a 1975 CB750 F1. At least if it comes to the Titel. The thing that is bothering me is the rear drum break. No matter where I search I cant find other examples of an other bike with that configuration. Was the break fittes as aftermarket or is it Not an F1 Model? The Tank...

I picked up an old Honda. I think it’s a 79 to 83CB 750 but I need to know what parts to get for it. Engine number is. rc01e- 2314067

I ordered fork seals from 4into1.com based on my bike's year/model but they're the wrong seals, for sure. I've submitted photos of my fork's internals in hopes that someone can help me ID them so I can get the correct fork seals. My bike is a '73 CB500 K2