Topic: CBR motor

[ANVkevin]

Has anyone seen or heard of someone putting a CBR (or other sport bike) motor in a CB? I did a bit of research and came up with nill. Don't get me wrong, I'm a bit of a purist (cafe, not stocker) when it comes to these bikes; however, I would love to see how it worked out for someone. I'm not sure of all that would have to go into the swap (I'm sure a ton), but thats what they made torches and welders for, right?
 

[Retro Rocket]

I have seen a gsxr1100 motor in one, it was in a British motorcycle magazine a few years back.... Street fighters was the magazine i think.

Mick

[ColinMc]

Just for the hell of it i've tried putting a couple motors I had sitting around in my CB frame. The problem is everything I have is liquid cooled, so then you run into that whole mess of problems. The Ducati 748 motor wasn't even close to fitting lol...the FZ750 motor...sort of...the GSXR600...i wish lol.

[Alan F.]

You probably could get it to work with enough time and money...and patience and imagination.

My take is that you would probably do well to design and build your own frame based on a 79-82 CB750 steering neck.
Keep the 79-82 Vin and title, the neck will accept modern front ends with very little hassle because the length is what Honda stayed with from 79 to the present day.
Build a more traditional CB750 sohc styled bike using traditional stock sohc 750 tank, seat, and chrome fenders, use whatever swingarm, wheels and front end you want.

It'll look great, it'll ride well if you design it well, and you'll get more attention than you bargained for.  Got bars on your garage windows yet?

Cool idea, I'll have to try one someday when there are no more sohc 750's left.
-Alan

[cadyjam]

Has anyone seen or heard of someone putting a CBR (or other sport bike) motor in a CB? I did a bit of research and came up with nill. Don't get me wrong, I'm a bit of a purist (cafe, not stocker) when it comes to these bikes; however, I would love to see how it worked out for someone. I'm not sure of all that would have to go into the swap (I'm sure a ton), but thats what they made torches and welders for, right?
 

I am currently working on it right now. I am starting out with a 72 CB500 frame and am putting an 04 600rr motor in it. I am thinking about stretching the frame a couple of inches but we will see. It will be a modern/classic style cafe.