CB750 rod bearing replacement

[Doode]

New member!

I have a friends cb750 which was a fresh top/bottom build, had the oil lines crossed and seized before ever seeing any miles.
Upon disassembly, everything looks okay except a single rod bearing is toast. The plan is to clean up the crankshaft surface and install a new rod bearing.

I've checked the FSM and am lost in the spec chart, and am hoping someone can help decipher. I've done a few searches which reference different colored bearings... All I pulled out are silver. I'm totally missing something.

Attached is the seized bearing.

I'll post the rod code later today. I didn't record it before buttoning it back up. All work is done in my dusty backyard, so best chances of keeping things clean are to reassemble the cases and side covers, and valve cover of needed, each time I work on it. Fun, right?

Thanks for the help!

Edit: the shell of the bearing has code D5J-A STD

[TOOLS1]

What you want to do is take the crank to a machine shop and have the journal polished. Then find an oversized rod bearing that corresponds to the amount of material removed from the journal. Your bearing is marked "STD" so this should not be hard to determine what size you will need.
Also, your rods should be stamped with a "weight code" on the side where the rod bolt goes through, and the crank should have numbers stamped on the side of the crankshaft weight that faces the cam chain sprocket. These numbers should also tell you what size bearing you have.
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[Doode]

Thanks for the reply! Good timing as I had just started to look around.
The rods are

D1 - D2 - D1 - D2

I wasn't able to locate any markings on the crankshaft, other that what looks to be a date and a squiggly B

[TOOLS1]

There should be a series of markings on the weight in the middle facing the cam chain (I'm sorry, it will be on the primary drive sprocket side) sprocket. You will want the first set of numbers.
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[Doode]

Sorry for wasting your time. I found them. Should've read the manual better... Found the marks but will need different lighting before I can read them. It's too bright out at the moment.

[Doode]

Wow. Those are some hard to read markings!
I wrote down my best guess, AAAAA and 44-??
Will update once there's more action to report.

[Doode]

Oh man, I cannot seem to get the cam chain off the sprocket. I don't want to break it, but can't imagine there is any other way.
Is there a trick, or is the flat link chain a break only?
Slotted sprocket and fancy cam.

[TOOLS1]

You need to loosen the cam chain adjuster, I just remove them. Then work the sprocket off to the side so that it drops off its seat on the cam, then you will have plenty of slack. Also since it is a slotted sprocket, you will have to degree the cam in, or go back to a stock sprocket.
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