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CB350F Restoration by royhall (NOW FINISHED)

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royhall:
Cheers Oddjob, its more complicated than I first thought. I think I get it now though. Letters on the casting are the OD of the shells, on the cranks its the ID of the shells, so to speak. So the table refers to two measurements. By gad, I think the boys got it!!! ::)

royhall:
Okay guys, what happens when the lettering on the crank is just simply not visible. Have carefully miked the journals after checking the mike with slip gauges. They all mike the same at 1.2590" and that is the boundary between one colour and another. Now I'm properly stuck for what to do. I can only get 4 numbers off the crank 1A, 2A, !A, 2 and that's it? Letters on the back of the crankcase are BBBCC. How do I proceed. Cheers.

royhall:
Okay got some numbers, picture below. Its the picture from the other thread so ignore the white lettering mine is the black marker pen. Certain of them all except the very left one, could be a 1 or 2 but my guess is 2. That web is a bit messy as it's been weight drilled right where the marking should be. They all mike up exactly the same at 1.2590" mains and big ends. All the conrods are C2. Casing stamps are BBBCC. There are also some bits of colour left on the sides of the shells (not enough to be reliable) but will use to try to double check the left main journal.

So if somebody can check my homework for me, this is what I get.

All big ends are 2A (yellow)

Mains are: B2 (brown), B1 (Green), B2 (brown), C1 (brown), C2 (black), What do I do about this Black one as they are obselete.

Hope that's all correct. Thanks everyone especially Oddjob, man your a star.

royhall:

--- Quote from: Oddjob on May 20, 2015, 07:41:42 PM ---This site has some left

http://www.hondarestoration.com/partNumberResults.asp?partNumber=13314-333-003

Due to postage it may be better and possibly cheaper to buy as many of the shells from there as they have, they have a couple of browns, some greens but no yellow rod shells

Checked your results and they seem spot on.

--- End quote ---

Checked them out, they are Blue AA not Black A. (13315-333-003). Blacks are discontinued everywhere it appears. The journal mikes up exactly the same as the C1 Brown next to it, so not sure why it should be a different shell. Perhaps Honda weren't that accurate in 1972? Not sure what to do.

royhall:
They don't have them either. Been through every website that Google threw up this afternoon, it was a long two hours. Appears that Blacks are completely discontinued every site says the same. Don't know why I cant just use a brown. Its a C2 on paper but it mikes up exactly the same as the C1 next to it. Pretty sure I wont be getting a Black anytime soon, so will have to make a decision based on actual measurements rather than 43 year old numbers. What do you think.

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