Topic: 1978 CB750 K8 Piston Case

[mmitchum]

Hi, all.  I am brand spanking new to SOHC 4s and looking at a wrecked bike to begin a cafe build.  The guy is gonna send me some additional pics of the bike tomorrow, but I noticed that the fins seemed severely damaged (see attached pic).  My question is: Is it OK to buy another piston case and swap it out? 

I know that the case halves need to be matched, but can the piston cases (is that even what they're called?) and heads be swapped out?  If so, what should I look for and look out for?

Thanks

[Airborne 82nd]

OK what part are you talking about?
https://www.cmsnl.com/honda-cb750k-750-four-k-1978-usa_model7244/partslist/

[mmitchum]

Sorry, guess the pic didn't upload. It's this case with the cylinders: https://www.cmsnl.com/honda-cb750k-750-four-k-1978-usa_model7244/partslist/E++03.html#results

[754]

I am running a worse one.
 It is the cylinders, that you want to replace, later if you get it.

[mmitchum]

Does that mean that I should NOT replace the case for some reason to do with fitment?  I would rather not have that huge chunk of fins missing.

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[BPellerine]

no it does not mean you should not replace them,just get the right one with the dowels as you have now,and for a k model.

[mmitchum]

no it does not mean you should not replace them,just get the right one with the dowels as you have now,and for a k model.

Awesome. I figured that was the case, but wanted to be before I buy the donor bike.

Thanks!

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