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Engine displacement vs stated CC's ???

Posted: Sun Oct 07, 2018 10:29 am
by Cb673
Hello all,

So the cb650 is bore x stroke is actually 627cc, with head chamber of (?) 24cc.
Making roughly 650 when added together.
If a motor were bored out, and one wanted to put cb"XXX" on the side covers, should the head 24cc's be added as well?
I'm doing a 62mm overbore soon, and don't know if I want to put cb673, or cb696 on the side covers...
673cc is only bore x stroke, 696cc is bore x stroke +head cc's

What's your opinion?


Re: Engine displacement vs stated CC's ???

Posted: Tue Oct 09, 2018 1:58 am
by Volker_P
Welcome here! :D

At you find a nice, free tool for picture view and resize.

With regard to your side cover label issue, I would prefer the "696" just because of the visual beauty of the sequence of digits.
In case you really cannot decide for sure, there is still the option to preliminarily put "cb XXX" on the side covers, too. :lol: