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Author Topic: cyl head year  (Read 1277 times)

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2valve

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cyl head year
« on: March 17, 2007, 03:17:54 PM »
Can you tell what year this head is by these stamps?
thanks for the help!
the block is 78 but the cyliner & head are older.
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Offline 736cc

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Re: cyl head year
« Reply #1 on: March 17, 2007, 04:32:56 PM »
if it doesn't have a bolt hole in front middle, its an early ko or sandcast
a side view of cylinder head fins will reveal if its a post 1972
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: cyl head year
« Reply #2 on: March 18, 2007, 09:11:29 AM »
Look on the top fin intake side between # 2 & #3. What markings are there?
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,929
  • Bought her new 4/75
Re: cyl head year
« Reply #3 on: March 18, 2007, 06:59:12 PM »
My 75 750F has a 392 cast into the top fin in that area. My 78 750K engine has a 392 cast into it plus a K8 hand stamped next to that. The K8 head has a few refinements/changes to the springs & keepers, etc. Both these heads are more or a hemi chamber than the earlier K heads. The shrouding from the earlier K heads had been removed. Hope that helps. More/better pix always help.
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As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)
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