Author Topic: will 78 jugs fit a 77 engine?  (Read 1321 times)

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Offline InexperiencedAaron

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will 78 jugs fit a 77 engine?
« on: May 01, 2014, 04:46:10 PM »
Hey guys wanted to know if 78 750k cylinder jugs will fit a 77 750k engine?
snapped off a bolt in my jugs and then snapped off two drill bits and an easy out inside of the bolt. :(
No machine shops in my area will touch it.

Offline calj737

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Re: will 78 jugs fit a 77 engine?
« Reply #1 on: May 01, 2014, 04:51:26 PM »
Is there enough of the bolt exposed to weld another hex bolt to the end, then turn that?

If not, EDM will remove that bolt. Not cheap, but the only sure fire way to get it out-
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Offline InexperiencedAaron

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Re: will 78 jugs fit a 77 engine?
« Reply #2 on: May 01, 2014, 05:01:22 PM »
Nope. I made quite the mess of it to. I"m pretty sure the threads are messed up now.

Offline calj737

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Re: will 78 jugs fit a 77 engine?
« Reply #3 on: May 01, 2014, 05:12:09 PM »
You aren't the first, nor will you be the last. Hopefully someone will chime in with your fitment answer
'74 550 Build http://forums.sohc4.net/index.php?topic=126401.0
'73 500 Build http://forums.sohc4.net/index.php?topic=132935.0

"Of all tyrannies, a tyranny sincerely exercised for the good of it's victim may be the most oppressive. It may be better to live under robber barons than under omnipotent moral busybodies. The robber baron's cruelty may sometimes sleep, his cupidity may at some point be satiated, but those who torment us for our own good will torment us without end for they do so with the approval of their own conscience." - C.S. Lewis

Offline Jerry Rxman Griffin aka MuthaF'er

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Re: will 78 jugs fit a 77 engine?
« Reply #4 on: May 01, 2014, 05:36:25 PM »
Sure  :)
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline SOHC4 Cafe Racer Fan

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Re: will 78 jugs fit a 77 engine?
« Reply #5 on: May 01, 2014, 06:07:52 PM »
77 and 78 engines are compatible with each other.  I am not sure how identical they are to the F Super Sport engines but they are similar. There are some differences between these K7-K8 motors and the K0-K6 engines.
« Last Edit: May 01, 2014, 06:50:50 PM by CB750 Cafe Racer Fan »
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: will 78 jugs fit a 77 engine?
« Reply #6 on: May 01, 2014, 08:11:20 PM »
77/78 K engines are basically F Super Sport engines from 75/76
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)