Author Topic: will 78 jugs fit a 77 engine?  (Read 1324 times)

0 Members and 1 Guest are viewing this topic.

Offline InexperiencedAaron

  • Full Member
  • *
  • Posts: 18
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

  • Really Old Timer ...
  • *******
  • Posts: 21,040
  • I refuse...
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-
'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 InexperiencedAaron

  • Full Member
  • *
  • Posts: 18
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

  • Really Old Timer ...
  • *******
  • Posts: 21,040
  • I refuse...
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

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,912
  • Bought her new 4/75
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

  • Speak up, Whipper-Snapper! I'm a
  • Really Old Timer ...
  • *******
  • Posts: 15,731
  • SOHC/4 Member #1235
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 »
1975 CB550K1 "Blue" Stockish Restomod (http://forums.sohc4.net/index.php?topic=135005.0)
1975 CB550F1 frame/CB650 engine hybrid "The Hot Mess" (http://forums.sohc4.net/index.php/topic,150220.0.html)
2008 Triumph Thruxton (http://forums.sohc4.net/index.php/topic,190956.0.html)
2014 MV Agusta Brutale Dragster 800
2015 Yamaha FZ-09 (http://forums.sohc4.net/index.php/topic,186861.0.html)

"There are some things nobody needs in this world, and a bright-red, hunch-back, warp-speed 900cc cafe racer is one of them — but I want one anyway, and on some days I actually believe I need one.... Being shot out of a cannon will always be better than being squeezed out of a tube. That is why God made fast motorcycles, Bubba." Hunter S. Thompson, Song of the Sausage Creature, Cycle World, March 1995.  (http://www.latexnet.org/~csmith/sausage.html and https://magazine.cycleworld.com/article/1995/3/1/song-of-the-sausage-creature)

Sold/Emeritus
1973 CB750K2 "Bionic Mongrel" (http://forums.sohc4.net/index.php?topic=132734.0) - Sold
1977 CB750K7 "Nine Lives" Restomod (http://forums.sohc4.net/index.php?topic=50490.0) - Sold
2005 RVT1000RR RC51-SP2 "El Diablo" - Sold
2016+ Triumph Thruxton 1200 R (http://forums.sohc4.net/index.php/topic,170198.0.html) - Sold

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,912
  • Bought her new 4/75
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.  ;-)