Author Topic: Replacement Camshaft & Timing Chain  (Read 3904 times)

0 Members and 2 Guests are viewing this topic.

Offline wpomeroy11

  • Full Member
  • *
  • Posts: 22
  • Turning a $400 Bike into a Housewife
Re: Replacement Camshaft & Timing Chain
« Reply #25 on: January 16, 2016, 06:35:45 AM »
Another update: thanks to you all, I've sourced a cam from a '78 super sport and 2 towers. Got em from Bill Benton.

Offline wpomeroy11

  • Full Member
  • *
  • Posts: 22
  • Turning a $400 Bike into a Housewife
Re: Replacement Camshaft & Timing Chain
« Reply #26 on: February 15, 2016, 09:57:26 AM »
Hey Guys, It's been a little while since my last update, but it turns out that the head is really curiously messed up on that bike. It appears that it was cracked and rewelded at one point. Really interesting , but I sourced a new cylinder head just last week.

My question for this post is regarding the cylinder head: It's out of a 1976 750F. It appears that it'll bolt up perfectly, but I'm concerned that I'll miss an added o-ring or something small that is gonna result in issues down the line. Thoughts?

Offline BPellerine

  • Master
  • *****
  • Posts: 2,222
Re: Replacement Camshaft & Timing Chain
« Reply #27 on: February 15, 2016, 11:23:58 AM »
might want to get the new head surfaced before install,post a pic of the two heads to confirm what they are.billp
1978 CB 750K ard and webers
another anfob

Offline wpomeroy11

  • Full Member
  • *
  • Posts: 22
  • Turning a $400 Bike into a Housewife
Re: Replacement Camshaft & Timing Chain
« Reply #28 on: February 15, 2016, 12:41:09 PM »
I have a straightedge and feeler gauge to check flatness. If it's in spec I won't bother. Ill throw up a couple pics tonight or tomorrow

Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,902
  • Bought her new 4/75
Re: Replacement Camshaft & Timing Chain
« Reply #29 on: February 15, 2016, 01:44:31 PM »
Use case sealer on the 6 rubber pucks and be sure to use 2 o-rings for the oil orifices and TWO MORE for the other 2 'holes' where 2 more might have gone but don't exist. If you take out the cam tower studs be sure to use sealer on the lower threads going into the head.

 
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline BPellerine

  • Master
  • *****
  • Posts: 2,222
Re: Replacement Camshaft & Timing Chain
« Reply #30 on: February 15, 2016, 05:22:53 PM »
I have a straightedge and feeler gauge to check flatness. If it's in spec I won't bother. Ill throw up a couple pics tonight or tomorrow
put the head on the barrels with no head gasket,and then see if you can see light between them,use a flashlight from behind if you have to,both heads I tried this with had bow in the centre,confirmed by the machine shop.billp
1978 CB 750K ard and webers
another anfob