Author Topic: New Guy Here  (Read 5395 times)

0 Members and 1 Guest are viewing this topic.

Offline summitwrx

  • Full Member
  • *
  • Posts: 29
Re: New Guy Here
« Reply #25 on: September 09, 2014, 03:50:07 PM »
The only marking on my head says "on14".
Having a heck of a time finding anyone that carries pistons, valves, and cam bearings. Maybe I should just buy a 750 and swap it in if there are no fitment issues.

Offline seanbarney41

  • not really that much younger than an
  • Really Old Timer ...
  • *******
  • Posts: 10,921
Re: New Guy Here
« Reply #26 on: September 09, 2014, 05:47:39 PM »
I would not spend another dime on that motor. :'(
If it works good, it looks good...

Offline summitwrx

  • Full Member
  • *
  • Posts: 29
Re: New Guy Here
« Reply #27 on: September 09, 2014, 06:37:28 PM »
seanbarney41 Sarcasm?

Offline seanbarney41

  • not really that much younger than an
  • Really Old Timer ...
  • *******
  • Posts: 10,921
Re: New Guy Here
« Reply #28 on: September 09, 2014, 07:01:04 PM »
absolutely not...that motor is ruined.  Find another one...one of the worst bases for a project I have ever seen on the interwebs or the real world...just my opinion and my advice to you
If it works good, it looks good...

Offline summitwrx

  • Full Member
  • *
  • Posts: 29
Re: New Guy Here
« Reply #29 on: September 09, 2014, 07:48:24 PM »
So far the bottom end looks clean. Im hoping to find a good price on a big bore kit, machining the jugs it has now, and replacing the head with a used and then re-seated head. Though it would be nice to find a full motor for the right price...

Offline summitwrx

  • Full Member
  • *
  • Posts: 29

Offline summitwrx

  • Full Member
  • *
  • Posts: 29
Re: New Guy Here
« Reply #31 on: September 10, 2014, 12:43:10 PM »
I found a very clean top end from a 1980 cb650c,(my bike is 1981, made in 79, cb650c) where intake runners different dimensions, should my cv carbs fit the head?
Ive read there are 2 different heads in the same era for the different carbs...

Offline summitwrx

  • Full Member
  • *
  • Posts: 29
Re: New Guy Here
« Reply #32 on: September 11, 2014, 01:31:53 PM »
Got a new head, unfortunately it won't line up with the carbs. Can I use sightly longer rubber boots to make them fit?


The head that came on the bike has this in nearly every hole, they drilled them out and put a spring like material. More than half of them are toast and won't work.


Offline Jerry Rxman Griffin aka MuthaF'er

  • This MuthaF'er is getting to be a
  • Really Old Timer ...
  • *******
  • Posts: 14,938
  • Bought her new 4/75
Re: New Guy Here
« Reply #33 on: September 11, 2014, 04:28:43 PM »
Don't take this personal but you need some help. Have you tried to get in touch with CB650? aka Terry, he lives in Hudson, just up I-76. He knows 650's inside and out and probably has some needed parts. Good guy too  ;D
As of today 3/13/2012 my original owner 75 CB750F has made it through 3 wives, er EX-wives. Free at last.  ;-)

Offline summitwrx

  • Full Member
  • *
  • Posts: 29
Re: New Guy Here
« Reply #34 on: September 11, 2014, 07:52:17 PM »
Not taken personally at all...I'm on this forum for that reason; help. I do appreciate all the help I've received from the members on here!

Figured out these are heli coils, I bought a heli coil kit and am going to re-heli coil the bad threaded holes.

I don't think the 650s had actually journal bearings as the three bikes I tore into at the salvage yard didn't have bearings, the journals on the head are just machined smooth for the camshaft.


Offline summitwrx

  • Full Member
  • *
  • Posts: 29
Re: New Guy Here
« Reply #35 on: September 21, 2014, 10:08:17 PM »
A little update: I have been pretty busy lately but found time to put new rings, cleaned everything up, new base and head gaskets, all new valves and reseated them, got the top end all together except for the rockers covers.

Wrapped the exhaust in black heat wrap, went to put it on tonight but was pretty worn out a didn't want to struggle with it too long, kind of annoying to hold the crush washers in and line everything up when you're tired.

Need to get a new oil pan seal, and the seal that goes on the shifter shaft.Hoping to have it running in the next week or so!