Author Topic: Is this cam toast?  (Read 1575 times)

0 Members and 1 Guest are viewing this topic.

Offline Scott S

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 8,232
Is this cam toast?
« on: August 30, 2016, 05:55:32 AM »
 Three of the four lobes on my CL350 cam have pitting, one pretty badly. One of the rockers does as well. Is this cam toast?



'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline ekpent

  • Really Old Timer ...
  • *******
  • Posts: 13,512
  • To many bikes-but lookin' for more
Re: Is this cam toast?
« Reply #1 on: August 30, 2016, 06:21:06 AM »
 Think we know what the gurus are going to say-- " Do you want jelly or peanut butter on that toast ?"

Offline simon#42

  • Old Timer
  • ******
  • Posts: 2,590
  • liverpool
Re: Is this cam toast?
« Reply #2 on: August 30, 2016, 11:01:28 AM »
you could get it hard welded but unless its a special cam it would be better and cheaper to find another .
im surprised you asked the question to be honest

Offline Scott S

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 8,232
Re: Is this cam toast?
« Reply #3 on: August 30, 2016, 11:46:31 AM »
 Yeah, when I saw the pics in close up it was pretty obvious. Especially the first one. The other two I can't even really snag a fingernail on.
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline Don R

  • My Sandcast is a
  • Really Old Timer ...
  • *******
  • Posts: 19,905
  • Saver of unloved motorcycles.
Re: Is this cam toast?
« Reply #4 on: August 30, 2016, 08:22:04 PM »
Holy wow, junk em
No matter how many times you paint over a shadow, it's still there.
 CEO at the no kill motorcycle shop.
 You don't need a weatherman to know which way the wind blows.

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,058
Re: Is this cam toast?
« Reply #5 on: August 30, 2016, 09:56:42 PM »
If you are stuck, or waiting to find a racing cam..
After you get over the shock of that costing 1.5 x what a cam for a 4 costs..
I would blocksand it to clean it up.....
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline Scott S

  • Global Moderator
  • Really Old Timer ...
  • *****
  • Posts: 8,232
Re: Is this cam toast?
« Reply #6 on: August 31, 2016, 02:05:17 AM »
 You know, even the factory manual says to use a soap stone to clean up any imperfections. That's so weird to hear, to me.
'71 CB500 K0
'17 Triumph Street Scrambler
'81 Yamaha XS650

Offline 754

  • Really Old Timer ...
  • *******
  • Posts: 29,058
Re: Is this cam toast?
« Reply #7 on: August 31, 2016, 07:31:06 AM »
On really old stuff, from the thirties and older, parts are often like that...and still expensive, if they are halfway like that..
 So it often ends up getting used while you try to find better..
My buddy that has many 1902-1930 bikes said it best..
 ....its oil rentention marks.....!!
I know early 350 cams and rockers are tough to find but later should be cheap.
Maker of the WELDLESS 750 Frame Kit
dodogas99@gmail.com
Kelowna B.C.       Canada

My next bike will be a ..ANFOB.....

It's All part of the ADVENTURE...

73 836cc.. Green, had it for 3 decades!!
Lost quite a few CB 750's along the way

Offline RAFster122s

  • I feel like a really really
  • Really Old Timer ...
  • *******
  • Posts: 12,365
  • SOHC4 member # 2605
Re: Is this cam toast?
« Reply #8 on: September 30, 2016, 11:31:47 AM »
If you hardweld the cam you will have to hardweld the rovckers or they will be toast too in no time, even if $$ NOS new units will get ruined
David- back in the desert SW!

Offline HondaMan

  • Someone took this pic of me before I became a
  • Really Old Timer ...
  • *******
  • Posts: 13,839
  • ...not my choice, I was nicknamed...
    • Getting 'em Back on the Road
Re: Is this cam toast?
« Reply #9 on: October 02, 2016, 01:18:49 PM »
You may be able to send it to Megacycle and have them both repair it and 'pep it up' a bit: the pre-1972 cams are higher RPM cams than the post-1971 versions, too. But, the later ones tour with 2 aboard MUCH more easily! :)
I had some of both.
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com