« previous next »
Pages: [1] 2   Go Down

Author Topic: Top Yolk  (Read 1686 times)

Offline tommo903

  • Newbie
  • Posts: 7
    • View Profile
Top Yolk
« on: October 19, 2025, 01:35:13 PM »
Hi, bit of a disaster this morning  :(…something I hadn’t spotted previously. I noticed a hair line crack in the top yolk. I loosened the pinch bolt and the inevitable happened…part of the top yolk came away. Just to rub salt in the wound, it’s the same on the other side too.

Im sure this will have happened to others too, so I’m wondering if anyone has had a successful repair carried out, or am I in for another top yolk?

Thanks for any help or recommendations.

Cheers, Steve
Logged

Offline florence

  • SOHC Master
  • Posts: 1305
    • View Profile
Re: Top Yolk
« Reply #1 on: October 19, 2025, 02:34:48 PM »
I would not attempt to repair that.
Logged

Offline Johnwebley

  • SOHC Jedi
  • Posts: 3579
    • View Profile
Re: Top Yolk
« Reply #2 on: October 19, 2025, 02:50:33 PM »
That is what happens if you don't have the D washers/spacers

New yoke needed

Sent from my SM-A546E using Tapatalk

Logged
lifelong motorcycle rider,and fan

Offline tommo903

  • Newbie
  • Posts: 7
    • View Profile
Re: Top Yolk
« Reply #3 on: October 19, 2025, 03:31:04 PM »
Strangely enough, it was the D washers that drew my attention to it. I noticed them in the parts book and wanted to check on my bike to see if they had been fitted. They were fitted, which makes it a bit odd that this has happened. It would seem hard to believe that a PO broke the yolk by missing out the washers, then adding them afterwards.

Thanks anyway, I think you’re right, a new/good used yolk is what’s needed.
Logged

Offline Bryanj

  • Grogu
  • *
  • Posts: 12050
    • View Profile
Re: Top Yolk
« Reply #4 on: October 19, 2025, 07:30:08 PM »
The early pinch bolts are bigger than the later ones and can be grauched up way too tight
Logged

Offline DomP

  • SOHC Master
  • Posts: 1099
    • View Profile
Re: Top Yolk
« Reply #5 on: October 19, 2025, 07:45:51 PM »
Mine is missing these D washers, are they still available?
Logged
1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline Bryanj

  • Grogu
  • *
  • Posts: 12050
    • View Profile
Re: Top Yolk
« Reply #6 on: October 19, 2025, 07:56:52 PM »
Were last time i looked
Logged

Offline DomP

  • SOHC Master
  • Posts: 1099
    • View Profile
Re: Top Yolk
« Reply #7 on: October 19, 2025, 08:07:51 PM »
They aren't listed on CMSNL, not even a part number
Logged
1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline Bryanj

  • Grogu
  • *
  • Posts: 12050
    • View Profile
Re: Top Yolk
« Reply #8 on: October 19, 2025, 08:31:41 PM »
53235300000 same as 750 where it is a D washer and on 500K0/1 where it is a spacer washer
« Last Edit: October 19, 2025, 08:34:35 PM by Bryanj »
Logged

Offline AshimotoK0

  • Grogu
  • *
  • Posts: 7791
  • Mad Scientist.... more power Igor ! Ù©(̾๏̮̮̃̾๏̃̾)Û¶
    • View Profile
Re: Top Yolk
« Reply #9 on: October 19, 2025, 08:46:05 PM »


[ Guests cannot view attachments ]

Here goes ...for your top YOKE I drew it up years ago and it was on here till we lost most of our images GRRR!

Even checked by S.B. Devotion   ......  ;D ;D

Logged
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline DomP

  • SOHC Master
  • Posts: 1099
    • View Profile
Re: Top Yolk
« Reply #10 on: October 19, 2025, 08:48:18 PM »
Ash, I found that just before you posted it.  I could adapt some stainless thick washers surely
Logged
1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline AshimotoK0

  • Grogu
  • *
  • Posts: 7791
  • Mad Scientist.... more power Igor ! Ù©(̾๏̮̮̃̾๏̃̾)Û¶
    • View Profile
Re: Top Yolk
« Reply #11 on: October 19, 2025, 08:50:07 PM »
Quote from: DomP on October 19, 2025, 08:48:18 PM
Ash, I found that just before you posted it.  I could adapt some stainless thick washers surely


yea sure ...can't believe it's nearly 10 years since I did it  :-[
Logged
“Alright friends, you have seen the heavy groups, now you will see morning maniac music. Believe me, yeah. It’s a new dawn.” Grace Slick, Woodstock '69 .. In the year of the Sandcast.

Offline DomP

  • SOHC Master
  • Posts: 1099
    • View Profile
Re: Top Yolk
« Reply #12 on: October 19, 2025, 09:02:01 PM »
Time does fly, 2 years and ive still not got this 550 running properly 😆
Logged
1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline Bryanj

  • Grogu
  • *
  • Posts: 12050
    • View Profile
Re: Top Yolk
« Reply #13 on: October 19, 2025, 10:03:38 PM »
Sod off, nearly 20 and i still havent rebuilt No36
Logged

Offline DomP

  • SOHC Master
  • Posts: 1099
    • View Profile
Re: Top Yolk
« Reply #14 on: October 19, 2025, 10:53:05 PM »
Quote from: Bryanj on October 19, 2025, 10:03:38 PM
Sod off, nearly 20 and i still havent rebuilt No36
😀
Logged
1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675
Pages: [1] 2   Go Up
« previous next »