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Author Topic: Top Yolk  (Read 353 times)

Offline tommo903

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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
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Online florence

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Re: Top Yolk
« Reply #1 on: October 19, 2025, 02:34:48 PM »
I would not attempt to repair that.
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Offline Johnwebley

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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

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lifelong motorcycle rider,and fan

Offline tommo903

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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.
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Offline Bryanj

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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
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Offline DomP

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

Offline Bryanj

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Re: Top Yolk
« Reply #6 on: October 19, 2025, 07:56:52 PM »
Were last time i looked
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Offline DomP

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

Offline Bryanj

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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 »
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Offline AshimotoK0

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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

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“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

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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
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline AshimotoK0

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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  :-[
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“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

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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 😆
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675

Offline Bryanj

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Re: Top Yolk
« Reply #13 on: October 19, 2025, 10:03:38 PM »
Sod off, nearly 20 and i still havent rebuilt No36
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Offline DomP

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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
😀
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1975 XS650B
1976 CB550F1 current project
2012 Triumph Daytona 675
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