Author Topic: Bottom yoke  (Read 347 times)

Offline Sesman

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Bottom yoke
« on: March 20, 2021, 04:08:05 PM »
Houston I have a problem. :'(

Having assembled my beautifully prepared front end, I think my bottom yoke has a slight twist in the vertical. Basically, with the top yoke in the straight ahead position the right fork leg is kicked forward by about 5mm...possibly more. I know, I know, I should have dry built and checked before moving on.

Do I press on, install the wheels and take it from there or is there a quick and simple way to allay my fears.

My skills, equipment and knowledge are best described as ‘crow-mag on’.


Offline Oddjob

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Re: Bottom yoke
« Reply #1 on: March 20, 2021, 04:14:33 PM »
Did you struggle to get the forks into the top yoke? it might be the fork stanchion that's bent.
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Offline Sesman

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Re: Bottom yoke
« Reply #2 on: March 20, 2021, 04:45:33 PM »
Slipped in with little resistance..oh err.

Just occurred to me to run as flat edge between the underside of both table clamps. There is daylight.

It’s deffo twisted slightly clockwise when viewed fro the rhs...if you see what I mean?.

Know anybody with along bar and blow torch..bugger.

Offline Sesman

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Re: Bottom yoke
« Reply #3 on: March 20, 2021, 04:55:19 PM »
Sorry, meant anticlockwise and hence the forward kick.

What now?

Offline Sesman

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Re: Bottom yoke
« Reply #4 on: March 20, 2021, 06:59:42 PM »
First photo exaggerated for effect.

Second photo attempts to show the distortion.

I reckon a long bar and some heat would sort it.....maybe. Or is it eBay time?


Offline Oddjob

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Re: Bottom yoke
« Reply #5 on: March 20, 2021, 07:01:57 PM »
For me it's E-Bay I'm afraid. I just wouldn't trust it afterwards. Try DK spares.
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Offline Sesman

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Re: Bottom yoke
« Reply #6 on: March 20, 2021, 07:05:31 PM »
Ok, thanks for the advice.

Offline Trigger

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Re: Bottom yoke
« Reply #7 on: March 20, 2021, 07:20:13 PM »
Some do like to bend  :o



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Offline Oddjob

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Re: Bottom yoke
« Reply #8 on: March 20, 2021, 07:41:26 PM »
Looks like it's been in a Limbo contest.
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Offline Sesman

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Re: Bottom yoke
« Reply #9 on: March 20, 2021, 08:15:33 PM »
The original was supplied DK. I’ll give them a call.

Dare I ask, did you straighten that?


Offline Sesman

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Re: Bottom yoke
« Reply #10 on: March 20, 2021, 08:20:01 PM »
Trigger. Just for info, the stem looks good on mine. The daylight in the second photo is the relative gap having placed a flat edge on the opposite stanchion clamp. Do I have a chance of twisting it back....maybe. Or is it scrap value only?

Offline Sesman

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Re: Bottom yoke
« Reply #11 on: March 20, 2021, 08:33:19 PM »
As you predicted. Back to David silver, these bearings are certainly no use as direct replacements.


Offline Sesman

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Re: Bottom yoke
« Reply #12 on: March 20, 2021, 08:54:23 PM »
As you identified in your earlier mail link, If I lower the bottom bearing height by reducing the supplied shim depth to achieve the correct headlamp bracket fit, the bottom yoke would foul the steering stop plate. How very disappointing. Still, with decent headlamp ears in short supply, should we care.....I do.

I suspect though that demand is too low drive a proprietary solution.



Offline Bryanj

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Re: Bottom yoke
« Reply #13 on: March 20, 2021, 10:08:04 PM »
With the 1mm shim i fitted yoke did not foul and brackets were fine.
And if you insist on straightening that yoke a long bar of the correct size to clamp in tightand do it cold as its cast stee
« Last Edit: March 20, 2021, 10:09:54 PM by Bryanj »

Offline Sesman

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Re: Bottom yoke
« Reply #14 on: March 21, 2021, 07:09:54 AM »
Thanks Bryanj.

Ted was kind enough to send me a 1mm shim. Now to set about removing the bottom bearing and shim without ruining the bearing...great. Jury is out on the bottom yoke ‘djustment’ until I’ve spoken to DK.

 

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