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PostPosted: Wed Jul 17, 2019 5:50 pm 
Retro Guru
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Joined: Mon Mar 02, 2009 4:22 pm
Posts: 1691
The frame number is similar to a Sun frame number with the two letters followed by numbers. E-prefix would put it 1938/1939. It may be worth trawling the early Sun catalogues to see if it matches e.g. http://threespeedhub.com/wp-content/upl ... 938-UK.pdf

More on dating Sun and Parkes frames here: viewtopic.php?f=12&t=344162


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 Post subject: Re:
PostPosted: Wed Jul 17, 2019 10:04 pm 
Dirt Disciple

Joined: Mon May 22, 2017 6:25 pm
Posts: 21
Here are a few more photos of the bike mocked up, with some Mcguiver standard badges to get the brakes working https://photos.app.goo.gl/pwxTF8Wbzh354hjf8


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PostPosted: Thu Jul 18, 2019 1:20 pm 
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^ From those pics, it looks a little backward to be a late 30s Sun, but it could be a Club or Sports model or any of their non racy models going on the forks.

That's not a headclip headset btw, it's a roadster headset with a tall locking nut.

Personally, I think the clamp-on brakes might be a red herring. I don't think they belong with the bike.


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 Post subject: Re:
PostPosted: Thu Jul 18, 2019 7:36 pm 
Dirt Disciple

Joined: Mon May 22, 2017 6:25 pm
Posts: 21
Useful.info. does a roadster headset have the same bearing race arrangement as the clip type? I had assumed that it was a modified clip headset. I'm not sure about the Sun angle, though some of the models look very similar. The shadow left by the headbadge clearly shows a crown, and probably some kind of a a scroll at the bottom. I'm thinking maybe an Imperial, as that is the closest headbadge design I've seen.


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PostPosted: Sun Jul 21, 2019 2:24 pm 
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Joined: Mon Mar 02, 2009 4:22 pm
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The thread size, race diameter and ball bearing size is the same. What will give it away is if there’s a slot or a tongue cut all the way through the steerer to allow the head clip to grip the stem. Steerers for a conventional headset won’t have this, they’ll just have the shallow groove for the tab on the lock washer.


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 Post subject: Re:
PostPosted: Sun Aug 04, 2019 9:28 am 
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Joined: Sun Aug 22, 2010 7:07 pm
Posts: 1600
Location: Cotswolds
Apart from a few typically Raleigh top bikes early post war the head clip was 31/32 inch with about 1/2 inch thread 56 tpi. The fork column would have a vertical slot and two horizontal slots to allow the head clip to grip. The top ball race was normally 1/8 balls. The top head lug would accept a loose bearing cup of the type used by millions of roadster bikes.

Keith


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