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D1 headlamp bolts ?
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paulkentuk
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August 25, 2019 - 5:52 pm
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I'm looking to source the bolts that fit the captured nuts inside a D1's headlamp shell.

Neither Bournemouth Bantams, Draganfly, or KCM Supplies carry them, which makes me think they maybe BSC threads ?

Worse case I can run a BSF Tap through them, but as the headlamp shell was a rare find anyway its worth me asking first !

Regards

Paul

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sunny
Norfolk
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August 26, 2019 - 8:58 am
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wot  year    D 1  as  some are   1/4  " whit   

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chickensoup
Bolton, Greater Manchester
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August 26, 2019 - 5:00 pm
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Hi Paul,

I had the same problem on My 1950 Lucas electrics D1, the bolt size was 5/16" but I couldn't determine which thread. I ended up running a BSF tap through the shell, buying slightly longer bolts and put a nut on the inside also. Bit belt and braces I know but it's done the job. This topic has raised it head a few times with D1 head light shells.

Hope this helps.... Nick

1950 BSA D1 Plunger   242 UYW

1966 BSA D7  LBF 62 D

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paulkentuk
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August 27, 2019 - 2:45 pm
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chickensoup said
Hi Paul,

I had the same problem on My 1950 Lucas electrics D1, the bolt size was 5/16" but I couldn't determine which thread. I ended up running a BSF tap through the shell, buying slightly longer bolts and put a nut on the inside also. Bit belt and braces I know but it's done the job. This topic has raised it head a few times with D1 head light shells.

Hope this helps.... Nick  

Hi Folk,

So the bike is  a 'Johnny Cash,' i.e. a 48, 49, 50, 51, 52 etc !

The thread size is 1/4" and I've now found a KCM Supplies 'rear mudguard bolt' fits one of the threads. Having offered that up to a 1/4" Tap the thread was clearly BSF.

Lucky  really as the other thread was so corroded it had to be 'cleaned' anyway and both are now BSF without any obvious loss of thread structure.

Thanks for the input.

Paul

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cocorico
Central France
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August 27, 2019 - 3:53 pm
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You may find it worthwhile to buy a thread gauge (Imperial and Metric are both useful) and a ZEUS Table, which contains all sorts of engineering info. You may be able to download one from the web.

1956 D3 running, lights to sort. 7 other bikes in the Barn, 6 runners (when I get time!) and a still in progress Morini 250

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Mick W
Chester/ North Wales Flintshire Border
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August 27, 2019 - 6:08 pm
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If you have an iPhone or tablet try this Hague zues book via this website it takes you to a useful apple app.  Don’t know if they have one for Android

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