Rocker cover NG 350 1936

MikeCrook
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Rocker cover NG 350 1936

Post by MikeCrook »

Anyone have a rocker cover for the above ? I believe the 500cc is the same not sure about WNG. Its the left hand as sitting astride the bike , inlet ?.

I dont mind buying two if it helps.

Thanks
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Roger Gwynn
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Re: Rocker cover NG 350 1936

Post by Roger Gwynn »

Do you mean rocker cover? The 1936 should have 'open' valves with a single rocker box split horizontally enclosing the rocker gear with 2 sheet metal dome cover over the upper ends of the valves. From 1938 there are 2 rocker boxes, an exhaust at the front and an inlet at the rear. No similarity between the 1933-37 version and 1938-58 one. The earlier one had different boxes for the 250/350 and the 500. Have a look in a parts book and see if you can see the parts you need.
Roger Gwynn, Membership Secretary, curator of the Machine Register and the works drawings. Director of Draganfly Motorcycles, Craven Equipment and Supreme Motorcycles mostly retired.
Andy H
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Re: Rocker cover NG 350 1936

Post by Andy H »

You could post a photo to show us what you need.
MikeCrook
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Re: Rocker cover NG 350 1936

Post by MikeCrook »

As you say Roger they are sheet metal domes , part no 85734,A7/413 cover for rocker adjustment.
Thanks .

Mike
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Roger Gwynn
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Re: Rocker cover NG 350 1936

Post by Roger Gwynn »

I am having a conversation with Matthew Gellert is Oz about making these. Awkward little suckers but he says he has a way. Not seen him on the forum so I will ask him about selling in the wider world and let you know.
Roger Gwynn, Membership Secretary, curator of the Machine Register and the works drawings. Director of Draganfly Motorcycles, Craven Equipment and Supreme Motorcycles mostly retired.
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Roger Gwynn
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Re: Rocker cover NG 350 1936

Post by Roger Gwynn »

Just checked with him and it is the inner covers 871-34, not the caps that he is making. Sorry to get your hopes up.
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mark.prizeman
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Re: Rocker cover NG 350 1936

Post by mark.prizeman »

'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
MikeCrook
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Re: Rocker cover NG 350 1936

Post by MikeCrook »

Orderd from drags, problem was not knowing what to call the part.

thanks Roger and Mark .
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Re: Rocker cover NG 350 1936

Post by mark.prizeman »

As an act of marque revenge the Valve spring enclosing caps 871-34 (571-34) can be made from ready chromed BSA bantam plunger shrouds...
'25 Sunbeam 5 sports, '37 VH, '50 Magnat Debon M4, '53 AJS 20
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Roger Gwynn
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Re: Rocker cover NG 350 1936

Post by Roger Gwynn »

The clips to hold these caps on are available from Michael Browne in Oz ambrowne@bigpond.com see https://www.australian-ariel-register.c ... browne.pdf
864-35 and 866-35
Roger Gwynn, Membership Secretary, curator of the Machine Register and the works drawings. Director of Draganfly Motorcycles, Craven Equipment and Supreme Motorcycles mostly retired.
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