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A technical forum for all single cylinder Nortons

Vintage carb

Forums

I have the chance to purchase a  brand new complete  boxed Bowden sports carb with  factory literature and new spares  .  I think its around 1" bore (not sure) . I'm interested mainly to stop it finishing in a skip  with garage contents.   I know that Works racers were fitted with Bowdens around 1936 but these would have been larger I think.  Any other  Norton use of Bowden carb that we know off?.

Lubrication in '61 ES2

Forums

I suspect my newly rebuilt ES2 has an oil flow problem.

It was rebuilt with an overhauled oil pump, new spring and plunger in the timing cover. It was resleeved and of course new bearings and gaskets throughout.

The crankshaft was not split, big end bearings were fine.

Oil flows back to the oil tank, there is very little wet sumping.

Oil oozes out of the connection to the valve gear at the head, more slowly than I would have expected.

16h barrel honing

Forums

I am rebuilding a pre war 16h on a standard bore and thinking I should hone the bore? Can anybody please suggest a good drill attachment honing tool and what size I would need?

 Thanks 

Gary

Carb retaining nuts

Forums

Despite research I can't find details of the carb retaining nuts for a monobloc 376/017.

Mine have gone walk-about. I believe they should be nylon insert tye but don't have details of the size/thread. Help!

George

Jet sizes for 930 concentric on a 37 inter MS

Forums

I’ve lost patience with the poor starting of the inter and seek to eliminate different elements.  I have a 930 concentric but it’s not jetted anything like the TT. Can anyone running this set up give me a starting point on jets?   The tt is 109 / 320 with No 7 cutaway.

The 930 max slide is 5 cutaway but that should not affect starts.  Replaceable pilot jet also so that’s a newly for me.  if I can have a base set up from one of you I can then get running and bedded down.   

 Many thanks

 

Jon

Plunger framed ES2 rear brake plate

Forums

Hi all,

I’ve just put a wanted advert on the NOC site for a plunger framed ES2 rear brake plate. But out of interest I wonder if any one can tell me the differences between this brake plate and a Commando.

I am told the pressing is the same but the fittings are different, if so, does any one have details of these. If I can’t get an original one I could possibly modify a Commando one?

Many thanks,

Phil Norris

 

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