Air filters

Air filters were initially offered for use in ‘Colonial’ countries, a quaint euphemism for dusty foreign places, mainly owned by the late lamented Great British Empire. These are rarely seen. Some contracts of W/NG were specified with an air filter mounted on the top of the petrol tank. In 1954 all models were fitted with an air filter as standard, a ‘pancake’ type was fitted to the SU carburetter on the SU and the swinging arm models were fitted with a filter made by Burgess, the silencer people, The MKI HS used a modified oil tank as they were too butch for a tool box, the oil tank was positioned in its’ place. Although there are two variants of the swinging arm filter they are interchangeable however they do differ in the shape of the cut-outs for the rubber for the type 6 and Monobloc carburetters and for each model.
The standard after market pancake filters are an acceptable substitute until we manage to find someone to make the proper things for less than a king’s ransom.

Part Number

Description

Model

Years

9001-52

Air filter rubber NH, VH 1952-53

9001-55

Air filter rubber NH 1955-58

9004-55

Air filter rubber FH 1955-58

9005-55

Air filter rubber VH,HSI,HT 1955-58

9010-54

Spring garter for air filter rubber S/arm 1954

9010-55

Spring garter for air filter rubber S/arm 1955-58

9020C-54

Air filter, super quality, does not include element MK II 1954-58

9020-54

Air filter element, not the proper thing but fits OK MK II 1954-58

9021-54

Rubber pipe, air filter to carburetter MK II 1954-58

9025-55

Air filter rubber KH 1955-58

9026-56

Air filter rubber (latterly known as rocking horse manure) HS MKI 1956-58

29/110

Adapter ring, screws onto thread on rear of carburetter 289/375

376/110

Adapter ring, screws onto thread on rear of carburetter 376/600

PA-11

Pancake air filter, central fixing, screw on 376

PA-12

Pancake air filter, offset mounting, clamp on, requires PA-10 376

389/110

Adapter ring, screws onto thread on rear of carburetter 389

PA-14

Pancake air filter, central fixing, screw on 389

PA-15

Pancake air filter, offset mounting, clamp on, requires PA-13 389

PA-16

Adapter ring, screws onto thread on rear of carburetter 900

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