Engine – Pre-Unit M Group

Part No

Description

Model

Years

GS312

Gasket set M33 1947-60

GS318

Gasket set M20/1 1939-49

GS319

Gasket set M20/1 1950-63

Part No

Description

Per

Model

Years

66-0344

Rocker box top cover M19/22/23/24 1937-40

15-1070

Carburettor, 1″ 1 M10/11 1933

66-0127

Carburettor, 1 1/8 1 M except M24 1937-40

66-9251

Carburettor insulator, 1 1/8 bore 1 M20/21 1949-63

24-1577

Cylinder head 1 M11 1933

66-0090

Cylinder head 1 M20/21 1939-40

66-0058

Cylinder head 1 M20/21 1941-62

66-0068

Cylinder base 1 M19/22/23 1937-38

66-0092

Cylinder base 1 M23 1939-40

66-0068

Cylinder base 1 M22 1939

66-0093

Cylinder base 1 M20/21 1939-63

66-1379

Push rod cover, lower 1 M19/22/23/24/33 1937-60

66-1362

Push rod cover, upper, 5/32 thick 1 M19/22/23 1937

66-1377

Push rod cover, upper, 1/16 thick 1 M19/22/23 1937

66-1378

Push rod cover, upper, 1/32 thick 1 M19/22/23 1937

66-1937

Tappet cover, bottom of push rod tube 1 M23/24/33 1939-57

66-0243

Valve spring cover 1 M20/21 1937-63

66-1909

Timing cover 1 M19/20/21 1937-39

66-1909

Timing cover 1 M22/23/24 1937-38

66-1920

Timing cover 1 M22/3/4 1939

66-1920

Timing cover 1 M 1940-63

65-2618

Oil pump 1 M 1938-63

66-1683

Fibre washer, oil feed union on crankcase 1 M 1937-58

31-8430

Air release valve fibre washer 1 M 1937-63

65-2612

Sump plate 2 M 1937-63
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