Detailed specification

Bearings

Oankcase primary cover Crankshaft Clutch shaft Crankshaft

LHS and RHS outers (Twins)

Cutch drum centre (Triples) Centre main bearings (Triples) Starter freewheel

Outrigger crankshaft (Triples) Camshaft ( x 4) (Twins) Gearbox mainshaft (LHS) (RHS)

5th gear mainshaft (SFC and close-ratio Triple only) Gearbox layshaft (LHS) (RHS)

(Centre)

Upper steering head yoke

Lower steering head yoke Front wheel (Laverda hub) (x2)

32 x 16, needle, NK120/16 (all models) 30 x 16, needle, NK22/16 (all models)

35 x 80 x 21, ball until 1972 (engine no. 10149), 8BDY-35 or 6307NR/C3;

roller, all models 1972 (engine no. 10150), and after,

25 x 32 x 20, needlefcHK25/20 (Twins) 35 x 62 x 9 , needle, (Triples)

20 x 47 x 14, ball, 6204/C3 28 x 68 x 18, ball, 63/28NR/C3 32 x 75 x 20, ball, 63/32NR/C3

20 x 24 x 17 (xl) and 16 x 20 x 13 (x 2) K16/13, needles 20 x 52 17 x 47

x 15, roller, NJ304/C3 x 14, ball until 1972, 63C3NR/C3: 1973 and after, roller NJ303/C3

for Twins and pre-1976 Triples as bush, post 1976 Triples 20 x 24 x 17, needle

25 x 52 x 15, ball, 6205-2RS or ALN25, SFC - 25 x 52 ■ 16.25. taper roller, 30205J2 25 x 52 x 16.25, taper roller, 30205J2 17 x 40 x 12, ball, 6203-2RS or ALN17 i all drum brake mnrtete except SFC)

20 x 42 x 12, ball, (SFC and all disc brake models) i: x 47 x 14, ball, (all wire spc«ie wheels, except SFC) 20 x 47 x 14, ball, (wire wheel 5FC) 20 x 42 x 12, ball, (cast wtaees models) 17 x 47 x 14, balL al models except SFC) 20 x 47 x 14. balL ISPQ 20 x 47 x 16. balL 5204-2RS 17 x 40 x 17.5. boll

25 * 32 = 38 reec-e. (post-1975 Twins & Triples from frame a: 186C 5 Twin, 3352 Triple) NOTE: SKF nomenclature. Basic design. Z = ooe siasidl 2Z = two shields, RS = one seal, 2RS = two seals, N = snap ring groove = ¿rap ring and shield, /C3 = clearance greater than normal

Grimeca chain hubs Grimeca wheel hubs Swing arm bearing ( x 2)

Oil seals

Starter freewheel inner

45

x

80

x

10

oil seal (Twins)

outer oil seal (Twins)

25

x

35

x

7

Starter freewheel oil

35

x

47

x

7

seal (Triples)

Crankshaft contact breaker

20

x

30

x

7

plate oil seal (Twins)

Gearbox main shaft

45

x

60

x

7

sprocket end oil seal

Clutch rod oil seal 6 x 19 x 7

(sprocket end)

Layshaft oil seal 17 x 40 x 7

Camshaft

Profile (Twins)

Camshaft

Profile (Twins)

Profile no.

Date

Model

Cam no. (4010 prefix)

(stamped on cam)

(RH & LH)

8

21. 3.67

GT, GTL, 650

1011, 1012

4/S

26. 2.69

S, SF (before 9.72)

1016, 1015

2/C

19. 1.72

SFC ('72 - '73)

1025, 1026

5/1

20. 4.72

SFl (9.72 - 8.73)

1022, 1021

5/C

21. 7.74

SFC ('74 - '75)

1040, 1041

7/1

4. 7.73

SF2 and SF3 (after 9.73

1029, 1034

6/C

23.10.74

SFC (optional '75)

1047, 1048

Profile (Triples)

A/11

1000, 1200

1071 inlet, 1070 exhaust

A/12

1000 (France, Switzerland

1085 inlet, 1086 exhaust

4/C

3C(E), Jota, Mirage

1082 inlet, 1083 exhaust

7/C

1000 (racing only)*

1166 inlet, 1165 exhaust

NOTE: *Not discussed m this guide. Open class endurance raang ocl;.

NOTE: *Not discussed m this guide. Open class endurance raang ocl;.

Camshaft timing

Profile Open: Close"

8

Inlet

35

62

Exhaust

68

37

4/S

Inlet

60

68

Exhaust

78

45

2/C

Inlet

56

79

Exhaust

72

54

5/1

Inlet

42

74

Exhaust

64

52

5/C

Inlet

52

78

Exhaust

78

47

7/1

Inlet

46

72

Exhaust

64

48

6/C

Inlet

62

88

Exhaust

87

67

A/11

Inlet

46

82

Exhaust

68

56

A/12

Inlet

25

65

Exhaust

52

30

4/C

Inlet

50

74

Exhaust

70

38

7/C

Inlet

55

84

Exhaust

78

61

Inlet open: degrees before TDC, Inlet closed: degrees after BDC, Exhaust open: degrees before BDC, Exhaust close: degrees after TDC

Caahaft tolerances (Triples) Caaahaft 'bearing' diameter (new) Searing internal diameter (new) = —in? clearance (new) maximum wear)

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