The YS 120-SF Engine

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Or go to the chart below to order:

#

Part #

Description

QTY

Price

Purchase

1

YSE0500

Crankcase

1

$137.25

2

YSE0505

Valve Cover

1

$14.75

3

YSE0510

Valve Cover Gasket

1

4

YSE0515

Valve Cover Screws

2

$1.50

5

YSE0520

Head Gasket 

1

$2.50

6

YSE2300

Cylinder Head Assembly

1

$129.95

7

YSE0530

Intake Valve

8

YSE0535

Exhaust Valve (if intake valve is different size)

1

$21.50

9

YSE0540

Valve Spring Set

2

$6.25

10

YSE0545

Spring Retainer Set

2

$6.25

11

YSE0550

C-Ring

2

$3.10

12

YSE0555

Rocker Arm Set

2

$30.95

13

YSE0560

Tappet Adjusting Screw Set

2

$6.25

14

YSE0565

Tappet Lock Nuts

2

$3.10

15

YSE0570

Rocker Arm Shaft

1

$5.50

16

YSE0575

Rocker Arm Shaft Screw

1

$1.50

17

YSE0580

E-Ring Set

2

$2.50

18

YSE0585

Head Screws

5

$4.75

19

YSE0590

Crankshaft    Replaced by #YSE0591

              Works only with new Rear Bearing #YSE0701

1

90.25

20

YSE0595

Cylinder Liner

1

$43.25

21

YSE0600

Piston

1

$43.25

22

YSE0605

Wrist Pin

1

$8.50

23

YSE0610

Wrist Pin Retainer Set

2

$3.10

24

YSE0615

Piston Ring

1

$18.50

25

YSE0620

Connecting Rod

1

$30.75

26

YSE0625

Back Plate

27

YSE0630

Disc Valve

28

YSE0635

Disc Valve Pin

29

YSE0640

Disc Valve Set Screw

30

YSE0645

Back Plate Gasket

1

31

YSE0650

Back Plate Screws

6

$4.75

32

YSE0655

Cam Gear Cover

1

$5.50

33

YSE0660

Cam Gear Cover O-Ring

1

34

YSE0665

Cam Gear Cover Screws

2

$1.50

35

YSE0670

Cam Gear

1

$46.25

36

YSE0675

Cam Followers

2

$12.25

37

YSE0680

Push Rod Set

2

$13.95

38

YSE0685

Push Rod Cover Set

2

$7.75

39

YSE0690

Push Rod Cover O-Ring

4

40

YSE0695

Front Bearing

1

$12.25

41

YSE0700

Rear Bearing  Replaced by #YSE0701

                     Works only with new Crankshaft #YSE0591

1

18.75

42

YSE0705

Cam Gear Bearing Set

2

$12.95

43

YSE0710

Fuel Nipples

4

$9.25

44

YSE0715

Regulator Body

1

$33.95

45

YSE0195

Regulator Adjusting Screw

1

$3.25

46

YSE0725

Regulator Adjusting Screw O-Ring

1

47

YSE0730

Diaphragm

1

$3.10

48

YSE0176

Regulator Plunger

1

$3.10

49

YSE0180

Plunger Spring

1

$1.50

50

YSE0745

Regulator Gasket

1

51

YSE0750

Regulator Screws

2

$1.50

52

YSE0755

Carburetor Body  

53

YSE0760

Throttle Barrel

1

$30.95

54

YSE0765

Needle Valve                              

55

YSE0770

Needle Socket    

56

YSE0775

Needle Socket O-Ring  

57

YSE0385

Needle Valve Detent Spring  

58

YSE0785

Throttle Stop Screw

1

$1.50

59

YSE0790

Throttle Stop Spring

1

$1.50

61

YSE0200

Throttle Arm and Screw

1

$5.50

62

YSE0380

Throttle Barrel Retainer Screw

1

$2.50

63

YSE0810

Carburetor Gasket

1

64

YSE0815

Drive Washer

1

$19.95

65

YSE0820

Shaft Key

1

$3.10

66

YSE0825

Propeller Washer

1

$4.75

67

YSE0830

Propeller Nut Set

2

$7.75

68

YSE0835

Intake Pipe

1

$12.25

69

YSE0840

Intake Pipe O-Ring

4

70

YSE0845

Exhaust Pipe

1

71

YSE0850

Exhaust Pipe Locknut

1

72

YSE0855

Valve Cover Assembly

1

$17.75

73

YSE0860

Rocker Arm Assembly

1

$40.25

74

YSE0865

Cam Gear Cover Assembly

1

$8.50

75

YSE0870

Carburetor Assembly

1

$146.50

77

YSE0880

Throttle Stop Screw Assembly

1

$3.10

78

YSE0885

Drive Washer Set

1

$22.95