Exploded view of the YS 63-S Engine in FLASH format
You will need the Macromedia Flash Player (Download FREE) to see the engine parts.  You can then zoom in closer (or back out again) by right-clicking your mouse, and move the image around to see each part and its number.
Then scroll down to the table below to order.

YS 63-S      Refer to the above diagram when choosing your part number

1

YSE5000

YS 63s Crankcase

1

$48.95

2

YSE5005

YS 63s Cylinder Head Assembly

Set

$121.95

3

YSE2810

Intake Valve

$16.25      

4

YSE2815

 Exhaust Valve

1

$14.50

5

YSE2820

 Valve Spring Set

2

$5.75

6

YSE2030

  Spring Retainer Set

2

$5.75

7

YSE2040

 Spring Retainer Clips

4

$5.75

8

YSE5015

 Cylinder Gasket

1

$5.95

10

YSE2840

 Head Screws

4

$4.50

11

YSE2845

 Valve Cover

1

$10.25

12

YSE2850

 Valve Cover Gasket

Available In Set

13

YSE2855

 Valve Cover Screws

2

$3.50

14

YSE2860

 Intake Pipe

1

$12.25

15

YSE2865

 Intake Pipe O Ring

Available In Set

16

YSE4380

 Crank Shaft

1

$59.50

17

YSE2875

 Rear Bearing

1

$13.25

18

YSE2880

 Front Bearing

1

$11.95

19

YSE2885

 Front Bearing Oil Seal

1

$8.75

20

YSE2890

 Drive Washer

1

$13.25

21

YSE2895

  Drive Washer Retainer

1

$4.50

22

YSE0825

 Propeller Washer

1

$4.75

23

YSE0830

 Propeller Nuts

2

$7.75

24

YSE5020

 Piston

1

$42.95

25

YSE4390

 Piston Ring

1

$19.50

26

YSE4395

 Wrist Pin

1

$7.50

27

YSE2925

 Wrist Pin Retainer

2

$5.75

28

YSE2930

 Rocker Arm Set

2

$24.95

29

YSE0560

 Tappet Adjusting Screws

2

$6.25

30

YSE0565

 Tappet Adjusting Lock Nuts

2

$3.10

31

YSE2935

 Rocker Arm Shaft

1

$5.75      

32

YSE2940

 Rocker Arm Screw

1

$3.50

33

YSE0580

 E Ring Set

2

$2.50

34

YSE2945

 Cam Gear

1

$41.95

35

YSE2950

 Cam Gear Cover

1

$5.75

36

YSE2955

 Cam Gear Cover O Ring

Available In Set

37

YSE4400

 Cam Gear Cover Screws

2

$3.50

38

YSE2960

 Cam Gear Bearing Set

2

$16.25

39

YSE2965

 Cam Follower Set

2

$11.75

40

YSE2970

 Push Rods

2

$5.75

41

YSE2975

  Push Rod Covers

2

$7.50

42

YSE2980

  Push Rod Cover O-Ring set

Available in Set

43

YSE2985

 Connecting Rod

1

$17.50

YSE4000

 Back Plate Assembly

1

$47.95

44

YSE2990

 Back Plate

6

$29.95

45

YSE2995

 Disc Valve               In Back Plate Assembly Only

1

46

YSE3000

 Disc Valve Pin

1

$5.75

47

YSE0640

 Disc Valve Retainer Screw

1

$2.00

49

YSE3005

 Back Plate Gasket

Available in Set

50

YSE3010

 Back Plate Screws

2

$3.10

51

YSE3015

 Carburetor Body

1

$30.75

52

YSE3020

 Throttle Barrel

1

$20.50

53

YSE3025

 Throttle Barrel Seal

1

$5.75

54

YSE1090

 Throttle Barrel Retainer

1

$3.10

55

YSE0200

 Throttle Arm w/Screw

1

$5.50

56

YSE0785

 Throttle Stop Screw

1

$1.50

57

YSE0790

 Throttle Stop Spring

1

$7.00

$27.95

58

YSE3030

 Needle Valve

1

$13.25

59

YSE2695

 Needle Valve O-Ring

1

$3.50

60

YSE2700

 Needle Socket

1

$9.95

61

YSE0775

 Needle Socket O-Ring Set

2

$3.10

62

YSE2710

 Needle Valve Detent

1

$4.95

63

YSE3035

 Fuel Nipple

1

$2.50

64

YSE4010

 Low Speed Needle Valve

1

$7.50

65

YSE4015

 Low Speed Needle Valve O Ring

1

$2.50

66

YSE3040

 Carburetor Gasket

Available in Set

67

YSE03045

 Carburetor Screws

1

$4.50

YSE5075

 Regulator Assembly

1

$54.95

68

YSE5025

 Regulator Adjusting Screw

1

$5.95

69

YSE5030

  Regulator Adjusting Screw O Ring

Available in Set

70

YSE5035

 Plunger Spring

1

$5.95

71

YSE5040

 Plunger

1

$4.95

72

YSE5045

 Regulator Body A

1

$19.95

73

YSE5050

 Diaphragm

1

$3.95

74

YSE5055

 Regulator Body B

1

$17.95

75

YSE5060

 Regulator Bracket Set

1

$6.95

76

YSE5065

 Bottom Cover Set

1

$4.95

77

YSE5070

 Bottom Cover Gasket

Available in Set

78

YSE3065

 Muffler Assembly

1

$20.95

79

YSE3070

 Exhaust Header Pipe

1

$5.95

80

YSE3075

 Header Lock Nut

1

$4.50

YSE5080

YS63s Gasket Set

$12.95

YSE5085

YS63s O-Ring Set

$16.95

$7.75