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This is an Exploded View of the YS FZ-91
 

Select your part and click on its number.  The part information will appear at the top of the page,

or you may go directly to the table below for part # and description before ordering.

 

Parts Table for YS 91FZ

#

Part #

Description

 Qty

Price

Purchase

1

YS1570

Crankcase

 1

$42.95
 

2

YS1581

Cylinder Head

 1

$115.50
 

3

YS1590

Intake Valve

 1

$15.75
 

4

YS1600

Exhaust Valve

 1

$14.25
 

5

YS0540

Valve Spring Set

 2

$6.25
 

6

YS2030

Spring Retainer Set

 2

$5.75
 

7

YS2040

Valve Spring Retainer Clips

 4

$5.75
 

8

YS1611

Cylinder Head Gasket

 1

$3.95
 

9

YS1220

Drive Washer Spacer

 1

$3.10
 

10

YS1621

Cylinder Liner

 1

$38.25
 

11

YS1630

Head Screws

 4

$4.25
 

12

YS1640

Valve Cover

 1

$11.50
 

13

YS1650

Valve Cover Gasket (available in set, YSO2020)

 1

 

  

14

YS1660

Valve Cover Screws

 2

$2.95
 

15

YS1670

Rear Air Chamber

 1

$12.95
 

16

YS1680

Air Chamber Gasket (available in set, YSO2020)

 1

 

  

17

YS1690

Air Chamber Screws

 4

$4.25
 

18

YS1700

Air Chamber O-Ring (available in set, YSO2090)

 1

 

  

19

YS4320

Crankshaft

  

$61.25
 

20

YS1720

Rear Bearing

 1

$15.95
 

21

YS0695

Front Bearing

 1

$12.25
 

22

YS1730

Front Bearing Oil Seal

 1

$8.50
 

23

YS4325

Drive Washer

 1

$18.75
 

24

YS4330

Drive Washer Retainer

 1

$5.95
 

25

YS0425

Propeller Washer

 1

$2.50
 

26

YS0830

Propeller Nut Set

 2

$7.75
 

27

YS1760

Piston

 1

$35.95
 

28

YS1770

Piston Ring

 1

$14.25
 

29

YS1780

Wrist Pin

 1

$7.25
 

30

YS0610

Wrist Pin Retainer

 2

$3.10
 

31

YS1790

Rocker Arm Set

 2

$27.50
 

32

YS0560

Tappet Adjusting Screw Set

 2

$6.25
 

33

YS0565

Tappet Lock Nut

 2

$3.10
 

34

YS1800

Rocker Arm Shaft

 1

$7.25
 

35

YS1810

Rocker Arm Screw

 1

$1.50
 

36

YS0580

E-Ring Set

 2

$2.50
 

37

YS0670

Cam Gear

 1

$46.25
 

38

YS1820

Cam Gear Cover

 1

$5.75
 

39

YS1830

Cam Gear Cover O-Ring (available in set, YSO2090)

 1

 

  

40

YS1840

Cam Gear Cover Screws

 2

$2.95
 

41

YS0705

Cam Gear Bearing

 2

$12.95
 

42

YS0675

Cam Follower

 2

$12.25
 

43

YS1850

Push Rods

 2

$5.50
 

44

YS1860

Push Rod Covers

 2

$7.25
 

45

YS0690

Push Rod Cover O-Ring (available in set, YSO2090)

 4

 

  

46

YS1870

Connecting Rod

 1

$20.25
 

47

YS1880

Back Plate

 1

$34.50
 

48

YS1890

Disc Valve

 1

$18.95
 

49

YS1900

Disc Valve Pin

 1

$5.75
 

50

YS1910

 Disc Valve Pin Retainer

 2

$2.95
 

51

YS1920

Disc Valve Pin E-Ring

 1

$1.50
 

52

YS1930

Back Plate Gasket (available in set, YSO2020)

 1

 

  

53

YS1940

Back Plate Screws

 4

$4.25
 

54

YS4305

Carburetor Body

 1

$56.25
 

55

YS4310

Throttle Barrel

 1

$32.95
 

56

YS2050

Low Speed Needle Valve

 1

$8.50
 

57

YS2060

Low Speed Needle Valve O-Ring (available in set, YSO2090)

 1

 

  

58

YS4315

Throttle Barrel Seal

 1

$4.95
 

59

YS1090

Throttle Barrel Retainer

 2

$3.10
 

60

YS0200

Throttle Arm

 2

$5.50
 

61

YS0785

Throttle Stop Screw

 1

$1.50
 

62

YS0790

Throttle Stop Spring

 1

$1.50
 

63

YS2690

Needle Valve

 1

$12.95
 

64

YS2695

Needle Valve O-Ring

 1

$3.50
 

65

YS2700

Needle Seat

 1

$9.95
 

66

YS0775

Needle Seat O-Ring

 1

$3.10
 

67

YS2710

Needle Valve Detent

 1

$4.95
 

68

YS1970

Carburetor Gasket  (available in set, YSO2020)

 1

 

  

69

YS2080

Carburetor Screws

 2

$2.95
 

70

YS1990

 Regulator Body

 1

$34.50
 

71

YS0195

Regulator Adjusting Screw

 1

$3.25