A2

YZ250P (5NX1) USA,CANADA

YZ250

(5NX1) SOUTH AFRICA

YZ250

(5NX2) EUROPE

YZ250

(5NX3) JAPAN

YZ250P (5NX4) AUSTRALIA,NEW ZEALAND

2A5NX–100E1

A3

YZ250P/YZ250

PARTS CATALOGUE

E2001 by Yamaha Motor Co., Ltd.

1st Edition, Jul. 2001

All rights reserved.

Any reprinting or unauthorized use

without the written permission of

Yamaha Motor Co., Ltd.

is expressly prohibited.

A4

FOREWORD

A5

This Parts Catalogue is related to the parts for the model(s) in the below frame. When you are

orderingreplacementparts,pleaserefertothisParts Catalogueandquotebothpartnumbersand

part names correctly.

YZ250P(5NX1/5NX4),YZ250(5NX2/5NX3)

1. Modifications or additions which have been made after issue of the Parts

Catalogue will be announced in the Yamaha Parts News.

It is advisable that you make necessary corrections to the Parts Catalogue

according to the Yamaha Parts News.

2. Abbreviations

The Following abbreviations are used in this Parts Catalogue.

“UR” Use specified parts number.

“UN” Use as many as needed.

“AP” Alternate Parts

“LM” Local Made (Parts need to be ordered locally)

“F#” Frame No. (Applicable machine No.)

3. Parts, which are to be supplied in an assembly, are listed with a dot(.) in

front of the part name as shown below.

EXAMPLE

CARBURETOR ASSY

.JET, PILOT

.NOZZLE, MAIN

4. Number of component for assembly

The numeral appearing to the right of each component part indicates the

quantity of parts for each assembly unit.

EXAMPLE

PART NO.

DESCRIPTION

Q’TY

REMARKS

2F5–83310–60

FRONT FLASHER LIGHT ASSY

2

115–83311–60

.BULB (6V–18W)

1

1M1–83309–60

.REFLECTOR

1

5. Applicable colors of graphics are represented in the “REMARKS” as shown

below.

PART NO.

DESCRIPTION

Q’TY

REMARKS

2N4–24110–00–X5 FUEL TANK COMP.

1

MXR

3J1–24240–10

.GRAPHIC, FUEL TANK

1

FOR MXR

6. Applicable Serial No.

Engine Serial No.

Frame Serial No.

7. Note that the illustrations for reference in finding parts numbers, not to be

used for assembling. When assembling, please use the applicable service

manual.

8. The asterisk (*) before a reference number indicates modification items

after the first edition.

MODEL LABEL

A6

(1) A label called “Model Label” is affixed in the location as indicated in (3) below.

When using this parts catalogue, please be sure to cross–refer the “model code –

production code No.” in the catalogue to the “model code – production code No.

“indicated on the Model Label affixed onto the product concemed.

(2) “Model Label”Indication

a: Model Type Code

b: Production Code No.

c: Colouring Type

xxxx – xxx

x

a

b

c

4TW1–010

A

(3) Model Label Affixing Location

(4) Model Code – Production Code Number of Model Listed in This Parts Catalog

Model

Code

Production

Code No.

Country

(destination)

Model

Code

Production

Code No.

Country

(destination)

010

USA

5NX1

020

CANADA

030

SOUTH AFRIKA

010

FRANCE

020

GERMANY

5NX2

030

SPAIN

040

ENGLAND

050

ITALY

5NX3

010

JAPAN

010

AUSTRALIA

5NX4

020

NEW ZEALAND

(5) Colouring Information

Model

Code

Colouring type

code

Colour

code

Colour Name

Abbrevi-

ation

5NX1

5NX2

5NX3

5NX4

A

0583

DEEP PURPLISH BLUE

SOLID E

DPBSE

CONTENTS

ENGINE

CYLINDER HEAD

B2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

GOVERNOR

B4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CRANKSHAFT. PISTON

B5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

WATER PUMP

B6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RADIATOR. HOSE

B7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INTAKE

B8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CARBURETOR

B10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

EXHAUST

B14

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CRANKCASE

B15

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CRANKCASE COVER 1

C2

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STARTER

C3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CLUTCH

C4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TRANSMISSION

C6

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SHIFT CAM. FORK

C8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SHIFT SHAFT

C9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

CHASSIS

FRAME

C10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FENDER

C11

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SIDE COVER

C12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REAR ARM

C13

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REAR SUSPENSION

C15

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STEERING

D3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FRONT FORK

D4

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FUEL TANK

D7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

SEAT

D9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FRONT WHEEL

D10

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

FRONT BRAKE CALIPER

D11

. . . . . . . . . . . . . . . . . . . . . . . . . . . .

REAR WHEEL

D12

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REAR BRAKE CALIPER

D14

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

STEERING HANDLE. CABLE

D15

. . . . . . . . . . . . . . . . . . . . . . . . .

FRONT MASTER CYLINDER

E2

. . . . . . . . . . . . . . . . . . . . . . . . .

STAND. FOOTREST

E3

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

REAR MASTER CYLINDER

E4

. . . . . . . . . . . . . . . . . . . . . . . . . .

GENERATOR

E5

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

HANDLE SWITCH. LEVER

E6

. . . . . . . . . . . . . . . . . . . . . . . . . . .

ELECTRICAL 1

E7

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

ALTERNATE (CHASSIS)

E8

. . . . . . . . . . . . . . . . . . . . . . . . . . . . .

OPTIONAL PARTS 1

E9

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

INDEX

NUMERICAL INDEX

M1

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

B2

FIG.

1

CYLINDER HEAD

1 5MW–11111–01

HEAD, CYLINDER 1

1

1

1

1

2 94702–00326

PLUG, SPARK (NGK BR8EG)

1

1

1

94709–00326

PLUG, SPARK (NGK BR8EG)

1

3 90116–08394

BOLT, STUD

6

6

6

6

4 93604–08071

PIN, DOWEL

2

2

2

2

5 90176–08026

NUT, CROWN

6

6

6

6

6 90201–080L8

WASHER, PLATE

6

6

6

6

7 5MW–11311–00

CYLINDER 1

1

1

1

1

8 5NX–1131D–00

VALVE ASSY

1

1

1

1

9 5CU–1131U–10

HOLDER 3

1

1

1

1

10 90109–05001

BOLT

2

2

2

2

11 5CU–1132A–00

VALVE 2

2

2

2

2

12 5CU–11351–10

GASKET, CYLINDER

1

1

1

1

13 90116–10314

BOLT, STUD

1

1

1

1

14 95617–10660

BOLT, STUD

1

1

1

1

15 90116–10314

BOLT, STUD

1

1

1

1

16 95617–10660

BOLT, STUD

1

1

1

1

17 99590–14016

PIN, DOWEL

2

2

2

2

18 95707–10500

NUT, FLANGE

4

4

4

4

19 93210–74316

O–RING

1

1

1

1

20 93211–02703

O–RING

1

1

1

1

21 5CU–1131E–00

HOLDER 1

1

1

1

1

22 5CU–1131P–00

HOLDER 4

1

1

1

1

23 93210–15639

O–RING

2

2

2

2

24 98507–05012

SCREW, PAN HEAD

4

4

4

4

25 90201–057H5

WASHER, PLATE

2

2

2

2

26 5CU–11830–00

LINK ASSY

1

1

1

1

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B3

FIG.

1

CYLINDER HEAD

27 98907–05012

SCREW, BIND

2

2

2

2

28 93104–08040

OIL SEAL

1

1

1

1

29 5NX–11395–00

HOLDER

1

1

1

1

30 4SS–11832–00

LEVER, LINK

1

1

1

1

31 90508–155B8

SPRING, TORSION

2

2

2

2

32 5MW–1132E–00

PULLEY 1

1

1

1

1

33 5MW–1132F–00

PULLEY 2

1

1

1

1

34 90201–081G0

WASHER, PLATE

2

2

2

2

35 90501–046L6

SPRING, COMPRESSION

2

2

2

2

36 5CU–1131V–00

SHAFT 1

1

1

1

1

37 91317–04008

BOLT

3

3

3

3

38 5CU–11991–00

HOUSING 1

1

1

1

1

39 5CU–11993–00

.GASKET

1

1

1

1

40 97007–05020

BOLT

4

4

4

4

41 92907–05600

WASHER, PLATE

4

4

4

4

42 5CU–11995–00

SEAL, HOUSING

1

1

1

1

43 5CU–1131M–00

COVER

1

1

1

1

44 353–13115–01

CONNECTOR, SUCTION PIPE

1

1

1

1

45 5CU–11354–00

GASKET

1

1

1

1

46 98907–05016

SCREW, BIND

4

4

4

4

47 90445–09777

HOSE (L300)

1

1

1

1

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B4

FIG.

2

GOVERNOR

1 4JY–11915–01

PLATE, THRUST 1

1

1

1

1

2 98907–05012

SCREW, BIND

1

1

1

1

3 90105–05002

BOLT, FLANGE

1

1

1

1

4 90201–057H5

WASHER, PLATE

1

1

1

1

5 90387–085E1

COLLAR

1

1

1

1

6 93104–08040

OIL SEAL

1

1

1

1

7 5CU–11990–00

PUSH ROD ASSY

1

1

1

1

8 3JE–11922–01

FORK, GOVERNOR

1

1

1

1

9 91317–04006

BOLT

2

2

2

2

10 93300–60801

BEARING (B0060)

1

1

1

1

KOYO

11 93300–60801

BEARING (B0060)

1

1

1

1

KOYO

12 5X4–11921–02

SHAFT, GOVERNOR

1

1

1

1

13 5NY–11953–00

GEAR, GOVERNOR

1

1

1

1

14 90501–256L2

SPRING, COMPRESSION

1

1

1

1

15 5CU–11952–00

PLATE

1

1

1

1

16 90201–150U6

WASHER, PLATE

4

4

4

4

17 90387–152F2

COLLAR

1

1

1

1

18 93340–21505

BEARING

2

2

2

2

19 5CU–11912–00

RETAINER, WEIGHT

1

1

1

1

20 5CU–11911–00

RETAINER

1

1

1

1

21 93507–16020

BALL

4

4

4

4

22 93603–14240

PIN, DOWEL

1

1

1

1

23 93604–29184

PIN, DOWEL

1

1

1

1

AP FOR PUSH ROD

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B5

FIG.

3

CRANKSHAFT. PISTON

1 5NX–11631–00–A0

PISTON (STD)

1

1

1

1

UR

5NX–11631–00–B0

PISTON (STD)

1

1

1

1

UR

5NX–11631–00–C0

PISTON (STD)

1

1

1

1

UR

5NX–11631–00–D0

PISTON (STD)

1

1

1

1

UR

2 5CU–11603–10

PISTON RING SET (STD)

1

1

1

1

3 5MW–11633–00

PIN, PISTON

1

1

1

1

4 93450–19052

CIRCLIP

2

2

2

2

5 93310–218A6

BEARING

1

1

1

1

6 5MW–11400–00

CRANKSHAFT ASSY

1

1

1

1

7 5CU–11410–00

.CRANKSHAFT

1

1

1

1

8 5MW–11420–00

.CRANKSHAFT

1

1

1

1

9 5CU–11681–00

.PIN, CRANK 1

1

1

1

1

10 5MW–11651–00

.ROD, CONNECTING

1

1

1

1

11 93310–52406

.BEARING

1

1

1

1

12 90209–24327

.WASHER

2

2

2

2

13 93306–37808

BEARING

1

1

1

1

14 93102–20485

OIL SEAL

1

1

1

1

15 90280–03017

KEY, WOODRUFF

1

1

1

1

16 93306–37808

BEARING

1

1

1

1

17 93102–28004

OIL SEAL

1

1

1

1

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B6

FIG.

4

WATER PUMP

1 5CU–12459–00

GEAR, IMPELLER SHAFT

1

1

1

1

2 5DJ–12451–00

IMPELLER, WATER PUMP

1

1

1

1

3 90201–08512

WASHER, PLATE

1

1

1

1

4 93109–11073

OIL SEAL

1

1

1

1

5 93102–12106

OIL SEAL (SD 12–22–5 HS)

1

1

1

1

6 93306–00105

BEARING (B6001)

1

1

1

1

7 90201–08784

WASHER, PLATE

1

1

1

1

8 99001–06600

CIRCLIP

1

1

1

1

9 5MW–12422–00

COVER, HOUSING

1

1

1

1

10 5CU–12428–00

GASKET, HOUSING COVER 2

1

1

1

1

11 93604–10011

PIN, DOWEL

2

2

2

2

12 90430–06014

GASKET

1

1

1

1

13 95027–06025

BOLT, FLANGE

2

2

2

2

14 95027–06065

BOLT, FLANGE

2

2

2

2

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B7

FIG.

5

RADIATOR. HOSE

1 5NX–1240A–00

RADIATOR ASSY

1

1

1

1

2 91A20–05065

TUBE, FLEXIBLE VINYL

1

1

1

1

3 90467–09006

CLIP

1

1

1

1

4 5NX–12461–00

RADIATOR ASSY

1

1

1

1

5 5HD–12462–00

CAP, RADIATOR

1

1

1

1

6 5CU–12481–00

PIPE 1

1

1

1

1

7 5NY–12482–00

PIPE 2

2

2

2

2

8 5CU–12484–10

PIPE 4

1

1

1

1

9 90450–28014

HOSE CLAMP ASSY

4

4

4

4

10 90450–25037

HOSE CLAMP ASSY

4

4

4

4

11 90480–15528

GROMMET

6

6

6

6

12 90387–0614M

COLLAR

6

6

6

6

13 90119–06038

BOLT, WITH WASHER

6

6

6

6

14 95827–06010

BOLT, FLANGE

2

2

2

2

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B8

FIG.

6

INTAKE

1 5NX–13610–00

REED VALVE ASSY

1

1

1

1

2 5NX–13613–00

.REED, VALVE

2

2

2

2

3 4XL–13616–00

.STOPPER, REED VALVE

2

2

2

2

4 98507–03008

.SCREW, PAN HEAD

4

4

4

4

5 92907–03100

.WASHER

4

4

4

4

6 4XL–13625–00

.SPACER, REED VALVE

1

1

1

1

7 5NX–13624–00

PLATE,REED VALVE

1

1

1

8 5NX–13622–00

GASKET, VALVE SEAT

1

1

1

9 5NX–13565–00

JOINT, CARBURETOR

1

1

1

1

10 91317–06025

BOLT

5

5

5

91317–06020

BOLT

5

11 90464–06214

CLAMP

2

2

2

2

12 90450–51070

HOSE CLAMP ASSY

1

1

1

1

13 90450–70072

HOSE CLAMP ASSY

1

1

1

1

14 5NY–14401–00

AIR CLEANER CASE ASSY

1

1

1

1

15 5NX–14453–00

JOINT, AIR CLEANER 1

1

1

1

1

16 5NY–14459–00

HOLDER, GUIDE

1

1

1

1

17 5NY–14455–00

BAND

1

1

1

1

18 5NY–14442–00

SPACER

1

1

1

1

19 5NY–14417–00

COVER 1

1

1

1

1

20 90267–32070

RIVET, BLIND

3

3

3

3

21 90201–03313

WASHER, PLATE

6

6

6

6

22 4XM–14451–00

ELEMENT, AIR CLEANER

1

1

1

1

23 90209–06096

WASHER

1

1

1

1

24 90122–06035

BOLT, WING

1

1

1

1

25 3JD–14458–01

GUIDE

1

1

1

1

26 90183–06023

NUT, SPRING

4

4

4

4

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B9

FIG.

6

INTAKE

27 90109–067F4

BOLT

4

4

4

4

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4

B10

FIG.

7

CARBURETOR

1 5NX–14101–00

CARBURETOR ASSY 1

1

1

5NX–14101–10

CARBURETOR ASSY 1

1

5NX–14101–20

CARBURETOR ASSY 1

1

2 4JT–14171–00

.PLUNGER, STARTER

1

1

1

1

3 4SR–14985–00

.FLOAT

1

1

1

1

4 4JT–14984–00

.GASKET, FLOAT CHAMBER

1

1

1

1

5 4MX–14115–00

.PLUG, SCREW

1

1

1

1

6 4MX–14561–00

.O–RING

1

1

1

1

7 4MX–14392–00

.VALVE, NEEDLE

1

1

1

1

8 4XL–14146–00

.PLATE

2

2

2

2

9 4MX–14948–07

.JET, SLOW (#50)

1

1

1

STD

4MX–14948–08

.JET, SLOW (#52)

1

STD

4MX–14948–02

.JET, SLOW (#38)

1

1

1

1

AP

4MX–14948–03

.JET, SLOW (#40)

1

1

1

1

AP

4MX–14948–04

.JET, SLOW (#42)

1

1

1

1

AP

4MX–14948–05

.JET, SLOW (#45)

1

1

1

1

AP

4MX–14948–06

.JET, SLOW (#48)

1

1

1

1

AP

4MX–14948–09

.JET, SLOW (#55)

1

1

1

1

AP

4MX–14948–10

.JET, SLOW (#58)

1

1

1

1

AP

4MX–14948–11

.JET, SLOW (#60)

1

1

1

1

AP

4MX–14948–12

.JET, SLOW (#62)

1

1

1

1

AP

4MX–14948–08

.JET, SLOW (#52)

1

1

1

AP

4MX–14948–07

.JET, SLOW (#50)

1

AP

10 4SR–14916–EJ

.NEEDLE (N3EJ)

1

1

STD

4SR–14916–CW

.NEEDLE (N3CW)

1

STD

4SR–14916–EW

.NEEDLE (N3EW)

1

STD

4SR–14916–RW

.NEEDLE (N8RW)

1

1

AP

PART NO.

DESCRIPTION

REMARKS

REF.

NO.

5NX1

5NX2

5NX3

5NX4