Yamaha Ec340e Manual

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·c

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LlT-12618-00-35.

•

YAMAHA

SNOWI081LI

MOTONIIGI

SUPPLEMENTARY

SERVICE

MANUAL

.

8L6-28197-10

)

"\

./

)

~)

)

c

FOREWORD

This supplementary service manual for EC340E has been published

to

supplement the ET340ED supplementary service manual

(8J9

-

28197

-10). For complete

information

on service procedures,

it

is neces-

sary to use this Supplementary Service Manual

together

with

the

following

manuals.

ET340B

Service Manual

(8J8

-

28197

-10)

ET340C Supplementary Service Manual

(8J4-28197

-10)

ET340ED Supplementary Service Manual

(8J9

-

28197

-10)

NOTE:

The Research and Engineering Departments

of

Yamaha are

continually

striving

to

further perfect all models.

Improvements

and

modifications

are

therefore inevitable.

In

light

of

this fact. all specifications

within

this manual are subject

to

change

without

notice.

Information

regarding changes is forwarded

to

all

Authorized Yamaha Dealers

as

soon

as

available.

SERVICE

DEPT.

INTERNATIONAL

DIVISION

YAMAHA

MOTOR

CO.,

LTD.

Particularly

important

information

is distinguished in this manual by the

following

notations:

NOTE:

A NOTE provides key

information

·

to

make procedures

easier

or

clearer.

CAUTION:

A CAUTION indicates special procedures

that

must

be fol-

lowed

to

avoid damage

to

the machine.

WARNING:

A

WARNING

indicates special procedures

that

must

be fol-

lowed

to

avoid injury

to

a machine operator or person in-

specting

or

repairing the machine.

YAMAHA

EC340E

SUPPLEMENTARY

SERVICE

MANUAL

1

st

EDITION,

July

1980

ALL

RIGHTS

RESERVED

BY

YAMAHA

MOTOR

COMPANY,

LTD.,

JAPAN

PRINTED

IN

JAPAN

1981 EC340E

CONTENTS

1.

NEW

SE

RVICE

PROCEDURE

...

.

...

.

..

..........

.

...

.

.....

.

...

.

....

..

...

..

....

..

.

...

..

...

..1

2. SPECIFICATIONS ............

...

..........

...

........

...

..

.....

...

..

...

..

.......

......

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

...

.

..

2

3. WIRE

AND

PIPE ROUTING

DIAGRAM

1.

NEW

SERVICE

PROCEDURE

In servicing the EC340E. there is no particular service procedure

to

be

added

to

that

for the ET340ED.

- 1 -

1981 EC340E

3.

SPECIFICATIONS

NOTE

: *..

...

New

specifica

tion

c General (Compared

with

1980

ET340ED)

Model

EC340

E:

Model:

Model

(1.8.M. No.) * EC340E

(8l6)

c Frame I.D. &

starting

number

*

8l6-06701

Engine I.D. &

starting

number

*

E3

88

-

06701

Dimension:

Overall length

2.555

mm

(100.6

in)

Overall

width

(std)

97

0

mm

(38.2

in)

Overall height

(w/windshield)

1.040

mm

(40.9

in)

c Engine

Description

:

Engine type

Fan

cooled

two-stroke

5-port.

twin

cylinders

Engine

model

E338

Displacement

338

cc

(20.6

cu.in)

Bore X Stroke

60

X

59

.6

mm

(

236

X

2.35

in)

Effective compression ratio

6.5:

1

Starting

system Recoil hand starter and electric starter

Ignition

system

C.D.1.

lubrication

system

"Autolube"

oil

inspection

c Cylinder head:

Combustion

chamber

volume

(with

spark plug)

21.3

cc

(1.30

cu.in)

Compression

chamber

type

Dome

+ Squish

Head gasket

thickne

ss

0.5

mm

(0.02

in)

Cylinder:

Material

Cast

iron

sleeves

aluminum

Bore size

60

mm

(2.362

in)

Taper

limit

0.05

mm

(0.0020

in)

Out

of

round

limit

0.01

mm

(0.0004

in)

..

Piston:

c Piston s

kirt

clearance (Measuring

point)

0.040

~

0.

045

mm

(0.0016

~

0.

0018

in)

(10

mm

from

piston

s

kirt

end)

Pi

s

ton

oversize 1

st

60.25

mm

(2

.3

72

in)

2nd

60.50

mm

(2.382

in)

3rd

60.75

mm

(2.392

in)

4th

61.00

mm

(2.402

in)

Piston

outside

diameter

X length

cP16

X

47

mm

(cPO.630

X

1.85

in)

Piston ring:

Piston ring des

ign

(Top) Keystone

c Piston ring design (2nd) Keys

tone

'Ring

end

gap (installed) (Top)

0.35

~

0.

55

mm

(0.014

~

0.022

in)

. Ring end gap (installed) (2nd) 0

.35

~

0.55

mm

(0.014

~

0.

022

in)

Small end bearing:

Type Needle bearing

c Big end bearing:

Type Needle bearing

Cranks

haft

:

Crankshaft assembly

width

(A)

160

± 0.1

mm

(6.30

±

0.004

in)

-2-

1981

EC340E

Crankshaft assembly

width

(F)

52

~ g05

mm

(2047

~g

002

in)

Crankshaft'

deflection

(D)

0:03

mm

(D-1)

0.04

mm

(D-2)

0.04

mm

(D-3)

0.03

mm

(D-4)

Connecting

rod large

end

side clearance

(C)

0

.

25~0.75

mm

(001O~0.014

in)

Connecting

rod small end defle

ction

(P)

2.0

mm

(0079

in)

---P

Q

D-1

D-4

I J

K~A~~J

Crank pin

outside

diameter

X

length

cjJ22

X

51

mm

(cjJ0866 X

2.008

in)

Crank

type

Solid shaft assembly type,

with

serration

Crank bearing

type

(Left) X

q'ty

#6306

special 1 pc.

Crank bearing

type

(Center) X

q'ty

#6206

special X 2 pcs.

Crank bearing

type

(Right) X

q'ty

#6305

special X 1 pc.

Crank oil seal type (Left) X

q'ty

FPJ

-

30

72

8

2TS

X 1 pc.

Crank oil seal type (Center) X

q'ty

Labyrinth seal X 1 pc.

Crank oil seal

type

(Right) X

q'ty

FPJ-2548

8TS X 1 pc.

Carburetor:

Type &

manufacturer

/

quantity

838

-

34

MIKUNI

X 1 pc.

I.D,

Mark

8J600

Main

jet

(MJ)

#240

Pilot

jet

(PJ)

#75

Pilot

screw

(PS.)

1.0

turns

out

Throttle

valve

(ThV)

#190

Valve seat (V.S.)

cjJ

1.5

mm

(0.059

in)

F

loat

height

25

±1

mm

(0.98

±

0.04

in) ,

Id!ing

engine

speed

1700

r/ m

in

Main

jet

setting

chart.

~

-

30

°C -

20

°C -

10

°C O°C

10

°C

20

C

(-

22

°F) ( - 4 °

F)

(

14

°

F)

(32 °F)

(50

°

F)

(6S0

F)

Altitude I I I I I I

#

220

#2

40

Sea

level (Std)

!--

#2

50

#220

-

600m

12000 h) #2

40

(Std)

.

#220

-

1200m

(4000

ftl

~

~~!~

#210

-

ls00m

(600G h)

#220

_ #

200

_

#200

-

2400m

(

SOOO

ft)

#210

-#190

-

3000m

(

10000ft

)

#190

or more

#200

• Newly changed specification.

- 3 -

c

Lubrication:

Autolube

pump

-

Color

code

Autolube

pump

-

Minimum

stroke

Autolube

pump

-

Maximum

stroke

Autolube

pump

-

Reduction

ratio

Autolube

pump

-

Output

Min./200

strokes

Autolube

pump

-

Output

Max./200

strokes

Autolube

pump

wire

free play

Oil

tank

capaci

ty

Oil grade

Orive and

track

suspension

Transmission:

Type

Drive

ratio

Engagement

rpm

Primary spring:

Part No.

Color

code

Secondary

spring:

Part No.

Color

code

Secondary

spring pre-load

(twist)

Sheave

distance

Sheave

off-set

V-belt

width

and

outer

line

length

V-

belt

wear

limit

Track suspension:

Type

Damper

type

Spring

color

code (Front)·

Spring

color

code (Rear)

Slide

runner

wear

limit

Track

width

Trade

deflection

Length

on

ground

Wheel

sprocket

material

and

number

of

teeth

Stopper

band

length

(Front)

Secondary

drive:

Type

Reduction

ratio

Chain

pitch

X

Number

of

links

Free play

Chain housing oil

quantity

Chain

housing

oil grade

Brake:

Type

Brake pad

thickness

Brake pad

wear

limit

Gap

between

pad

and

disc

White

0.

20

~

0.25

mm

(0.0079

~

0.0098

in)

165

~

1.87

mm

(00657

~

0.

0736

in)

1/

32

0.50

~

0.63

cc

(00169

~

0.

0213

oz)

4.15

~ 4.

70

cc

(0.1403

~

0.1589

oz)

25

± 1

mm

(0.98

±

0.04

in) at idle

2.4 Liter (2.5 US.qt)

YAMALUBE

2-cycle

V-

belt

automatic

centrifugal

engagement

3.5

: 1

~

1 : 1

3000

r/

min

90501

-

50500

Red

90508

-

40080

No

painted

160

0

266

±2

mm

(1047

±

0.08

in)

11

± 1

mm

(043

±

0.04

in)

31.6

X

1.099

mm

(1.24

X

43.3

in)

26

mm

(1.02

in)

Slide rail suspension

Oil and gas

damper

Red

No

painted

10

mm

(0.394

in)

380

mm

(15

in)

25

~

30

mm/l

0 kg

(0.98

~

1.18

in/22

Ib)

760

mm

(29.9

in)

Polyethylene

11

T

186.5

mm

(7.34

in)

(1

st

hole

from

the

bottom)

Chain

(#40K-2)

22

/

13

(1.692)

12.7

mm

(0.5 in) X

60L

+5 +

02

.

10

- 2

mm

(0.4

- 0.

08

In)

400

cc

(13.5

oz)

Gear oil API

·'GL3"

(SAE

#75

or

85)

Disc brake

7.3

mm

(0.287

in)

1.0

mm

(0.04

in)

0.2

~

1.0

mm

(0.008

~

0.039

in)

-4-

1981

EC340E

1981 EC340E

Chassis

Frame:

Material

Aluminum

+ Steel

Steer

ing system:

Caster (ski

column)

25

°

Camber 0 °

Ski l

ength

X

width

X

thickness

980

x

120

x 1.6

mm

(38.6 x

4.7

x

0.06

in)

Ski stance

850

mm

(33.5

in)

Ski

toe

-out o

~

6

mm

(0

~

0.23

mm)

Steering linkage

type

Tie-rod

Lock

to

lock

angle (Ski) Right ski.

L:

27.6

°

R:

24.8

°

Left ski.

L:

24.8

°

R:

27.6°

Lock

to

lock

ang

le (Steering

co

lumn)

Right:

54

.3°

Left:

56.3

°

Front

suspension:

Type Leaf

spring

Damper

type

Oil

damper

Fuel tank:

Capacity

22.7

liter

(6 US. gal)

Fuel grade Regular

gasoline

Electrical

I

gnit

i

on

system:

Type-

flywheel

magneto

(C.D.I. Type)

Model/manufacturer

F3

T

352

/MIT

SU8IS

HI

Voltage

1

2V

Pu

lser coil resistance

90

fl

at

20

°C

(68

°

F)

(White

/Red-8Iack)

Charging coil

re

s

istance

350

fl

at

20

°C

(68

°

F)

(Brown-Black)

Charging

co

il resistance

150fl

at

20

°C

(68

°

F)

(Blue-Black)

Ignition

tim

ing:

B.T.D.C. 1.6 ± 0 1

mm

(006

±

0.004

in)

I

gnition

coil:

M

ode

l/M

a

nufacturer

CM62

-

20/HI

TACHI

'"

YW51/TOYO

DENSO

Spark

gap

9

mm

(OA

in)/300

r/min

<-

11

mm

(06

in)/3.000

r

/min

<-

Primary

winding

resistance 0.1

5fl

at

20

°C

(68°

F) 0

.1

2

fl

at

20°C

(68

°

F)

Secondary

winding

resistance

3.6kfl

at

20

°C

(68°F)

4.

0kfl

at

20

°C (

68

° F)

Diode

(Yes

or

No)

No

<-

Spark plug:

Type &

quant

ity

NGK

BR

-9ES x 2 pcs.

S

park

plug

gap

0

.

7~0.8

mm

(0

.028~0.03

1

in)

Spark plug cap:

Type Rubber type

with

noise s

uppr

essor

Noise

suppressor

re

sis

tance

5.5k

fl

at

20

°C

(68°F)

C.D.

I.

unit:

M

odel/M

a

nufactu

rer

8H4-20/MITSU

BISHI

Starter

motor

type: * NIPPON DENSO

028000

-

7180

Armature

coil resistance *

0.014flat20

°

C(68

°

F)

Field coil resistance

'"

-

Brush length: standard * 12

mm

(OA7 in)

minimum

*

8.5

mm

(0.33

in)

Brush spring pressure *

800

g

(282

oz)

Armature

mica

under

cut

'"

0.6

mm

(0

.023

in)

-5-

1981 EC340E

Battery type:

YUASA

YB

-

14L-2A

Charging rate

1.4

Amps

for

10

Hours

Specific

gravity

1.

28

/

20

°C

(68°

F)

Charging system

Type Flywheel

magneto

Charging coil resistance O.22fl at

20

°C

(68°F)

(White-Black)

Starter relay

switch:

Hitachi A

104-61

Cu

t-

in voltage

6.5V

Winding

resistance

3.0

fl

at

20

°C

(68

°

F)

Rectifier:

Type 1-

element

type (Half wave)

Model/manufacturer

DE5404

/ STANLEY

Capaci

ty

6A

With

stand voltage

400V

Lighting system: .

Lighting

output

12V

-

110W

Lighting

coil

resistance

0.19fl

at

20

°C

(68

°

F)

(Yellow

-Black)

Head li

ght

type Semi

sh

ield

Bulb

wattage/q

'

ty

1

2V

-

60

/

60W

X 1 pc.

Tail/brake

light

wattage

1

2V-8W/23W

A.

C.

voltage regulator:

Model/Manuf

acturer

TRIZ-24B

/HITACHI or

S85

16B/TO

S

HIBA

Voltage

13

.8 ±0.

5V

- 6 -

)

J

)

Yamaha EC340E Manual

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