Yamaha EC340E Manuel

·c

c ..

LlT-12618-00-35.

•

YAMAHA

SNOWI081LI

MOTONIIGI

SUPPLEMENTARY

SERVICE

MANUAL

8L6-28197-10

)

FOREWORD

This supplementary service manual for EC340E has been published

supplement the ET340ED supplementary service manual

(8J9

28197

-10). For complete

information

on service procedures,

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

Yamaha are

continually

striving

further perfect all models.

Improvements

and

modifications

are

therefore inevitable.

light

this fact. all specifications

within

this manual are subject

change

without

notice.

Information

regarding changes is forwarded

all

Authorized Yamaha Dealers

soon

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

make procedures

easier

clearer.

CAUTION:

A CAUTION indicates special procedures

that

must

be fol-

lowed

avoid damage

the machine.

WARNING:

WARNING

indicates special procedures

that

must

be fol-

lowed

avoid injury

a machine operator or person in-

specting

repairing the machine.

YAMAHA

EC340E

SUPPLEMENTARY

SERVICE

MANUAL

EDITION,

July

1980

ALL

RIGHTS

RESERVED

YAMAHA

MOTOR

COMPANY,

LTD.,

JAPAN

PRINTED

JAPAN

1981 EC340E

CONTENTS

NEW

RVICE

PROCEDURE

...

..........

...

.....

...

....

...

....

...

..1

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

...

..........

...

........

...

.....

...

.......

......

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

...

3. WIRE

AND

PIPE ROUTING

DIAGRAM

NEW

SERVICE

PROCEDURE

In servicing the EC340E. there is no particular service procedure

added

that

for the ET340ED.

- 1 -

1981 EC340E

SPECIFICATIONS

NOTE

: *..

...

New

specifica

tion

c General (Compared

with

1980

ET340ED)

Model

EC340

Model:

Model

(1.8.M. No.) * EC340E

(8l6)

c Frame I.D. &

starting

number

8l6-06701

Engine I.D. &

starting

number

06701

Dimension:

Overall length

2.555

(100.6

in)

Overall

width

(std)

(38.2

in)

Overall height

(w/windshield)

1.040

(40.9

in)

c Engine

Description

Engine type

Fan

cooled

two-stroke

5-port.

twin

cylinders

Engine

model

E338

Displacement

338

(20.6

cu.in)

Bore X Stroke

(

236

2.35

in)

Effective compression ratio

6.5:

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

(1.30

cu.in)

Compression

chamber

type

Dome

+ Squish

Head gasket

thickne

0.5

(0.02

in)

Cylinder:

Material

Cast

iron

sleeves

aluminum

Bore size

(2.362

in)

Taper

limit

0.05

(0.0020

in)

Out

round

limit

0.01

(0.0004

in)

Piston:

c Piston s

kirt

clearance (Measuring

point)

0.040

045

(0.0016

0018

in)

(10

from

piston

kirt

end)

ton

oversize 1

60.25

in)

2nd

60.50

(2.382

in)

3rd

60.75

(2.392

in)

4th

61.00

(2.402

in)

Piston

outside

diameter

X length

cP16

(cPO.630

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

(0.014

0.022

in)

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

.35

0.55

(0.014

022

in)

Small end bearing:

Type Needle bearing

c Big end bearing:

Type Needle bearing

Cranks

haft

Crankshaft assembly

width

(A)

160

± 0.1

(6.30

0.004

in)

-2-

1981

EC340E

Crankshaft assembly

width

(F)

~ g05

(2047

002

in)

Crankshaft'

deflection

(D)

0:03

(D-1)

0.04

(D-2)

0.04

(D-3)

0.03

(D-4)

Connecting

rod large

end

side clearance

(C)

25~0.75

(001O~0.014

in)

Connecting

rod small end defle

ction

(P)

2.0

(0079

in)

---P

D-1

D-4

I J

K~A~~J

Crank pin

outside

diameter

length

cjJ22

(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

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

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

(0.059

in)

loat

height

±1

(0.98

0.04

in) ,

Id!ing

engine

speed

1700

r/ m

Main

jet

setting

chart.

°C -

°C O°C

°C

°F) ( - 4 °

(

(32 °F)

(50

(6S0

Altitude I I I I I I

220

Sea

level (Std)

!--

#220

600m

12000 h) #2

(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 -

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

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

ground

Wheel

sprocket

material

and

number

teeth

Stopper

band

length

(Front)

Secondary

drive:

Type

Reduction

ratio

Chain

pitch

Number

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

0.25

(0.0079

0.0098

in)

165

1.87

(00657

0736

in)

0.50

0.63

(00169

0213

oz)

4.15

~ 4.

(0.1403

0.1589

oz)

± 1

(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

min

90501

50500

Red

90508

40080

painted

160

266

±2

(1047

0.08

in)

± 1

(043

0.04

in)

31.6

1.099

(1.24

43.3

in)

(1.02

in)

Slide rail suspension

Oil and gas

damper

Red

painted

(0.394

in)

380

(15

in)

mm/l

0 kg

(0.98

1.18

in/22

Ib)

760

(29.9

in)

Polyethylene

186.5

(7.34

in)

hole

from

the

bottom)

Chain

(#40K-2)

(1.692)

12.7

(0.5 in) X

60L

+5 +

- 2

(0.4

- 0.

In)

400

(13.5

oz)

Gear oil API

·'GL3"

(SAE

#75

85)

Disc brake

7.3

(0.287

in)

1.0

(0.04

in)

0.2

1.0

(0.008

0.039

in)

-4-

1981

EC340E

1981 EC340E

Chassis

Frame:

Material

Aluminum

+ Steel

Steer

ing system:

Caster (ski

column)

Camber 0 °

Ski l

ength

width

thickness

980

120

x 1.6

(38.6 x

4.7

0.06

in)

Ski stance

850

(33.5

in)

Ski

toe

-out o

0.23

mm)

Steering linkage

type

Tie-rod

Lock

lock

angle (Ski) Right ski.

27.6

24.8

Left ski.

24.8

27.6°

Lock

lock

ang

le (Steering

lumn)

Right:

.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

gnit

system:

Type-

flywheel

magneto

(C.D.I. Type)

Model/manufacturer

352

/MIT

SU8IS

Voltage

lser coil resistance

°C

(68

(White

/Red-8Iack)

Charging coil

istance

350

°C

(68

(Brown-Black)

Charging

il resistance

150fl

°C

(68

(Blue-Black)

Ignition

tim

ing:

B.T.D.C. 1.6 ± 0 1

(006

0.004

in)

gnition

coil:

ode

l/M

nufacturer

CM62

20/HI

TACHI

YW51/TOYO

DENSO

Spark

gap

(OA

in)/300

r/min

(06

in)/3.000

/min

Primary

winding

resistance 0.1

5fl

°C

(68°

F) 0

20°C

(68

Secondary

winding

resistance

3.6kfl

°C

(68°F)

0kfl

°C (

° F)

Diode

(Yes

No)

Spark plug:

Type &

quant

ity

NGK

-9ES x 2 pcs.

park

plug

gap

7~0.8

.028~0.03

in)

Spark plug cap:

Type Rubber type

with

noise s

uppr

essor

Noise

suppressor

sis

tance

5.5k

°C

(68°F)

C.D.

unit:

odel/M

nufactu

rer

8H4-20/MITSU

BISHI

Starter

motor

type: * NIPPON DENSO

028000

7180

Armature

coil resistance *

0.014flat20

C(68

Field coil resistance

Brush length: standard * 12

(OA7 in)

minimum

8.5

(0.33

in)

Brush spring pressure *

800

(282

oz)

Armature

mica

under

cut

0.6

.023

in)

-5-

1981 EC340E

Battery type:

YUASA

14L-2A

Charging rate

1.4

Amps

for

Hours

Specific

gravity

°C

(68°

Charging system

Type Flywheel

magneto

Charging coil resistance O.22fl at

°C

(68°F)

(White-Black)

Starter relay

switch:

Hitachi A

104-61

in voltage

6.5V

Winding

resistance

3.0

°C

(68

Rectifier:

Type 1-

element

type (Half wave)

Model/manufacturer

DE5404

/ STANLEY

Capaci

With

stand voltage

400V

Lighting system: .

Lighting

output

12V

110W

Lighting

coil

resistance

0.19fl

°C

(68

(Yellow

-Black)

Head li

ght

type Semi

ield

Bulb

wattage/q

60W

X 1 pc.

Tail/brake

light

wattage

2V-8W/23W

voltage regulator:

Model/Manuf

acturer

TRIZ-24B

/HITACHI or

S85

16B/TO

HIBA

Voltage

.8 ±0.

- 6 -

)

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