Yamaha ET340ED Manual

LIT -12618-00-25
• YAMAHA
81MMDBIlE
SUPPLEMENTARY
SERVICE l
[Frame serial number: 8J9-040101
~ 8J9-049999 ]
Engine serial number: E338-040101
~ E338-049999
8J9-28197-10

CONTENTS
1. NEW SERVICE PROCEDURE ........... .... .... ........ .. .. .. . .. ...............................
2.
MAINTENANCE INTERVALS .. ....................... .. ........................................ 2
3. SPECiFiCATIONS
... .. .......... .. ... ... .... . .. ............... .... . .... . .. .......... ..... ........... .... 4
4. SPECIAL TOOLS..............................................
.. .......... .. ........................ ..... 10
5. WI RING DIAGRAM .... ........... .. ........................ .... ........... ... .. ............ .... ... .... 11
6. WI RE AND PIPE ROUTING DIAGRAM .. .. ...... .. ............ .. " ........... .. ......... 12
1. NEW SERVICE PROCEDURE
(New service procedure applied to the 1980 ET340ED)
Carburetor
1. To achieve the precise fitting of the
main nozzle,
the main nozzle is press-
fitted to the mixing chamber body, and
accordingly the main nozzle cannot be
removed.
1980 ET340ED
2. For better performance, th e recom-
mended
type of the main jet which is
more effective at
altitudes is changed.
[M ain jet setting chart]
~
- 30 °C -20 °C -10 °C ooe
1Q oe
20 °C
( -22 ° F) (- 4° F) (14° F) (32° F)
(50 ° F) (68° F)
Altitude
I I I I I I
..
#220
# 240
Sea level
..
(Std)
..
#2 50
..
..
# 220
~ 600m ( 2000 ft)
# 240
(Std)
..
.
#220
..
~ 1 200m (4000 ft)
r-.- #240
# 210
.. ..
(Std) *
.
#210
..
~ 1800m (6000 ft)
* #200_
#220
..
..
*
..
# 200
~ 2400m (8000 ft)
#210
-
--#190
~ 3000m (10000 ft) --
#190
or more
#200
..
* Newly changed specification.
- 1 -

1980 ET340ED
2. MAINTENANCE INTERVALS
[PERIOorc MAINTENANCE]
Check point
20 hrs. or
400km
(250 mi)
ENGINE
Tightness
of bolts and nuts a
Bends. cracks and wear
a
Abnormal noise a
Loose connection and breaks of fuel and pulse pipes a
Loose connection and breaks of oil pipes a
Loose connact ion and breaks of oil delivery pipe a
Manual rope starter system
Carburetor
•
Operation of starter jet
•
Mixing adjuster (pilot scr ew)
•
Idling speed adjustment
Operation and adjus tm ent of oil pump
I gnition timing
Cylinder comp ressions
Cylin der head/exhaus t pipe decarbonize
Spark plug co n ditio n. gap and cleaning a
Tightening of the cylinder head--
DRIVE:
Tightness of bolts and nuts a
We ar on slide runners a
Pr imary drive system
V-belt a
Secondary drive system
Sheave distance
Sheave offset
Brake pad wear
Brake operation and adjustment
Guide wheel rubber
Wear of drive track wheel sprocket
Drive track
adjustment
Breaks in drive track
Bends in front and rear axles
Checking of lock washers
Drive chain adjustment
Drive chain oil level
BODY:
Tightness of bolts and nuts
a
Bends and cracks a
Welded riveted. joints
a
Ski adjust ment
Ski runner wear
a
Breaks in fuel tank
Cleaning of fuel tank
Fuel filter
Loose connection and breaks in fuel pipe
Breaks in oil tank
Oil filter
-2-
Every
40 hrs. or 80 hrs or
When
Seasonally
800 km 1600 km
necessary
(500mi) (1000 mi)
a
a
a
a
a
a
a a
a a
a a
a a
a a
a
a a
a
a
a
a
a
a a
a
a a
a a
a a
a a
a a
a a
a a
a a
a a
a a
a a
a 0
a a
a
a
a
a a
a
a a
a
a
a a
a a
a

1980 ET340ED
Every
Check point
20 hrs. or 40 hrs. or
80 hrs or
When
Seasonally
400 km
800 km 1600 km necessary
1250 mil 1500 md
11000 mr)
ELECTRICAL
Wear. breakage of wire cover ing
0 0
Breaks;n high - tension cord 0 0
Voltage regulator working voltage
0
Operation of engine stop sWitch 0 0
Operation of tether switch
()
0
Headlight
(,
0
Taillight
( , 0
Brake light
( 0
Battery fluid top up/specific gravity and breather pipe
0 0
•• R etighten every 10 hours from the first use.
[LUBRICATION INTERVALS]
Every
Lubrication point
20 hrs. or 40 hrs. or BO hrs or
When
Seasonally
O,l/Greilse
400 km BOO km 1600 km necessary Brand
name
1250 mil 1500 mil 11000 mil
ENGINE
Starter case 0
a,l pump control box 0 0
Aeroshell grease ;1 7A or
Esso Beacon
325 grease
P
ump drive cover 0 0
all In the 011 tank
C
YAMALUBE 2-cycle 011
DRIVE
Primary sheave weight
0 0
Molybdenum disulfide
and roller pins
snowmobile grease
Secondary shaft and 0 0 Molybdenum disulfide
sliding sheave snowmobile grease
Front axle
housing
0 0
Shaft 1 and shaft 2 0
ISlide rail! 0 Light all-
purpose grease
Drive
chain oil Gear oil API
"GL-3"
repla cement
0 0 SAE
#75 or #80
BODY:
Steering column lower
0 0 Light all- purpose grease
bearing
Steering column uppe r 0 0
Motor oil
bearing
Steering links 0 0
Ski column
0 0
Ski wear plate
0
Light all- purpose grease
0
Ski retaining pin 0 0
Brake wire end stopper
0 0 Esso Beacon 325 grease
and brake lever
-3-

1980 ET340ED
3. SPECIFICATIONS
NOTE : * .... New specification
General (Compared
with 1979 ET340EC)
Model
ET340 ED
Model:
Model (I.B.M. No.) * ET340ED (8J9)
Frame 1.0. & starting number
* 8J9-040101
Engine 1.0. & starting number
*
E338 - 040101
Dimension:
Overall length
* 2.555 mm (100.6 in)
Overall width (std)
970 mm (38 .2 in)
Overall height (w/windshield) 1.040 mm (40.9 in)
Engine
Description:
Engine type
Fan cooled two-stroke 5-port. twin cylinders
Engine model E338
Displacement
338 cc (2 0.6 cu.in)
Bore X
Stroke 60 X 59 .6 mm (2.36 X 2.35 in)
Effective
compression ratio
6.5: 1
Starting system Recoil hand
starter and electric starter
Ignition system C.D.I.
Lubrication system "Autolube" oil inspection
Cylinder head:
Combustion chamber volume (with spark plug)
21.3 cc (1.30 cu.in)
Compression chamber type
Dome + Squish
Head gasket thickness 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:
Piston skirt clearance (Measuring point) 0.040 ~ 0.045 mm (0.0016 ~ 0.0018 in)
(10 mm from piston skirt end)
Piston over size 1st 60.25 mm (2. 372 in)
2nd 60.50 mm (2.382 in)
3rd 60.75 mm (2. 392 in)
4th 61.00 mm (2.402 in)
Piston pin outside diamet er X length
¢16 X 47 mm (¢0.630 X 1. 85 in)
Piston ring:
Piston ring design (Top) Keystone
Piston ring design (2nd) Keystone
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
Big end bearing:
Type Needle bearing
Crankshaft:
Crankshaft assembly
width (A)
160 ±0.1 mm (6.30 ± 0.004 in)
-4-