8-63
8
EBU25741TroubleshootingAlthough Yamaha ATVs receive a thorough in-
spection before shipment from the factory, trouble
may occur during operation. Any problem in the
fuel, compression, or ignition systems, for exam-
ple, can cause poor starting and loss of power.
The following troubleshooting charts represent
quick and easy procedures for checking these vi-
tal systems yourself. However, should your ATV
require any repair, take it to a Yamaha dealer,
whose skilled technicians have the necessary
tools, experience, and know-how to service the
ATV properly.
Use only genuine Yamaha replacement parts. Im-
itation parts may look like Yamaha parts, but they
are often inferior, have a shorter service life and
can lead to expensive repair bills.
WARNING
EWB02281Do not smoke when checking the fuel system.
Fuel can ignite or explode, causing severe inju-
ry or property damage. Make sure there are no
open flames or sparks in the area, including pi-
lot lights from water heaters or furnaces. UB4F60E0.book Page 63 Wednesday, April 25, 2018 11:52 AM
10-2
10
Vibration on handle (EN1032, ISO5008):Will not exceed 2.5 m/s² (YFM70GPAK,
YFM70GPHK_EUR/FRA/GBR, YFM70GPLK,
YFM70GPXK_EUR/FRA/GBR)
Uncertainty of measurement:
0.1 m/s² (YFM70GPAK, YFM70GPHK_EUR/FRA/GBR,
YFM70GPLK, YFM70GPXK_EUR/FRA/GBR)Engine:Combustion cycle:4-stroke
Cooling system: Liquid cooled
Valve train:
SOHC
Number of cylinders: Single cylinder
Displacement: 686 cm³
Bore × stroke:
102.0 × 84.0 mm (4.02 × 3.31 in)
Compression ratio: 10.0 : 1
Starting system: Electric starter
Lubrication system:
Wet sumpEngine oil:Recommended brand:YAMALUBE
SAE viscosity grades:
5W-30, 10W-30, 10W-40, 15W-40, 20W-40, 20W-50 Recommended engine oil grade:
API service SG type or higher, JASO standard MA
Quantity: Oil change: 2.00 L (2.11 US qt, 1.76 Imp.qt)
With oil filter removal: 2.10 L (2.22 US qt, 1.85 Imp.qt)
Final gear oil:Type:Yamaha Friction Modified Plus Shaft Drive Oil (Part No.:
ACC-SHAFT-PL-32) or SAE 80 API GL-4 Hypoid gear oil
Quantity: 0.20 L (0.21 US qt, 0.18 Imp.qt)Differential gear oil:Type:
Yamaha Friction Modified Plus Shaft Drive Oil (Part No.:
ACC-SHAFT-PL-32) or SAE 80 API GL-4 Hypoid gear oil0 10 30 50 70 90 110 130 ˚F
–20 –10 0 10 20 30 40 50 ˚CSAE 5W-30
SAE 10W-30
SAE 10W-40
SAE 15W-40
SAE 20W-40SAE 20W-50
UB4F60E0.book Page 2 Thursday, June 7, 2018 10:42 AM
