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8
3. Lower the ATV to the ground.
4. Tighten the wheel nuts to the specified
torques.
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.
1. Tapered nutTightening torques:Front wheel nut:55 Nm (5.5 m·kgf, 40 ft·lbf)
Rear wheel nut: 55 Nm (5.5 m·kgf, 40 ft·lbf)
U2LC61E0.book Page 63 Wednesday, February 26, 2014 3:56 PM
10-1
10
EBU25962
SPECIFICATIONS
Dimensions:Overall length:1993 mm (78.5 in)
Overall width: 1093 mm (43.0 in)
Overall height:
1120 mm (44.1 in)
Seat height: 840 mm (33.1 in)
Wheelbase: 1233 mm (48.5 in)
Ground clearance:
245 mm (9.6 in)
Minimum turning radius: 3000 mm (118 in)Weight:Curb weight:
YFM450DF 275.0 kg (606 lb) (AUS)(NZL)
YFM450DF 276.0 kg (608 lb) (EUR)(FRA)(GBR)
YFM450PF 281.0 kg (619 lb) (AUS)(NZL)
YFM450PF 282.0 kg (622 lb) (EUR)(FRA)(GBR)
YFM450PHF 282.0 kg (622 lb)Noise and vibration level:Noise level (77/311/EEC):YFM450DF 78.3 dB(A) (EUR)(FRA)(GBR)
YFM450PF 78.3 dB(A) (EUR)(FRA)(GBR)
YFM450PHF 78.3 dB(A) Vibration on seat (EN1032, ISO5008):
YFM450DF 0.6 m/s² (EUR)(FRA)(GBR)
YFM450PF 0.6 m/s² (EUR)(FRA)(GBR)
YFM450PHF 0.6 m/s²
Vibration on handle (EN1032, ISO5008): YFM450DF Will not exceed 2.5 m/s² (EUR)(FRA)(GBR)
YFM450PF Will not exceed 2.5 m/s² (EUR)(FRA)(GBR)
YFM450PHF Will not exceed 2.5 m/s²
Engine:Engine type:Liquid cooled 4-stroke, SOHC
Cylinder arrangement:
Single cylinder
Displacement: 421 cm³
Bore × stroke:
84.5 × 75.0 mm (3.33 × 2.95 in)
Compression ratio:
10.0 : 1
Starting system: Electric starter
Lubrication system: Wet sumpEngine oil:Recommended brand:YAMALUBE
U2LC61E0.book Page 1 Wednesday, February 26, 2014 3:56 PM
