2012 YAMAHA YFZ450 weight

8-41
8
EBU26864Drive chain slack The drive chain slack should be checked before
each ride and adjusted if necessary.
To check the drive chain slack1. Place the ATV on a level surface.TIPWhen checking and adjusting the drive chain
slack, there should be no weight on the ATV and
all tires must be touching the ground.2. Move the ATV back and forth to locate the tightest portion of the drive chain, and then
measure the drive chain slack as shown. 3. If the drive chain slack is incorrect, adjust it as
follows.
To adjust the drive chain slack 1. Place the ATV on a level surface.
2. Loosen the rear wheel axle pinch bolts.
3. Insert a rod of a diameter of 8 mm (0.3 in) and a length of 10 cm (4 in) into one of the holes in
the drive chain tensioner as shown.
Drive chain slack:
25.0– 35.0 mm (0.98 –1.38 in)
1. Drive chain slack
1
U1PD60E0.book Page 41 Monday, June 13, 2011 2:57 PM

10-1
10
EBU25961
SPECIFICATIONS
Dimensions:Overall length:1840 mm (72.4 in)
Overall width: 1170 mm (46.1 in)
Overall height:
1090 mm (42.9 in)
Seat height: 810 mm (31.9 in)
Wheelbase: 1280 mm (50.4 in)
Ground clearance:
255 mm (10.0 in)
Minimum turning radius: 3500 mm (138 in)Weight:With oil and fuel:
169.0 kg (373 lb)Noise and vibration level:Noise level (77/311/EEC):82.0 dB(A)@3750 r/min (EUR)(FRA)(GBR)
A-weighted sound power level:
98.0 dB(A)@3750 r/min (EUR)(FRA)(GBR)
Vibration on seat (EN1032, ISO5008): Will not exceed 0.5 m/s ² (EUR)(FRA)(GBR)
Vibration on handlebar (EN1032, ISO5008): Will not exceed 2.5 m/s ² (EUR)(FRA)(GBR)
Engine:Engine type:
Liquid cooled 4-stroke, DOHC
Cylinder arrangement: Forward-inclined single cylinder
Displacement:
449 cm ³
Bore × stroke:
95.0 × 63.4 mm (3.74 × 2.50 in)
Compression ratio: 11.40 : 1
Starting system:
Electric starter
Lubrication system: Dry sumpEngine oil:Recommended brand:
YAMALUBE
U1PD60E0.book Page 1 Monday, June 13, 2011 2:57 PM

10-3
10
Secondary reduction system:Chain drive
Secondary reduction ratio: 38/14 (2.714)
Transmission type:
Constant mesh 5-speed
Operation: Left foot operation
1st: 29/12 (2.416)
2nd:
27/14 (1.928)
3rd: 25/16 (1.562)
4th: 23/18 (1.277)
5th:
21/20 (1.050)Chassis:Frame type:Steel tube frame
Caster angle:
5.0 °
Trail: 21.0 mm (0.83 in)Front tire:Type:
Tubeless
Size: AT21 x 7-10
Manufacturer/model: DUNLOP/KT851B Bias
Rear tire:Type:Tubeless
Size:
AT20 x 10R9
Manufacturer/model: DUNLOP/KT355A RadialLoading:Maximum loading limit:
100.0 kg (220 lb)
(Total weight of rider, cargo, accessories, and tongue)Tire air pressure (measured on cold tires):Recommended:Front:
25.0 kPa (0.250 kgf/cm ², 3.6 psi)
Rear: 30.0 kPa (0.300 kgf/cm ², 4.4 psi)
Minimum: Front: 22.0 kPa (0.220 kgf/cm ², 3.2 psi)
Rear: 27.0 kPa (0.270 kgf/cm ², 4.0 psi)Front wheel:Wheel type:
Panel wheel
Rim size: 10 x 5.5ATRear wheel:Wheel type:Panel wheel
U1PD60E0.book Page 3 Monday, June 13, 2011 2:57 PM