2015 YAMAHA YZ450F Owners Manual

Page 49 of 360

YAMAHA YZ450F 2015  Owners Manual ENGINE SPECIFICATIONS
2-6
Oil ring
Dimensions (B  T) 1.50  2.55 mm (0.06  0.10 in)
End gap (installed) 0.20–0.50 mm (0.0079–0.0197 in)
Crankshaft
Width A 61.95–62.00 mm (2.439–2.441 i

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YAMAHA YZ450F 2015  Owners Manual ENGINE SPECIFICATIONS
2-7
Shifting mechanism
Shift mechanism type Shift drum and guide bar
Shift fork guide bar bending limit 0.050 mm (0.0020 in)
Shift fork thickness 4.85 mm (0.1909 in)
Decompressio

Page 51 of 360

YAMAHA YZ450F 2015  Owners Manual CHASSIS SPECIFICATIONS
2-8
EAS1SL5055
CHASSIS SPECIFICATIONS
Chassis
Frame type Semi double cradle
Caster angle 27.08 ° (USA) (CAN)
27.50 ° (EUR)
27.67 ° (JPN)
27.58 ° (AUS) (NZL) (ZAF)
Trail 120

Page 52 of 360

YAMAHA YZ450F 2015  Owners Manual CHASSIS SPECIFICATIONS
2-9
Brake disk thickness limit 2.5 mm (0.10 in)
Brake pad lining thickness (inner) 4.4 mm (0.17 in)
Limit 1.0 mm (0.04 in)
Brake pad lining thickness (outer) 4.4 mm (0.17 in)
Li

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YAMAHA YZ450F 2015  Owners Manual CHASSIS SPECIFICATIONS
2-10
Compression damping adjusting positions 
* Position in which the adjuster is turned in finger tight
Minimum 20 click (s) out*
Standard 8 click (s) out*
Maximum (hard) Fully

Page 54 of 360

YAMAHA YZ450F 2015  Owners Manual CHASSIS SPECIFICATIONS
2-11
Drive chain
Type/manufacturer 520DMA2-SDH/DAIDO
Number of links 114
Drive chain slack 50–60 mm (1.97–2.36 in)
15-link length limit 242.9 mm (9.56 in)

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YAMAHA YZ450F 2015  Owners Manual ELECTRICAL SPECIFICATIONS
2-12
EAS1SL5056
ELECTRICAL SPECIFICATIONS
Voltage
System voltage 12 V
Ignition system
Ignition system TCI
Advancer type Digital
Ignition timing (B.T.D.C.) 10.0 ° at 2000 r/m

Page 56 of 360

YAMAHA YZ450F 2015  Owners Manual TIGHTENING TORQUES
2-13
EAS20320
TIGHTENING TORQUES
EAS1SL5057GENERAL TIGHTENING TORQUE SPECIFI-
CATIONS
This chart specifies tightening torques for stan-
dard fasteners with a standard ISO thread 
pi