2013 YAMAHA YZ450F ignition

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Page 10 of 228

YAMAHA YZ450F 2013  Owners Manual CONTENTS
CHAPTER 1
GENERAL INFOR-
MATION
LOCATION OF 
IMPORTANT LABELS ..... 1-1
DESCRIPTION ................. 1-5
CONSUMER 
INFORMATION................. 1-6
FEATURES....................... 1-7
INCLUD

Page 17 of 228

YAMAHA YZ450F 2013  Owners Manual 1-7
FEATURES
FEATURES
OUTLINE OF THE FI SYSTEM
The main function of a fuel supply system is to provide fuel to the combustion chamber at the optimum air-fuel ratio in ac-
cordance with the engine oper

Page 23 of 228

YAMAHA YZ450F 2013  Owners Manual 1-13
SPECIAL TOOLS
Cap bolt wrench
YM-01500, 90890-01500This tool is used to loosen or tighten 
the base valve.
Cap bolt ring wrench
YM-01501, 90890-01501This tool is used to loosen or tighten 
the da

Page 25 of 228

YAMAHA YZ450F 2013  Owners Manual 1-15
SPECIAL TOOLS
Valve guide remover
5.5 mm (0.22 in)
YM-01122This tool is needed to remove and 
install the valve guide.
Valve guide installer
5.5 mm (0.22 in)
YM-04015This tool is needed to instal

Page 33 of 228

YAMAHA YZ450F 2013  Owners Manual 2-3
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINEWheel travel:
Front wheel travel 310 mm (12.2 in)
Rear wheel travel 315 mm (12.4 in) (For USA, CDN)
312 mm (12.3 in) (For EUROPE, AUS, N

Page 40 of 228

YAMAHA YZ450F 2013  Owners Manual 2-10
MAINTENANCE SPECIFICATIONS
ELECTRICALFront disc brake:
Disc outside dia.×Thickness 250 × 3.0 mm (9.84 × 0.12 in) 250 × 2.5 mm 
(9.84 × 0.10 in)
Pad thickness 4.4 mm (0.17 in) 1.0 mm (0.04 
i

Page 45 of 228

YAMAHA YZ450F 2013  Owners Manual 2-15
TIGHTENING TORQUES
1. First, tighten the steering ring nut approximately 38 Nm (3.8 m•kg, 27 ft•lb) by using the steering nut wrench, then loosen 
the steering ring nut one turn.
2. Retighten

Page 51 of 228

YAMAHA YZ450F 2013  Owners Manual 2-21
CABLE ROUTING DIAGRAM
1. Clutch cable
2. Throttle cable (return)
3. Throttle cable (pull)
4. Cable holder
5. Clamp
6. Rectifier/regulator
7. Ignition coil
8. Ignition coil coupler
9. AC magneto c
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