2011 YAMAHA YZ450F torque

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Page 10 of 230

YAMAHA YZ450F 2011  Owners Manual CONTENTS
CHAPTER 1
GENERAL 
INFORMATION
LOCATION OF 
IMPORTANT LABELS ..... 1-1
DESCRIPTION ................. 1-5
CONSUMER 
INFORMATION................. 1-6
FEATURES....................... 1-7
INCLUDE

Page 28 of 230

YAMAHA YZ450F 2011  Owners Manual 1-18
STARTING AND BREAK-IN
• Unlike a two-stroke engine, this 
engine cannot be kick started 
when the throttle is open be-
cause the kickstarter may kick 
back. Also, if the throttle is open 
the a

Page 29 of 230

YAMAHA YZ450F 2011  Owners Manual 1-19
TORQUE-CHECK POINTS
TORQUE-CHECK POINTS
Concerning the tightening torque, refer to "TIGHTENING TORQUES" section in the CHAPTER 2.
Frame construction Frame to rear frame
Combined seat and fuel tan

Page 41 of 230

YAMAHA YZ450F 2011  Owners Manual 2-11
TIGHTENING TORQUES
TIGHTENING TORQUES
ENGINE
△- marked portion shall be checked for torque tightening after break-in or before each race.
Part to be tightened Thread size QtyTightening torque

Page 42 of 230

YAMAHA YZ450F 2011  Owners Manual 2-12
TIGHTENING TORQUES
*1: Tighten the cylinder head bolts to 30 Nm (3.0 m•kg, 22 ft•lb) in the proper tightening sequence, remove and retighten 
the cylinder head bolts to 20 Nm (2.0 m•kg, 14

Page 43 of 230

YAMAHA YZ450F 2011  Owners Manual 2-13
TIGHTENING TORQUES
CHASSIS
△- marked portion shall be checked for torque tightening after break-in or before each race.
Part to be tightened Thread size QtyTightening torque
Nm m•kg ft•lb

Page 44 of 230

YAMAHA YZ450F 2011  Owners Manual 2-14
TIGHTENING TORQUES
△Driven sprocket and wheel hub M8 × 1.25 6 42 4.2 30
△Nipple (spoke) — 72 3 0.3 2.2
△Disc cover and rear brake caliper M6 × 1.0 2 10 1.0 7.2
△Protector and rear bra

Page 45 of 230

YAMAHA YZ450F 2011  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
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