2009 YAMAHA WR 450F check engine

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Page 6 of 226

YAMAHA WR 450F 2009  Owners Manual FOREWORD
INTRODUCTION
Congratulations on your purchase of 
a Yamaha WR series. This model is 
the culmination of Yamahas vast ex-
perience in the production of paceset-
ting racing machines. It repre

Page 10 of 226

YAMAHA WR 450F 2009  Owners Manual CONTENTS
CHAPTER 1
GENERAL INFOR-
MATION
DESCRIPTION ................. 1-1
MACHINE 
IDENTIFICATION ............. 1-2
INCLUDED PARTS .......... 1-2
IMPORTANT 
INFORMATION................. 1-2
CHECKING

Page 24 of 226

YAMAHA WR 450F 2009  Owners Manual 1-14
STARTING AND BREAK-IN
STARTING AND BREAK-IN
FUEL
Always use the recommended fuel as 
stated below. Also, be sure to use 
new gasoline.
Use only unleaded gasoline. The 
use of leaded gasoline will

Page 25 of 226

YAMAHA WR 450F 2009  Owners Manual 1-15
STARTING AND BREAK-IN
The engine fails to start
Pull the hot starter lever all the way 
out and while holding the lever, kick 
the kickstarter crank 10 to 20 times to 
clear the engine. Then, res

Page 26 of 226

YAMAHA WR 450F 2009  Owners Manual 1-16
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 39 of 226

YAMAHA WR 450F 2009  Owners Manual 2-12
TIGHTENING TORQUES
TIGHTENING TORQUES
ENGINE
△- marked portion shall be checked for torque tightening after break-in or before each race.
*1: Tighten the cylinder head bolts to 30 Nm (3.0 m•k

Page 40 of 226

YAMAHA WR 450F 2009  Owners Manual 2-13
TIGHTENING TORQUES
Radiator pipe 1, 2 M10 × 1.0 2 10 1.0 7.2
Impeller M8 × 1.25 1 14 1.4 10
Water pump housing cover M6 × 1.0 3 10 1.0 7.2
Coolant drain bolt M6 × 1.0 1 10 1.0 7.2
Oil pump co

Page 56 of 226

YAMAHA WR 450F 2009  Owners Manual 3-1
PERIODIC MAINTENANCE CHART FOR THE EMISSION
CONTROL SYSTEM (For Canada)
REGULAR INSPECTION AND ADJUSTMENTS
PERIODIC MAINTENANCE CHART FOR THE EMISSION CONTROL SYSTEM (For Canada)
• From 4,200 mi
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