2009 YAMAHA WR 250F fuel pressure

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Page 10 of 224

YAMAHA WR 250F 2009  Owners Manual 1-2
MACHINE IDENTIFICATION
MACHINE IDENTIFICATION
There are two significant reasons for 
knowing the serial number of your 
machine:
1. When ordering parts, you can give the number to your Yamaha 
dea

Page 25 of 224

YAMAHA WR 250F 2009  Owners Manual 1-17
CLEANING AND STORAGE
CLEANING AND STORAGE
CLEANING
Frequent cleaning of your machine 
will enhance its appearance, maintain 
good overall performance, and ex-
tend the life of many components.
1.

Page 27 of 224

YAMAHA WR 250F 2009  Owners Manual 2-2
GENERAL SPECIFICATIONS
Oil capacity:Engine oilPeriodic oil change 1.1 L (0.97 Imp qt, 1.16 US qt)
With oil filter replacement 1.2 L (1.06 Imp qt, 1.27 US qt)
Total amount 1.4 L (1.23 Imp qt, 1.48

Page 60 of 224

YAMAHA WR 250F 2009  Owners Manual 3-7
PRE-OPERATION INSPECTION AND MAINTENANCE
PRE-OPERATION INSPECTION AND MAINTENANCE
Before riding for break-in operation or practice, make sure the machine is in good operating condition.
Before usi

Page 69 of 224

YAMAHA WR 250F 2009  Owners Manual 3-16
ENGINE
CHECKING THE OIL PRESSURE
1. Check:•Oil pressure
Checking steps:
a. Slightly loosen the oil pressure  check bolt "1".
b. Start the engine and keep it idling  until oil starts to seep fro

Page 88 of 224

YAMAHA WR 250F 2009  Owners Manual 4-1
ENGINE (Except for Canada)
TUNING
ENGINE (Except for Canada)
CARBURETOR SETTING
• The air/fuel mixture will vary de-pending on atmospheric conditions. 
Therefore, it is necessary to take 
into c