2010 YAMAHA WR 250F oil

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Page 31 of 232

YAMAHA WR 250F 2010  Owners Manual 1-21
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 32 of 232

YAMAHA WR 250F 2010  Owners Manual 2-1
GENERAL SPECIFICATIONS
SPECIFICATIONS
GENERAL SPECIFICATIONS
Model name:WR250FZ (USA, CDN, AUS, NZ)
WR250F (EUROPE, ZA)
Model code number: 5UMT (USA)
5UMU (CDN)
5UMV (EUROPE)
5UMW (AUS, NZ, ZA)
Di

Page 34 of 232

YAMAHA WR 250F 2010  Owners Manual 2-3
MAINTENANCE SPECIFICATIONS
MAINTENANCE SPECIFICATIONS
ENGINEShock absorber:
Front shock absorber Coil spring/oil damper
Rear shock absorber Coil spring/gas, oil damper
Wheel travel: Front wheel tr

Page 38 of 232

YAMAHA WR 250F 2010  Owners Manual 2-7
MAINTENANCE SPECIFICATIONS
Oil ring:Dimensions (B × T) 1.50 × 2.25 mm (0.06 × 0.09 in)----
End gap (installed) 0.10–0.40 mm (0.004–0.016 in)----
Crankshaft: Crank width "A" 55.95–56.00 mm

Page 39 of 232

YAMAHA WR 250F 2010  Owners Manual 2-8
MAINTENANCE SPECIFICATIONS
CHASSISCarburetor:
USA, CDN, ZA, 
AUS, NZ EUROPE
Type/manufacturer FCR-MX37/KEIHIN← ----
I. D. mark 5UME E05UML L0----
Main jet (M.J) #170#160----
Main air jet (M.A.J)

Page 40 of 232

YAMAHA WR 250F 2010  Owners Manual 2-9
MAINTENANCE SPECIFICATIONS
Front suspension:Front fork travel 300 mm (11.8 in)----
Fork spring free length 460 mm (18.1 in)455 mm (17.9  
in)
Spring rate, STD K = 4.4 N/mm (0.449 kg/mm, 25.1 lb/in

Page 41 of 232

YAMAHA WR 250F 2010  Owners Manual 2-10
MAINTENANCE SPECIFICATIONS
ELECTRICALDrive chain:
Type/manufacturer DID520VM/DAIDO----
Number of links 113 links + joint----
Chain slack 48–58 mm (1.9–2.3 in)----
Chain length (15 links) ----

Page 42 of 232

YAMAHA WR 250F 2010  Owners Manual 2-11
MAINTENANCE SPECIFICATIONS
Charging system:System type AC magneto ----
Model (stator)/manufacturer 5UM 30/YAMAHA ----
Normal output 14 V/120 W at 5,000 r/min ----
Charging coil resistance (color)
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