Yamaha WR450F
50 hp, 449 cc, 273 lbs2012 - 2015
Yamaha WR250R
30 hp, 250 cc2016
EngineYamaha WR450FYamaha WR250R
Displacement449 cc250 cc
Max power50 hp (@8 500 RPM)30 hp (@10 000 RPM)
Max torque36 lb ft (@7 500 RPM)16 lb ft (@8 000 RPM)
Redline11 500 RPM11 500 RPM
Idling speed1 900 RPM1 200 RPM
ManagementFuel InjectionFuel Injection
LayoutDOHC SingleDOHC Single
Compression12.30:111.80:1
Oil capacity0.95 quart1.33 quart
Oil type10W4010W30, 10W40, YAMALUBE 10W40
Spark plug typeNGK CR8ENGK CR9EK
CoolingLiquidLiquid
Valves54
Bore95.0 mm77.0 mm
Stroke63.4 mm53.6 mm
Throttle bore42.0 mm
Weight to power5.47 lbs/hp
Power to weight457 hp/2500lbs
Battery type12V 6Ah, YTZ7S (F)YTZ7S, 12V 6Ah
GearboxYamaha WR450FYamaha WR250R
TypeSequentialSequential
ClutchWetWet
DriveChainChain
Chain typeDAIDO 520VM2 114 links
Gears count56
Primary ratio2.6523.12
Final drive3.8463.231
1. gear2.417 (37 mph)2.642 (33 mph)
2. gear1.733 (52 mph)1.813 (48 mph)
3. gear1.313 (68 mph)1.318 (66 mph)
4. gear1.05 (84 mph)1.04 (83 mph)
5. gear0.84 (106 mph)0.888 (97 mph)
6. gear0.766 (113 mph)
ChasisYamaha WR450FYamaha WR250R
Frame typeBilateral beam aluminumSemi double cradle
Front susp.48mm USD, 11.81 in travelUSD, 10.63 in travel
Rear susp.Swingarm monoshock, 11.57 in travelSwingarm monoshock, 10.43 in travel