WR250F: Strong enduro package with reversed engine layout

WR250F: Strong enduro package with reversed engine layout

A major technical update for 2015: Our WR250F is based on the radical YZ250F motocrosser, with lots of refinements for the specific enduro usage. Let’s have a look at its highlights.

2015_WR250F_Off road_Reversed engine head with airbox in front from 236-603860 (gc_single_col)Reversed engine head with airbox in front
2015_WR250F_Off road_Engine layout from 236-603707 (gc_single_col)Engine layout for best mass concentration
2015_WR250F_Off road_Potent powerhouse from 236-603731 (gc_single_col)Potent powerhouse
 
2015_WR250F_Off road_Power tuner to set the engine from 236-603737 (gc_single_col)Power tuner to set the engine
    
Engine: better power and better handling
The engine has the air intake in front and the exhaust to the rear. Why?
-Lighter parts such as the airbox are located higher and up front. And more out of the way of dirt and debris.
-Heavy engine parts are concentrated in a lower and more central position.
-The fuel sits in a lower and more central place in the frame, so the fuel load has less influence on the handling.
-The air intake tract is straighter, which benefits the high-rpm performance.
-By having the exhaust pipe ‘snake’ around the cylinder, its weight is concentrated around the engine while it has enough length for good torque.
 
Fuel injection
This potent powerhouse has a stronger feeling all through the rev range, and is considerably more powerful than before. With a bore of 77mm, 4 large titanium valves, forged piston and offset cylinder layout it revs effortlessly into high rpm ranges. The fuel injection provides excellent starting and running in all kinds of temperature and altitude variations. The low fuel consumption by its efficient combustion is an interesting bonus.
 
Power tuner
Another benefit enabled by the fuel injection, is the accessory Yamaha Power Tuner.
This device allows to personalize the engine character to your own taste or riding style. Or to the specific riding conditions in your area. Also, you can tune the engine to modifications like a different muffler! In an easy way, you can set air/fuel mixture and ignition timing maps, on the spot. And without need for a laptop, which can be a hassle to bring along and use in dusty or wet conditions…


2015_WR250F_Off road_Elaborate frame construction from 236-603695 (gc_single_col)Elaborate frame construction
2015_WR250F_Off road_No fuel cap in the way from 236-603725 (gc_single_col)No fuel cap in the way
2015_WR250F_Off road_Enduro setup from 236-603701 (gc_single_col)Enduro setup
2015_WR250F_Off road_Sturdy skid plate and high-quality suspensions from 236-603749 (gc_single_col)Sturdy skid plate and high-quality suspensions
2015_WR250F_Off road_Powerful, light, fun to ride from 236-603743 (gc_single_col)Powerful, light, fun to ride
2015_WR250F_Off road_A package that is hard to beat from 236-603689 (gc_single_col)A package that is hard to beat
    
Chassis
The elaborate aluminium main frame construction is built from 10 different components. Not only beautiful, also very functional! It is compact, has excellent flex characteristics and provides a light and nimble feel for the bike. The narrow knee grip and flat top of the seat allow easy rider movement on the machine. Even the fuel cap is out of the way, for extreme weight shifts in tricky situations. High quality Kayaba suspensions have ample setting possibilities. Their low-friction coatings make them very sensitive, a clear benefit in enduro usage. 
 
Enduro specific features
There are many differences with the motocross models. The WR250F comes in competition-ready enduro setup! Some examples are:
-Metzeler Six Days Extreme tyres
-18 inch rear wheel
-Push button electric start for easy starting, while a kickstarter is still equipped as well.
-6-speed gearbox with special enduro clutch, designed to handle a wide variety of use from technical rock climbs and tight forest trails to full throttle stints across open terrain.
-Speedometer that includes 2 trip meters, clock, race mode with timer and also fuel and engine lamps.
-Sturdy and light-weight skid plate that protects the engine from stones, tree stumps and mud.
-Aluminium sidestand, light and convenient.
-O-ring chain, more resistant to dirt and requires less maintenance.
-Tapered handlebar that can be mounted in 4 different positions to front or rear - to suit different riders or riding styles.
 
All in all, the WR250F is a modern and competitive enduro bike using our latest motocross technologies. It is designed for both the professional and recreational rider: Powerful, fun to ride, and easy to use. Add the Yamaha famous quality and reliability and you have a package that is hard to beat!


Technical specifications

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