2015 Yamaha YZ two-strokes
Yamaha reaffirms its commitment to its two-stroke brigade. We also have details on the 2015 YZ250F and YZ450F four-strokes motocrossers as wellYamaha has unveiled a number of significant updates to its two-stroke motocross range – not a common declaration made these days from a Japanese manufacturer.
As well as technical improvements, every model --- the YZ85, YZ125 and YZ250 -- features new bodywork and graphics that echo the modern style of the latest YZ-F four-stroke models.
Yamaha and two-stroke technology go back a very long way. The company's first ever production bike was a two-stroke and in 1973 Yamaha won the first of its 26 world motocross titles on a YZ250 two-stroke.
2015 YZ85
The 2015 YZ85 is equipped with a new front fender, air scoops, side covers and seat cover to give a “lean and professional image”.
In addition to the refreshed image, the YZ85 also has revised intake and exhaust port timing, a modified cylinder and a clutch adjuster mechanism.
The carburetor remains at 28mm, and other existing arrangements include the six-speed transmission, upside-down forks, tubular semi-double cradle frame and detachable subframe.
2015 YZ125
The new front and rear fenders, number plate, air scoops, airbox/side covers, fork protectors and seat cover “give a thoroughly up to the minute 'factory-bike' feel”,
Significant improvements have been made to the front (48mm upside-down forks with
separate air/oil function) and rear suspension (monocross), replicating the YZ125’s four-stroke brethren. There is full adjustability at both ends.
There is a handlebar-mounted clutch adjuster mechanism, and the YZ125 is also fitted with wider YZ-F type footrests that give improved feel and comfort. Completing the 2015 package are the latest pattern Dunlop tyres, as well as a YZ-F style rear sprocket, rear disc guard and rear caliper guard.
2015 YZ250
The 2015 YZ250 2-stroke has undergone the same visual transformation and technical upgrades as the YZ125, including the fitment of the latest YZ-F four-stroke front and rear suspension systems, as well as contemporary new bodywork and graphics. The new YZ250 is also equipped with a handlebar mounted clutch adjuster, as well as wider footrests and the latest pattern Dunlop tyres.
2015 YZ450F and YZ250F
Changes have been made to the fuel injection and ignition settings in order to further improve power characteristics: to smooth out the power delivery on the YZ450F, and to produce stronger mid-range power on the YZ250F.
For easier maintenance, the air cleaner cover is equipped with quick release fasteners that replace the bolts on the current bikes. Both models also receive some detail changes to the engine internals.
The 2015 models also have new black rims.
We’re still awaiting word on Australian availability of the 2015 Yamaha motocross range.
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