Yamaha yz 250. Yz250 For Sale 2019-11-13

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Yamaha yz 250

Our first test day was a cold morning, but we yanked the choke up and the bike fired on the first kick. The removable aluminum rear frame is created from the section section tubes to reduce weight. A high-compression piston works with intake and exhaust cam timing to deliver outstanding engine character with a focus on top-end power delivery. The model was launched in 1974 and has been regularly updated, and is one of the only two-stroke bikes of this displacement still in production, with new releases every year. The kick-start lever feels long and allows for lots of leverage, so the X starts quite easily. Every aspect has been carefully retuned, with thinner main spars, thicker down tubes and all-new motor mounts that work together to shed weight and boost handling feel at the limit.

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Yamaha YZ250: review, history, specs

Yamaha yz 250

Our testers size 11s felt that the shift lever was short, putting the tip too far away from the toes of their boots. Adjustable Fuel Mapping A handlebar-mounted map switch allows the rider to quickly select between preloaded engine maps—loaded and configured in the Power Tuner app—to account for changing track and weather conditions. The high-pressure radiator features a 10-row, four-cavity radiator for maximum cooling efficiency. Together, these details give the rider an ideal balance of open-class power with exceptional controllability. Together, these details give the rider an ideal balance of open-class power with exceptional controllability. Engine Engine Type 249cc liquid-cooled 2-stroke; reed-valve inducted Bore x Stroke 66. The suspension absorbs hack, rocks and roots nicely.

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SENGE GRAPHICS

Yamaha yz 250

The spacing of the gears is well matched to the powerband of the motor. Yamaha has done a nice job of targeting suspension valving that has the ability to chew on a variety of dishes in the off-road environment. Light and Strong Aluminum Frame An all-aluminum bilateral beam frame provides strength, lightness and durability for cross country racing conditions, and comes standard with a rugged plastic skid plate. Mass-Centralized Powerplant The position of the engine moves the rotational mass of the cams towards the center of the bike which allows for a straight shot, down draft intake and straight exhaust port for maximized engine performance. Overall, it has persuaded a big chunk of our testers, who are off-road-biased, with traits designed for exploring ugly terrain. Fuel Injection The fuel injection system uses 3D mapped electronic control for the fuel and ignition timing that are optimized for cross-country racing.

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Yamaha YZ250

Yamaha yz 250

In addition to shaving weight, the body design provides more comfortable knee grip and control feel, with a seat shaped to give the rider additional room to move aboard the machine. The bike changes directions extremely easily, and the front end goes where you point it. The Yamaha is much better suited for this kind of riding. In super-tight gullies where the trail is wickedly random and thin, the handling is magic. In addition to shaving weight, the body design is narrow for more comfortable knee grip and control feeling, while the narrow seat gives the rider additional room to move aboard the machine. Rider-Friendly Chassis Ultra light weight means nimble handling with less fatigue. The Yamaha came out on top.

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YAMAHA YZ250X 2

Yamaha yz 250

This layout contributes to centralized mass for a lightweight handling feeling on the track. Together, these details give the rider an ideal balance of open-class power with exceptional controllability. A large 270mm front brake disc coupled with high performance material and durable provides outstanding performance and control, with exceptional power stopping and controllability. The fork is simply outstanding. Yamaha fit the X with new transmission ratios that target off-road.

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Yamaha yz 250

Special — designed carbon fiber petals reed valve improve throttle response and engine performance across total microprocessor cycle. The cylinder head volume was increased from 21. Dunlop premium knobbies offer race traction and wear specifications. The compression ratio was reduced from 8. You would have to have a trials bike to do any better.

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Yz250 For Sale

Yamaha yz 250

The gearbox is a perfect combo of ratios for a five-speeder third gear being tight and matches nicely to an overdrive fifth gear, which gives it a versatile appetite for off-road. Then Yamaha thrust it into a market dominated by Austrian-built super-two-strokes. Most of our testing was done near sea level with mild temperatures, and those are the conditions that Yamaha must have targeted. It responds instantly and pulls hard through the midrange. All added up to the control of the rear wheels is a wonderful ride and sweet.

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Yamaha YZ250: review, history, specs

Yamaha yz 250

Together, these details give the rider an ideal balance of open-class power with exceptional controllability. Engagement is positive, with first being low enough to make pulling away from a standstill effortless. Powered by a high-capacity and ultra-lightweight, four-cell lithium-ion battery, the system adds minimal weight. Moving on, the two bikes are very closely matched. There are also changes in the shift mechanism and lighter clutch springs.

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YAMAHA YZ250X 2

Yamaha yz 250

Same goes for the shock, which also appears straight off the motocrosser but is fit with a spring rate and valving with a heart for trail carnage and for maintaining traction in rocky conditions. We credit less compression and perfect jetting. Handling and suspension rate very high, and the power is smooth, long and broad. This layout contributes to centralized mass for a lightweight handling feeling on the track. Enhanced Mass-Centralization The engine, aluminum muffler and compact fuel tank are positioned close to the machine's center of mass. New intake and exhaust ports work with a higher compression piston for a wider spread of power without losing top-end performance.

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