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2011 Yamaha YZ250F First Ride

Monday, September 20, 2010


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2011 Yamaha YZ250F First Ride Video
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See us rip around on Yamaha’s new four-stroke dirt bike in the 2011 Yamaha YZ250F First Ride Video.
After receiving a substantial redesign this year (find out all the changes in the 2010 Yamaha YZ250F First RideYamaha chose to reintroduce its YZ250F motocross bike as a 2011 model. The changes are minimal with the exception of new color combinations and a slight increase in price. After a few days of pounding out motos at the fast and rough Glen Helen Raceway and the tighter layout of Piru Motocross Park, the quarter-liter YZ-F continues to prove to be an excellent dirt bike, especially for novice or vet riders seeking a 250F that is easy to ride.
 
Hop onto the seat and the YZ doesn’t feel as teeny as other bikes in its class. This makes the cockpit more accommodating for riders of above average height. The ergonomics aren’t too tight plus the bike’s fit can be tailored by adjusting the position of the Pro Taper handlebar. To do this Yamaha machined four holes into the top clamp. We utilized the forward mounts with the bar clamps reversed which places the bar in the second-most forward position.

This allowed us to scoot forward on the seat thereby placing more weight on the front of the bike for even better turning.
Other nice touches are the shape of the seat with gripper material on the sides and the humongous foot pegs which help provide a nice platform to work from as well as distribute energy load when landing off obstacles. Lastly we also appreciated the curvature of the radiator shrouds that not only look cool but are shaped in such a way that it’s almost impossible to hook your leg or boot on it.
Test rider Chris See shows a berm whos boss at Glen Helen Raceway.
The 2011 Yamaha YZ250F is powered by a 250cc liquid-cooled Single. It is the only Japanese 250F to still use a mechanical carburetor.
The 2011 Yamaha YZ250F is available in two colors  Team Yamaha Blue White pictured  and retails for  7150 -  7250 with a 30-day warranty.
The 225 lbs. Yamaha offers an elevated level of agility on the ground and in the air.
(Above) The Yamaha’s mild powerband, excellent chassis and Bridgestone rear tire assist it in hooking up out of corners. (Below) The 225-lb Yamaha offers an elevated level of agility on the ground and in the air.

Although the Yamaha still employs a conventional carburetor it works well even compared to the current crop of fuel-injected 250Fs. A choke knob needs to be pulled when the engine is first fired in the morning. Then it can be started within one or two prods of the kickstart lever. Once warm, the engine can be re-lit without the choke, however the handlebar mounted hot start lever needs to be depressed to aid in hot starts.

Carburetion proved to be spot-on and the engine responded instantly when the throttle was twisted. The only time we ever experienced any hesitation is if you ride in too high of a gear and slam open the throttle at very low rpm. Otherwise it ran well.

Out on the track the engine delivers healthy acceleration right off the bottom. It feels strong but at the same time it isn’t so powerful that it overwhelms the rider or the rear Bridgestone tire. The engine spools up quickly, but as rpm increases the powerband remains flat without a hint of hit or power rush typical of 250F-class motorcycles regardless of rpm.

“The engine has great bottom to mid-power. It pulls well right out of the corner but once you get going it feels flat up top,” commented our test rider Chris See. “Its powerband feels like the exact opposite to other 250Fs. But I think it will be good for someone who is just starting to ride or maybe a vet guy. Even though it isn’t fuel-injected it actually runs really well and didn’t bog for me.”

Considering how linear the powerband is it can be easy to dismiss the YZ’s engine as being slow. But it’s not. It’s just builds power so smoothly that it’s deceptive. In a way the engine feels like an electric motor with its immediate power delivery. However rather than twisting the throttle harder to accelerate you instead need to upshift and work the transmission to gain speed.

Speaking of the gearbox, it works without flaw offering a positive feel during engagement even when loaded while motoring up Glen Helen’s notoriously steep hills. Equally as pleasing is how light and responsive clutch action is, though our pro test rider said it faded slightly at full-on race pace. To compensate the rider has to adjust it with the plastic quick adjust knob while riding.

Without question the highlight of the new YZ250F is its chassis. Compared to other 250Fs where you can get away with being a bit further back in the seat while turning, the Yamaha responds best when the rider scoots his body all the way to the fuel filler cap. When done so it changes direction with high level of precision. However, if you sit farther back in the seat the bike resists quick direction changes and plows through turns so correct body positioning is important.

Once initiated the bike steers predictably never turning more or less than what the rider inputs through the handlebar. The rear end of the bike feels in sync with the front, squatting nicely and resisting the urge to compress aggressively, buck, or slide out even at an elevated pace. Even at higher speeds the chassis continues to serve up a level of stability that other bikes wish they could match.
The 2011 Yamaha YZ250F ergonomics are well thought out and can accommodate a wide range of riders.
One of the best features of the 2011 Yamaha YZ250F is how easy it is to ride for all level riders.
One of the best features of the 2011 Yamaha YZ250F is how easy it is to ride for all levels of riders.

Suspension-wise the Yamaha employs a two-way adjustable Kayaba Speed-Sensitive fork and four-way adjustable Kayaba shock absorber. A common complaint for heavier and/or faster riders is how soft stock 250F suspension is, but the YZ250F’s set-up actually performed well even for the speed of our test rider. The suspension settings front to back are well balanced and the bike doesn’t pitch or squat excessively despite being undersprung for our 170 lbs pro-level test rider.

“Handling was great,” says See. “The rear end was good; nice and planted. For me I’d probably need heavier spring rate in the fork and shock, but the valving still felt good—I probably wouldn’t need to change it. The suspension is supple initially then has a fair amount of damping as you get deeper into the stroke.”

The OE-fitted Bridgestone tires offered a fair amount of traction in the sand and loam at Glen Helen and even in the afternoon hard pack at Piru. While the Yamaha’s brakes serve up a high amount of feel they don’t have a whole lot of power which occasionally caught us by surprise when bombing down some of Glen Helen’s downhills. Braking power was consistent though even under hard and repeated use.

Overall we really enjoy riding the new YZ250F. While we weren’t exactly wowed by the outright power of its engine—it is very useable making the bike easier to ride for longer. What we did like is its well-sorted chassis and pleasing ergonomics which help make it an effective motocross bike on the track. It’s also important to note that the Yamaha is the only bike to come with a 30-day warranty against manufacturer defects, not to mention the $3 million of contingency up for grabs at 90 racing events in 2011. Yamaha is also the only manufacturer to offer its 250F in two colorways: Yamaha Blue/White for $7150 or for an extra $100 you can get it in White/Red with black wheels and a gold chain.
2011 Yamaha YZ250F Photos
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2011 Yamaha YZ250F Specifications
Engine: 250cc liquid-cooled Single DOHC; 5-valve
Bore x Stroke: 77.0 x 53.6mm
Compression Ratio: 13.5:1
Fuel Delivery: Keihin FCR MX37 carburetor
Clutch: Wet multiplate; cable actuation
Transmission: 5-speed
Final Drive: Chain; 13F/49R
Fork: Kayaba Speed-Sensitive System 47mm  fork; 20-position compression and 20-position rebound damping adjustment; 11.8 in. travel 
Shock: Kayaba gas charged shock, 20-position low-speed and step-less high-speed compression damping, 20-position rebound damping and adjustable spring preload; 12.0 in. travel 
Front Brake: 250mm wave disc, dual-piston caliper
Rear Brake: 245mm wave disc, 1-piston caliper 
Front Tire: 80/100-21 Bridgestone M403
Rear Tire: 100/90-19 Bridgestone M404
Curb Weight: 225 lbs.
Seat Height: 38.9 in
Wheelbase: 57.7 in
Ground Clearance: 14.8 in
Fuel Capacity: 1.7 gal
Colors: Team Yamaha Blue/White; White/Red
MSRP: $7150 - $7250
Warranty: 30-day 
2011 Yamaha YZ250F Highs & Lows
Highs
  • Easy to ride
  • Excellent chassis - turns well and is stable
  • Suspension works for a wide range of riders
Lows
  • Engine could pump out more power
  • Brakes don't offer a lot of stopping power
  • Clutch fades during hard use
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Comments
adam - motousa -fuel injection  September 28, 2010 03:20 PM
in my opinion i like the way 250Fs run without fuel injection. if you get the jetting perfect they don't really bog and the character of the powerband is much more fun than a FI 250f. save FI for 450s only.
enduro fan -re:mx4ever  September 25, 2010 06:51 PM
Well said mx4ever! I'm a huge Yamaha fan, but am slowly going the way of the KTM. I don't understand the technical building of bikes, as i'm not mechanically minded, and I'd rather ride than fix, but I ain't gonna fall for sleek, graphics and plastics. I only hope Yamaha isn't progressing certain models every year only because they have something better in the works.
mx4ever -Demand more  September 23, 2010 11:18 AM
From these lazy and greedy manufacturers. Look at them, Year after year, they come with plastics and little white or black here and there. They charge us big bucks. Watch all other tech world products like, Cars, PC, Super bikes, Etc. They all change and improve darstically year after year, Or at least every couple of years. MX bikes ? Same old spokes, Shocks, Rims and the oldies. And for the yamaha, Not even an FI ! They hit us with the 4T. We must all get to gether and demand more from them. Don't buy new bike unless you see an big improvements. Money will motivate them.
Mick -I'll wait....  September 20, 2010 07:39 PM
No Fuel Injection, fail. Get with the times Yamaha.