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2010 Yamaha YZ450F First Ride

Thursday, October 1, 2009

2010 Yamaha YZ450F First Ride
Yamaha says its all-new 2010 YZ450F is an revolution in contemporary motocross design. MotoUSA heads east to Budds Creek Motocross Park to put it to the test.
Life is all about complacency. It’s why you go through the motions during the week at your nine-to-five and the reason why motorcycle manufacturers' 450 Motocross machines look and perform so similarly to one another. Every so often one changes up something major in their life, whether it is a new career or girlfriend; likewise, every decade or so, a new motocross bike breaks the mold, offering riders something fresh and innovative. Yamaha did it with the launch of the original 4-stroke motocrosser, the YZ400F. Now, some 12 years later, Yamaha once again pushes the boundaries of both modern day motorcycle design and performance with the introduction of the 2010 Yamaha YZ450F.
More than just an update, next year’s YZ450F is an all-new platform which incorporates numerous innovative engineering tricks that we’ve never seen on a mass-produced Japanese motocross bike. It’s the kind of advance that comes when a motorcycle is engineered as a whole with complete synergy between engine, chassis and, most importantly, rider.
Providing propulsion is a cleverly designed engine that is more powerful and increasingly more compact than ever before. Its 449cc displacement remains the same but inside it utilizes more oversquare 97 x 60.8mm internal piston dimensions. This wider bore, shorter stroke format allowed engineers to reduce cylinder height by over a half an inch. Additionally, the cylinder is tilted toward the front center of the crankshaft. This keeps the connecting rod more vertical during the compression stroke, thereby reducing friction between the piston and cylinder. This translates into more efficient combustion force. A matching piston with a narrower skirt area boosts the compression ratio to 12.5:1 and the piston pin is no longer offset in relation to its center. The piston rings have been reshaped and have less tension on them which reduces both friction and oil consumption.
2010 Yamaha YZ450F First Ride
2010 Yamaha YZ450F First Ride
2010 Yamaha YZ450F First Ride
Almost everything is brand-new on the new YZ450F. The only components unchanged are the wheels, brakes and tires.

Yamaha’s venerable five-valve cylinder head design has been replaced with a conventional four-valve setup, which is claimed to be more suitable for low-to-mid-range engine power characteristics. Two huge 36mm intake valves are now located at the front of the engine, while two 30mm exhaust valves are situated rearward. All the valves are still constructed from titanium. The valve springs are now oval in shape (as opposed to round). Both camshafts have been reshaped in order to deliver more lift from each of the valves.
Fresh air is routed to the engine from the front of the motorcycle. This design delivers a straighter air intake pathway with cleaner, less dusty air. A flat foam air filter sits inside the airbox and is accessed by removing a total of six bolts which hold both the seat and fuel tank.
A forward-mounted 44mm Keihin throttle body receives fuel from a 12-hole fuel-injector (pulled from Yamaha’s line of YZF sportbikes). The FI system is battery-less and powered by the engine’s AC generator. It uses seven sensors including intake air and atmospheric pressure, coolant and air temperature, throttle position, crankshaft position, and a G-meter, which feed information in real-time to the ECU in order to deliver perfect fuel mixture, regardless of where you ride. Additionally, the G-sensor shuts off fuel if it detects the motorcycle is on its side for longer than 10 seconds. Furthermore, the fuel and ignition maps can be modified via a self-powered and handheld $279.95 GYTR accessory Power Tuner (part no. 33D-H59C0-V0-00).
Exhaust is now pumped from the back of the engine and pushed through a stainless-steel header equipped with a resonator (allows for more exhaust volume) that curls back to a length of over four inches. Gasses are funneled into an aluminum muffler, nearly twice the size of the previous design, which is mounted on the right-hand side of the motorcycle.
A new and very expensive looking twin-spar frame houses the engine nearly nine degrees behind its vertical axis. It’s comprised of 16 individual pieces of aluminum which allowed engineers to precisely tune each section of the frame for favorable feel around the racetrack. Swingarm rigidity was also tweaked. Between the top frame rails lies the 1.6-gallon plastic fuel tank which is translucent in color so it’s easier to view the fuel level during refueling. Both radiators have been lowered and tilted forward to assist in centering the bike’s mass without making the bike feel wider. Lastly, a plastic skid plate protects the underside of the engine from debris.
Suspension is a mix of old and new. The ultra plush Kayaba Speed Sensitive fork returns but gains additional stroke which brings suspension travel to 12.2 inches. The 0.47 kg/mm spring rate remains the same but the valving has been modified. Other changes inside the fork are a slicker parts treatment and a new oil seal shape. The fork is still adjustable for both compression and rebound damping.
2010 Yamaha YZ450F First Ride
The YZ’s extremely capable Kayaba suspension components have been tweaked for 2010. Overall performance is on a level no other production motocross bike can match.

What is new is the gas charged shock absorber, also made by Kayaba. It uses utilizes a larger 50mm piston and a reshaped, higher capacity nitrogen gas reservoir. The spring rate has been increased from 5.5 kg/mm to 5.7 kg/mm. Like before it still offers four-way adjustability for spring preload, high- and low-speed compression, and rebound damping. The shock is now positioned in the center of the bike, within the area that would typically be occupied by a conventional airbox. It provides 12.4 inches of movement and works though the same linkage as last year’s machine.
Other chassis modifications come in the form of a new top clamp with reduced offset to 22mm (from 25mm). This reduces the distance between the fork tubes and the steering head making the bike easier to steer. The clamp holds thick Pro Taper aluminum handlebars that have been repositioned lower and closer to the rider, but it still offers four positions of adjustment based on rider preference. Other ergonomic changes include the seat which is more level to help the rider ply their body fore or aft.
Visually, the YZ sports more sleek plastic body panels that accentuate both the engine and chassis and give it a futuristic look similar to its YZF-R series sportbikes. We think it looks awesome and really stands out from other manufactures' cookie-cutter 450 class offerings. Furthermore, a dark bronze surface treatment was applied to the engine’s side covers, fork legs and tube clamping surface designed to better resist scratching and normal wear and tear. 
2010 Yamaha YZ450F First Ride
The engines’ bottom-end power is just one area of substantial improvement over last year’s machine.

How it Works
Lifting this new generation 450 off its stand reveals that it’s still no featherweight. Yamaha claims that the bike has gained five pounds over last year’s, bringing it to 245 lbs with a full load of fuel. Hop aboard, and you’ll be pleased that its width is exactly the same as last year. This is a big plus, considering the trend for this style of motorcycle becoming increasingly narrow. The cockpit is spacious for a six-foot-tall rider, though we do wish the handlebar was mounted higher. Fortunately Yamaha provides a $98.95 accessory GYTR Tall Bar Mounts option (part no. 33D-F34D0-V0-00)  that raises the handlebar by 5mm.
The engine starting procedure is now as simple as jumping on the kickstart lever as both the fuel on/off switch and handlebar mounted hot start lever have been eliminated. If you’re lucky (or if the piston is at top-dead-center) the engine will fire right to life. If it isn’t at that sweet spot it’ll take an extra kick or two to get it fired. A cold start aka fast idle knob is located on the throttle body for use in cooler conditions.
The venue of choice for our ride introduction was Budds Creek Motocross Park in southern Maryland. The same east coast racetrack that the pros bar bang around in the AMA Motocross series and the site of the 2007 Motocross of Nations. In terms of track preparation, the folks from Budds went all-out, completely leveling the track each morning. Some overnight rain on the second day kept the track tacky and moist.
Out on track the first thing one observes is just how peppy the new engine is. Budds has numerous steep climbs that really load the engine and expose any shortcoming. We came away really impressed by not only how powerful the engine is but how easy that power is to use. Power comes on now, now, and NOW! Granted, lack of traction certainly wasn’t a variable at Budds Creek, thus as soon as you crack open the throttle, the YZ‘s 120-series Dunlop tire digs into the earth driving you forward hard. 
2010 Yamaha YZ450F First Ride
Despite weighing 5 lbs. more than last year, the new YZ450F feels lighter and more maneuverable in the air.

Bottom-end is stout and transitions seamlessly into an even more impressive mid-range. Yet the engine produces power in a ridiculously linear fashion that doesn’t catch you off guard or feel like its going pull your arms off. It’s very robust feeling and feels on par with the current 450 class reigning power king, the Kawasaki KX450F. Again, the fact that the bike isn’t too narrow provides the rider enough surface area to comfortably squeeze the bike thereby locking you in place during wide-open acceleration.
In terms of overall excitement and sheer thrill factor, Yamaha continues to up the ante with the new YZ450F. Its engine features a unique character and during acceleration the roar from the front intake is unlike anything else on the dirt. It overwhelms the exhaust note and makes you feel like you’re moving way faster than you probably are.
The Yamaha’s 5-speed transmission, clutch, and versatile final drive gearing complement the engine perfectly. The transmission is both precise and tight feeling without a hint of slop. At times, however, it was difficult to upshift during full throttle acceleration. Neutral was also a bit tricky to find. Perhaps some more break-in time will remedy both issues. Clutch lever pull is wispy and overall feel is excellent. Gearing was equally remarkable and we never felt like we were between gears on any section of the track.
When barreling downhill, the Kayaba suspension pieces are the definition of plush. Not only do they soak up the rough stuff, it keeps the chassis completely in-line during aggressive deceleration. Also of note is just how balanced the suspension is front-to-rear. Furthermore, both the fork and shock offer precise damping adjustment. We also love the bike’s extra-wide footpegs which aid your body in soaking up jump landings. Equally effective are both the front and rear brakes which are more than capable of dissipating downhill momentum despite being one of the few components that remain unchanged for 2010.
2010 Yamaha YZ450F First Ride
The YZ retains its friendly ergonomics packing including its thick Pro Taper handlebars and humungous footpegs.

Besides engine performance, the most notable feature of the new Yamaha is the way it steers. Simply put, this is the best handling production 450 motocross bike we've experienced. Seriously. The YZ turns like no other motocross bike I’ve ever ridden. In fact, it handles so differently, it takes your brain some time to acclimate to its unique steering manners. Initiating a turn is almost effortless, yet at the same time the front end is extremely precise - never turning more or less than what the rider asks. The bike carries its weight low and doesn’t exhibit a hint of top-heaviness that is typical with other big-bore off-road bikes.
Dip into a turn and the front tire offers a ridiculous amount of bite. It’s as if there is 80 pounds of lead ballast directly behind the front wheel. Pick a line, steer the bike and it rolls right in as if you were playing a video game. Once turning, the chassis settles immediately. Fan the clutch lever and tug on the throttle and the bike zips right out of the turn while maintaining its trajectory, resisting the urge to stand up too much or run wide. Recommend rider sag is between 100 and 105mm. We set it at 104mm and had zero complaints in terms of how quick it steered or its outright stability through faster, third-gear sections of the track. It’s simply astounding how nimble it is without compromising stability.
2010 Yamaha YZ450F First Ride
Believe the hype. The 2010 Yamaha YZ450F performs as well as it looks. Pictured above is the optional Red/White color scheme that comes with black wheels and a gold chain. It costs $8090 and will be in dealerships in mid-November.
Believe the Hype
Every year, new bikes come and go. But after riding this latest YZ-F, it proved to be something special. It’s a radical departure from the status quo within the off-road motorcycle realm and it just plain works. Not only is its engine powerful, it’s friendly and easy-to-use. Handling is as accurate as a sniper's bullet, plus its ergonomics package allows one to fully take advantage of the bike’s phenomenal performance. But the most astounding feature is price. Even with its use of expensive, cutting-edge technology, the price tag comes in under eight grand. Not to mention Yamaha is the only manufacturer to stand behind its product with a 30-day warranty. Of all the new bikes I’ve ridden recently—both on the street and the dirt—this YZ is without a doubt my new favorite. Thank you Yamaha for building the perfect 450 MX’er.
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Yamaha YZ450F Dealer Locator
2010 Yamaha YZ450F Technical Specs
2010 Yamaha YZ450F First Ride
2010 Yamaha YZ450F
Engine: 449cc liquid-cooled Single, DOHC, 4-valve
Bore x Stroke: 97 x 60.8mm
Compression Ratio: 12.5:1
Fuel Delivery: Fuel-Injection
Clutch: Wet multi-plate, cable actuation
Transmission: 5-Speed
Front Suspension: Kayaba Speed Sensitive System 47mm fork, 20-position compression and 20-position rebound damping adjustment; 12.2 in. travel
Rear Suspension: Kayaba gas charged shock, 20-position low-speed and step-less high-speed compression damping, 20-position rebound damping and adjustable spring preload; 12.4 in. travel
Front Brake: 250mm petal disc, dual-piston caliper
Rear Brake: 245mm petal disc, 1-piston caliper
Handlebar: Pro Taper 
Front Tire: Dunlop D742FA 90/100-21
Rear Tire: Dunlop D756 120/80-19
Curb Weight: 245 lbs. (ready to ride)
Wheelbase: 58.7 in.
Length: 86.3 in.
Width: 32.4 in.
Ground Clearance: 15.0 in.
Seat Height: 39.3 in.
Fuel Capacity: 1.6 gal.
MSRP: $7990 Team Yamaha Blue/White; $8090 White/Red 
Yamaha Factory GYTR Accessories
When it comes to purchasing accessories for your Yamaha off-road bike you have plenty of options. Yamaha makes your decision making process easier by offering an entire line of genuine accessories that are engineered  manufactured  and tested in house ensuring you the highest quality  best performing parts for your new YZ motorcycle.
When it comes to purchasing accessories for your Yamaha off-road bike you have plenty of options. The Tuning Fork guys makes your decision making process easier by offering an entire line of genuine accessories that are engineered, manufactured, and tested in-house ensuring you’ll have the highest quality, best performing parts for your new Yamaha YZ motorcycle.

For those looking for more engine power, there is a Ported Cylinder Head Assembly (part no. 33D-E11BO-VO-00) that is identical to the part that will be used on James Stewart’s No. 1 plated factory Yamaha YZ450F Supercross bike. For its $1,999.95 price you get a fully assembled cylinder head that’s ready to bolt-on to your motorcycle. Power increase over stock is substantial, with a claimed 20% gain in horsepower from as low as 3900 rpm. Additionally, a high compression piston kit is available as is clutch and exhaust components.

Chassis parts are also offered and include a more durable $124.95 aluminum Enduro Skid Plate (part no. 33D-F14B0-T0-00). Additional peace of mind comes in the form of an aluminum Water Pump Guard, Radiator Braces, and Folding Clutch Lever and are available for those who foresee the need for extra protection. For more information or an entire parts list click here or visit your local Yamaha dealer.

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john edward aranas -akp  May 13, 2010 08:35 AM
i like this one but i dont have mony yet i love to dreve this one i hope i can have this one but the problime is that im living in the philipines actually this is my sport bt i only try ride 25o i realy want to have this one f someday i have mony and i always pray that my dreams can true coz i know i cnt afford 8 but i will do my very best to have this one....wardx_akp@yahoo.com enjoy riding and destroy the way riding this one YZ450F...INJOY
Chris -i got one....  May 10, 2010 04:21 AM
best bike ever invented...will tear up anything and everyone in its path, the thing is a beast.....and has many GYTR acc. to make ur head spin.....the GYTR power tuner is awesome...def need one if u own that bike....ive cleared everything from 70 ft triples to 130ft tables in 4th gear....will never get rid of this bike.... oh yea, and it starts on 1 kick everytime.....read the owners manaul if you dont know how to start a 450 hahaa
Rich Snyder (RL155) -My results  May 1, 2010 07:58 PM
I have had the pressure of riding an 010 YZ450F and wow what a great bike. Yeah, it did take alittle kicking to get used to how to fire it up, but nothing I couldn't do or anyone else. Sitting aboard the flagship I quickly noticed how flat the seat was and how the shrouds came out, I was worried it might effect me, but not at all. I rode it around for about 5 laps and all I can say is its the best bike ever for turning. The low and mid was great, but the high fell off a bit. It handled good, but not super great. I actually think the handling was no different than the 08 or 09 and I personally think the 09 handled better. I like I said before this is the best turning bike ever. You can't really say much about the jumping end of it cause its a 450 and you can clear anything on a 450. I've rode the honda 09 and Kawi 09 and they don't even come close and I can't image there 010 being much different. I'm all Yamaha all day long, but I wouldn't own one for 8 grand. Not when I can get an 09 for 4k and an 08 for 3K. Though I wouldn't mind owning one if it was 6K. These new bikes are just too much in cost in my opinion. They don't seem worth the price tag to me. I'll stick with my 03 and 08. Thanks.
stoutman450f -Tim B's comment  April 17, 2010 11:01 PM
I think .... I have one. and you ...... are WISHING YOU had one.

bash if you will. You probably have a hard time starting a 450F.

Hah! Mine is white and really BAD ASS!
Stoutman450f -Like Mike D, I've been a Y amaha fanatic for 39 years!  April 17, 2010 10:49 PM
We have in our garage:
06 Yz 450f, 06 yz250f (my 13 yr old daughters new bike TODAY)03 yz 250f, 02 ttr125L, 05 ttr90 and a 94 2 stoke 50cc.

plus a 07 yamaha V star 1300.

So today we bought 3 new.
2010 YZ450F
2009 YZ450F for my wife - yes she is fast.
2009 TTr110 for my 8 year old daugher.

Like Mike D - YAMAHA is the best - no question. I even have a 3500 generator with an invertor! They are the best with innovation ( as we have seen with the 2010) I am going to twist a grip tommorrow at the shop owners' track. I have no doubt it WILL be the fastest/badestest/rippinest bike there..... ANYWAY. Yamaha is the best... period. I've been challenged by all the "showups" that are fast and they are usually left in the .... well - trying to figure out where the trail is... Mike M - you are now my inspiration. I learned from a guy who at 67 kicked everybody's butt on an old suzuki 400.

I will be the same guy "the boyz" think the old man is slow..... I'm stoked to rip the new 2010 tomorrow.
speed demon -HELL YEh!  March 17, 2010 01:03 PM
everyone who is sick of yamahas suck.. that is the best brand of bike you will ever get. every other bike will break down..
ian worrall -mx racer  January 26, 2010 01:58 AM
The bike realy is awsome ! BUT I predict the engine will go back to a conventional set up in the future I feel this bikes performance comes from the fuel injection and short stroke materials tecnology have renderd reliable. there is nothing new under the sun. rudge the british bike company had 4 valve heads in the 1930s and triumph twins were made to race with reversed cylinder heads particularly in twin engined drag bikes
v-millz -need a ride  January 14, 2010 08:16 AM
Dave -YZ  December 26, 2009 06:55 PM
Thats the thing though. Its a great bike don't get me wrong. But like said below it should be mention this isn't the first time a reverse head has been used. Cannondale did do it. They didn't do a great job of it. The 440's where awesome at the time but 10 years ago 8000$ seemed like a ton for a dirtbike. And cannondale didn't have the support like yamaha. Great bike just way ahead of its time. Its cool to see yamaha is refining there technology.
Blue Heater -Hey fatso!  December 25, 2009 10:53 AM
Blah blah blah. All you negative guys claiming other brands need to suck an egg. Or eat another egg to fill your fat waist lines. Seriously, own up to it. You're fat and slow and no matter what you ride or how fast your bike is, you'll always be fat and slow. So keep bashing the most innovative bike on the planet and suck dust.
Rachel -The YZ450F  December 10, 2009 04:32 PM
Great article. But I think you guys need a new editor. There are words missing in some of your sentences. Guess you were so excited about the bike you skipped the editing and went straight to post.

RT Rider -Yamaha XT660Z Tenere  December 1, 2009 06:49 AM
I wish Yamaha would import the XT660Z Tenere into the U.S. I would have one in my garage for sure.
Steve P -Can you say Cannondale?  November 27, 2009 05:40 PM
Cannondale had a similar motor and EFI Almost 10 years ago. Everyone thought they where crazy.
Big John -450 vs 500  November 23, 2009 04:58 PM
The yammy is a good handlin' bike I'm sure,but wont come close to my old kx500.
m serna -2010 yz 450  November 22, 2009 04:32 PM
I was there when they put the new Yamaha 2010 YZ 450 on the dyno. It kicks the shit out of all the other 2010 bikes. Its power delivery is crazy. When Yamaha claims numbers, they actually do it. Not like Honda last year that fell short of their claims.
HB (Honda Boy) -2010 YZF450  November 18, 2009 11:55 AM
Hey this things pretty cool, I'd have one over a RMZ or KXF any day !!
austin robson -2010 yamaha yzf 450  November 12, 2009 08:25 AM
it is the same as the rest of the yammies... crap
Mike D -Wished it was a Yamaha  November 11, 2009 07:19 PM
Ive been ridding for 42 years. Ive had every brand of japanese bike out there. I have found Yamaha holds up beter and is more reliable than the other japanese brands. So ride what you will but when your sitting on the side of the track or out in the middle of the desert with a broken down bike I will bet you wished you was ridding a Yamaha
Mark M -Look at the whole picture !!  November 5, 2009 03:59 AM
C'mon Tim B, just because your Kawasaki won't cut it does'nt mean you get to bash Yamaha's innovations, I guess opinions are like "Butt Holes" everyone has one!
frank ortiz -yzf bikes  November 2, 2009 03:08 PM
yamaha is the best always runs like a champ
BIg Ron -FI for a trail bike  October 29, 2009 05:51 PM
Any ideas on how this thing will work as a trail bike with alot of changes in altitude; going from 5K up to 10k+ and back. I was talking to a Kawasaki dealer at the EnduroCross in Denver about using the KX450 as a trail bike; he indicated that the FI didnt work well on a trail bike because the lack of speed limits the feed back to the computer to a point that it doesnt adjust. I have heard of this on the Honda as well; any input?
subhendu K.jena -yamaha  October 20, 2009 12:16 AM
i like that .it was good looking
Tim Y -Yamaha did it this time as they have done before !!!!  October 18, 2009 03:27 PM
with the 2010 yz450f and all of the features added this bike will sell, this bike will be placed on top again because of james stewart. But stewart could get on any brand of bike yam,hon,kaw,suz,hell even ktm and whoop some candy a**es. what everyone needs to realize is that back in the older models like the 2003 to 2005 yz450's they had all kinds of problems, and honda,suzuki,and kawasaki took advantage of this and downed yamaha but now look where they are at there bike cant compare. From 2006 till now they have been they only company with under 5 little glitches in them and none after 2006 had anything to do with the motor. the 2010 is what i expected from a leader in the sport and honda has been really slacking, suzuki is just a follower (suzuki got lucky only when they produced there ltr450r quadracer ) kawasaki i guess u can just say forget it they just suck.i have riden even make of bike and raced every make of bike, yamaha is the way to go no ?'s asked....
y605 -STALLER!!!  October 11, 2009 05:52 PM
Yamaha has allways been known for the stalling. I've never ridden a bike that stalled as bad as the yz450f. I just wander if they finally got there head outta there a## and fixed the biggest problem of all.
kd133 -done before but never as mainstream  October 7, 2009 11:46 PM
So to all you haters, what Yamaha has done is not 'new' but it is for our sport, and it is one of the big brand name manufacturers thinking outside the box and making an engine that not the norm.........take it or leave it but if you wait for honda or anybody else to catch up, you'll be waiting till 2012 or 2013 to see something similar.......Kudos to Yamaha to bring in the Revolution of new motors, not just sit on car design of 20 years ago ;) Go Yamaha! I've been out of racing moto-x almost 10 years and I'll probably be setting my order soon to kick some a++ in 2010 and beyond!
gustavo -el ordo  October 2, 2009 06:51 PM
na rre buena la pagina aguante el motocross
Jimmy J. -the blue team  October 2, 2009 05:14 PM
This is the best looking dirt bike of all time plus it performs. I'm definetly trading in my Suzuki RMZ for this one.
yamahaha all the way -corner at 1:05 of vid  October 2, 2009 11:01 AM
a stock bike blasting out of a corner like that?? just phenom. keep up the impressive work yamaha
Graeme -NICE  October 2, 2009 01:06 AM
I love my CRF450R, but this new Yammie is Awesome, I love that they're brave enough to do something Different, and it's cool that it improves the bike. Although I'll stick with my CRF, I'll just wait for them to make a better bike, the way they always do... even if it happens in 2012.
Brad -YZ  October 1, 2009 10:13 PM
The new 450 looks awesome!
wrnut -oh ten yamie dream bike  October 1, 2009 06:14 PM
Yamaha only gets praised because their innovation continues to guarantee, reliability and quality, from year to year by battling their own kinks instead of worry about what other brands are doing. i can't wait for the WR version. i always hated the high center of gravity feel on the older yamaha 4 strokes. does this bike really have video game tracking style though? lol good report..must be nice to know how all the different brands ride. you forgot to say 'anything' in this sentence. Its engine features a unique character and during acceleration the roar from the front intake is unlike else on the dirt.
R3 -Regarding the Article and the Boys in BLUE  October 1, 2009 11:17 AM
TIM C -Opinions about YZ450f  October 1, 2009 11:07 AM
Oh come on, besides the new plastics, looks great or not, whatever!! one thing is true, I never had a bike, so trustable as YZ450f. Good motor and power. I know this isn't the most powerful machine, but unquestionable is a winner machine, low cost maintenance and very fiable, much more than hondas, even more kawasaki's and ktm. At least the mine, is only gas and oil...
Think better next time!! and according the motorcycle-usa, this model will dominate the market.
Kevin -poor Tim B  October 1, 2009 10:44 AM
I'm guessing what he really meant to say is, "I can't have one and it sucks!"

Either that or he's the owner of an '09 CRF450!
Tim B -Hold the Appraise Please!  October 1, 2009 09:28 AM
What is Yamaha thinking? They have that ugly flat black, textured plastic on their races bikes and quads. It looks hideous!

And I'm sick of Yamaha being praised for innovative features never seen before on production bikes when that's just not true! I know the word Japanese was added this time, but the "backwards" engine has been done! So has cylinder slanting.