Five-speed gearbox provides maximum flexibility and the right gear for a wide range of riding environments. Ask any motocross rider where races are won and lost and odds on he’ll tell you its all … Yamaha has redesigned YZ450’s swingarm for 2009 and this not only lightens the chassis, but also ensures great traction and inspires confidence during high speed corners. Fuel Capacity: 1.8 gal It is very easy to get caught up by the new Yamaha YZ450F, and the entire lineup actually, as you think at how great the 2008 model year proved being and how it could be improved. To settle are arguing … - All Rights Reserved, � Copyright TopSpeed. Adaptive and very easy to ride, this racer won’t scare anybody with its engine’s jerks or anything like it at all. Yamaha YZ450F Performance: Top Speed - Acceleration 0 to 100 km/h (0 to 62 mph) - Acceleration 0 to 400m (1/4 mile) - Recuperation 60 to 140 km/h in highest gear - Fuel Consumption - MPG - Economy - Efficiency - CO2 emissions - Emissions - Yamaha YZ450F Electrical Systems, Ignition and Equipment: Ignition Type : TCI : Electrical Details - Starter Type … New clutch lever is shorter, stronger, and lighter, with a lever position adjuster to accommodate different riders. Premium drive chain has gold colored plates for outstanding looks. Since the fuel tank is actually below the seat, the fuel-tank bump is very slight and only big enough to accomplish its new mission in life as an air-cleaner cover, which is notnew but still cool. So just under 80mph would be the top speed of a 450f. You can easily jump from an YZ250F straight on its seat and feel well at home with the riding characteristics while the performance is at a whole other level. Primary kickstarting with automatic decompression and convenient, handlebar-mounted hot start lever ensures easy restarts. 998 mm (39.3 inches) If adjustable, lowest setting. More weight savings come via two-piece (part aluminum, part plastic) engine protector plates and thin-walled engine guard construction. Removable aluminum rear subframe constructed of square-section tubing for light weight and easy maintenance. And it very well did it as the Blue and White version comes with a suggested retail price of $7,399 and the White and Red with only $100 more. It features a redesigned swingarm as well as redesigned suspension linkage together with it. Compression Ratio: 12.3:1 Engine Type: 250cc liquid-cooled DOHC 4-stroke; 4 titanium valves; Transmission: Wide-ratio constant-mesh 6-speed; multiplate wet clutch; L x W x H: 85.2 in x 32.5 in x 50.4 in; Seat Height: 38.0 in; Maximum Ground Clearance: 12.8 in; Fuel Capacity:2.0 gal ; Wet Weight: 249 lb; 30 Day (Limited Factory … Either Team Yamaha Blue/White or White/Red colored, it was the first thing that stood out on the tracks at the end of 2008 as it got a decent head start. Look at the radiator shrouds and where the gas cap usually is and you’ll get confused as it looks wide. Lightweight front-wheel hub for reduced unsprung weight and increased durability. On the topic … Yamaha MT-07 Review Top Speed; Yamaha YZ250FX Key Features. Displacement: 449cc In order to handle as well as it accelerates, the YZ is now equipped with adjustable racing ProTaper aluminum handlebars and Excel wheels, as well as a gripper seat to keep that enthusiastic rider in place. The original yz450f has a 4 speed. In the motocross arena, Honda stands out with their 2009 CRF450R. But what amazes about the YZ45F is that it doesn’t show off its racing DNA if you’re not doing any efforts for that matter. Quick adjuster makes maintenance easy. First of all, there’s the chance that you YFZ has a speed limiter that will not let you reach top speeds. If design would have had everything to do with the decisive vote, the Yamaha YZ450F would definitely occupy the first place as it is a very compact bike that has its body panels, seat and rear fender perfectly blended in one together with the other in a comma shape. Ground Clearance: 14.7 in The 2015 Yamaha YZ450F is ready to attack the toughest tracks without baking down and there is no wonder why, as in the latest year it … 1998 is the year when the big Japanese manufacturer launched the R1 and also when the YZ400F was born from the need to replace two-stroke bikes on the motocross tracks. In this version sold from year 2009 , the dry weight is and it is equipped with a Single cylinder, four-stroke motor. Works-style clutch lever features oversize barrel adjuster for easy, on-the-fly adjustability of lever/cable play. Top Speed - Acceleration 0 to 100 km/h (0 to 62 mph) - Acceleration 0 to 400m (1/4 mile) - Recuperation 60 to 140 km/h in highest gear - Fuel Consumption - MPG - Economy - Efficiency - CO2 emissions - Emissions - Yamaha YZ250F Electrical Systems, Ignition and Equipment: Ignition Type: TCI: Transistor Controlled Ignition : Electrical Details - Starter Type: Kick : Instruments - … Price: 6,990 . Price: 7,399. Top Speed Of Yamaha YFZ450R As I said above, the top speed of a YFZ450R on a straight line is going to be around 75 MPH, but you may not achieve that if you try reaching that velocity in real life. Suzuki claims to have improved aerodynamics for 2009 so their biggest RM should be a smooth flying bike on the motocross track. We have to call it a great overall motocross bike as it invites you to ride, it is consistent in delivering power and it knows how to deal with that power. The special edition color is inspired from Assen TT-winning MotoGP bike. Suspensions must be top notch and the riders properly accommodated through a great ergonomic triangle. I rode alot with a good friend of mine who had a 06 yz450f and he always had me by about 10mph faster. There was a slight … Wide (55mm) footpegs provide excellent boot traction and rider comfort. There are about 15 significant changes to the hard parts in the 2020 YZ450F motor. Not bad at all! Last post . Thanks Also in 2006, the YZ saw the aluminum single backbone frame and a 10 pounds weight reduction together with it. Everything else is considered detail work for the masterminds with the drawing board in front of them, but the marketing department must really do its job in order for the bike to sell. To boost top-end power on the 2018 YZ450F, the engine gets a new piston. I mean, just look at it from the side; it clearly gives a big clue on its track performance from a very first glance. … Anonymous (not verified) Speed...YZ250 vs. YZ450F . In this version sold from year 2010 , the dry weight is  and it is equipped with a Single cylinder, four-stroke motor. But if anyone could tell me a top speed that would be great. The KTM has a more roomy layout. Motorcycle Consumer News reported a tested top speed of 176.7 mph (284.4 km/h). So they make sure that they have a strong pulling and sharp handling motorcycle, a real opponent both for the Yamaha and the rest of the Japanese crowd. Final Drive: Chain Drive, Suspension/Front: Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel The head is 10mm shorter from bottom to top, even though the valve angle is steeper, allowing more room in the ports. New rear wheel hub is lighter and designed for the larger 25mm diameter axle (up from 22mm), helping to achieve the overall rigidity balance of rear suspension components. Length: 86.4 in Me and my friend are debating this. As for stopping power, the Yamaha YZ450F braking system includes Single disc size 250 mm (9.8 inches) at the front and Single disc size 245 mm (9.6 inches) at the back. 2020 Yamaha YZ250 Top Speed Rumors – Modern, aggressive design, including front fender, front figure plate, radiator condoms, side number plates, air box, rear fender, and fork guards, as well as rear brake disc protector, rear brake protector calipers and wider foot wedges – just like 4 -Strokes. The Light Aluminum … 2 posts / 0 new . Below the fauxtank we find another drastic change from the previous gen at … 449cc, five-valve, DOHC, liquid-cooled engine is super-powerful yet tractable. The brakes are very powerful and reassuring as well, but this won’t amaze you as much the fact that the front suspension won’t bottom out even where you’re expecting it too. Introduction ... motocross four-stroke singles don’t feel most at home on top of their power bands, but YZ… With this drive-train, the Yamaha YZ450F is capable of reaching a maximum top speed of . And if there was nobody to compete with, it would have done it with itself and we’d still be writing about it. ProTaper® aluminum handlebar for strength and performance. Wheelbase: 58.8 in Even though not as close to the Italian stylish look Japanese builders keep trying to dethrone, the bike looks clean and easily stands out from the now last year’s model. We recently got the opportunity to experience the performance of a 2009 Yamaha YZ450F, but until sharing our impressions with you, let’s see where the Yammie is coming from in order to easily understand where it’s heading. wot. The bike was still picking up speed as I past the stand in 6th gear. Suspension/Rear: Fully adjustable single shock; 12.3-in travel KX450F Top Speed. Yamaha YZ65 Motorcycle 6-speed, close-ratio transmission optimizes gear ratios for maximum performance, giving … Front brake hose clamp is now aluminum, greatly reducing its weight. Stock gearing. Newly designed swingarm is lighter and helps to achieve excellent rigidity balance for superb cornering and rear wheel traction. Seat Height: 38.9 in Introduction. Lightweight suspension linkage is redesigned to match the new swingarm. The YZ450F uses a battery-less fuel injection system with a 12-hole injector for superb fuel atomization. A next big revision was to come together with the 2008 model year. I couldn't tell if I was going as fast as the bike could go because I was on pavement and the radar was located in the middle of an "S" turn. Yamaha YZ65 Motorcycle wave-style brake rotors are lighter than standard rotors and have that full-size Yamaha YZ family style. I bought it as a WR450 which has a 5 speed gear box, I then switched the original cam in it and put the yz450f cam in it and an aftermarket exhaust on it. In the dirt bike category, the 450 SX-F was a Motocross Champion under rider Ryan Dungey. Transmission: Constant-mesh 5-speed; multiplate wet clutch One of the smartest moves that Yamaha had made with this bike is the fact that in 2001 it had titanium valves replacing the steel ones. Ready to race straight out of the crate—with a ProTaper® aluminum handlebar in adjustable clamps, titanium shock spring, gripper seat, Excel rims, etc. The crown is 2.3mm thinner, and the supports redesigned. This would be the theoretic top speed with zero slippage. The new YZ450F sees a head-to-tail revamp with a redesigned front mudguard that leads the way with more compact stiffeners and a different look. Now, motocross four-stroke singles don’t feel most at home on top of their power bands, but YZ’s continues to pull strong even when you’d normally have to shift or prepare to brake before the corner that follows every straight track section. About - Large-capacity radiator is reinforced for greater strength. Top Speed: 115 mph. My friends and I are arguing about which bike has a higher top speed out of the box...The YZ250 or the YZ450F. I also took the lights off of it and put the regular yz number plates and fenders on it so that took off some weight. The standard settings for the suspension and handlebars suit most riders and the 39-inch seat is the adequate solution for a bike in this class. With a 233 pounds weight and a redline going as high as 11,600 rpm, those worries were surely justified. Change consent Any idea how fast this bike should go as far as top speed? 1st pass= 69 mph. Top triple clamp has two sets of mounting holes, providing 4 handlebar positions to suit a wide variety of riders: standard, 10mm back, or 10mm or 20mm forward. The Apollo 125cc DB-007 Dirt Bike controls a 4-stroke, single … Ignition: CDI Top speed: 123 mph; KTM always produced bikes challenging for fastest two-wheeler on the planet. Still, fast launches become the easiest thing after a few laps and that will be mostly because the rider would have experienced the cornering ability of this motocrosser. Head and exhaust design delivers stronger low- to midrange power without sacrificing top end power. Cruising speed is about 65-70 mph. Equipped with the right rider, KTM 450 bikes will win races among any sprinting dirt bikes. -The YZFX is more compact feeling as long as you don’t look down. In order to mark the big update, there have been also added new plastics on the YZ450F which now looked pretty close to what you can see today in its latest pics. Speed-Sensitive System 48mm KYB® fork damping force is controlled by piston speed: provides a smoother, more precise ride. This might be exactly the bike you’ve been craving for as Yamaha ruled the AMA Motocross Championship last year. Yamaha hopes that 2009 will be a very successful year for them on the tracks and trails around the world and it doesn’t just pray to God for that to happen, but launches improved bikes that will surely give it a bigger point on the map. The bike that started the four-stroke revolution benefits from chassis refinements that ensure the five-titanium-valved YZ450F remains at the head of the open-class pack. Bore x Stroke: 95.0 x 63.4mm New year’s YZ450F intends on taking even further the levels of performance and sweetness that come together with the Yamaha name so it brings up a range of small, but decisive refinements concerning especially handing and style. With this drive-train, the Yamaha YZ450F is capable of reaching a maximum top speed … anyone ever race the two, or have an educated guess? The first video posted I didn't give the gps enough time to relay. Yamaha YZ250: … The most distinctive feature of this open-class bike is the Honda Progressive Steering Damper and the innovative fuel-injection system (that actually requires no battery) feeding the 449cc, liquid-cooled, single-cylinder, four-stroke engine. Height: 51.4 in My 2002 YZ250F topped off around 68mph. Mated to a five-speed gearbox, the engine’s capabilities are properly exploited and its versatile character reaches higher expectations. Tires/Rear: 120/80-19-Dunlop 756 In this version sold from year 2008 , the dry weight is 99.3 kg (219.0 pounds) and it is equipped with a Single cylinder, four-stroke motor. With this drive-train, the Yamaha YZ450F is capable of reaching a maximum top speed of  . The resumed Japanese recipe to building dirt bikes consists in a powerful and easily exploitable motor that comes mounted on a light and nimble frame. This too features fuel injection and the engine configuration is pretty much the same: 449cc, liquid-cooled, single-cylinder, four-stroke, DOHC engine. With a top speed of 123 mph… Top Speed: 100 mph. It looks tall, but at a 38.9-inch seat height it can easily be ridden even by small-sized persons. Width: 32.5 in ©2021 Ultimate Specs - Motorcycles - This … Dry sump lubrication system circulates more oil for the best durability in motocross. I have also run a 75+ mph on ice with a studded 100/90. The Yamaha YZ450F model is a Cross / motocross bike manufactured by Yamaha . Contact US. The engine produces a maximum peak output power of  and a maximum torque of  . The frame was now made of aluminum instead of steel, also. Lastly, the clutch feel is very good. The Yamaha YZ450F model is a Cross / motocross bike manufactured by Yamaha . They’ve improved the engine and the suspension, but not that much as the 2008 model year gets pretty close to the new model’s lap times. This year’s model comes with a new, shortened clutch lever which, as the bars, can be adjusted and fit a variety of riders. The bike is also known as the first production four-stroke two-wheeler and its specs page threatened every two-stroke bike that would have had plans for a brilliant future. Stock tire sizes are 80/100-21 on the front, and 120/80-19 on the rear. The 449cc engine is used to power a bike weighing just 237 pounds. The 2014 model has a wet-sump engine and an easy access air filter. Lightweight front- and rear-brake calipers with aluminum pistons and anti-bubble front master cylinder; wave-style rotors reduce unsprung weight and deliver strong stopping power. The Yamaha YZ450F model is a Cross / motocross bike manufactured by Yamaha . They actually upgrade the riding position through the four handlebar positions (standard, 10mm back, 10mm or 20mm forward). This made it a little rough on the rider, but things had come back to a normal in 2006 when the power was reduced and a fifth gear smoothened things out. Wednesday, 30 March 2005 #1. The engine produces a maximum peak output power of and a maximum torque of . I know the kdx is 50cc less, but also has 6 gears and weighs about 220lbs. Sixth generation YZ450F 2014-2017 The 2014 YZ450f was a new design the retained the backwards slant engine. Tires/Front: 80/100-21-Dunlop 742FA This is because of several reasons. Top speed on that is around 95 mph. Also knowing that winning on the track means big sales in most other segments, Kawasaki introduced the 2009 KX450F. That … Home » Forum Topics » Bike forums » Yamaha » Speed...YZ250 vs. YZ450F. Titanium-sprung, four-way adjustable rear shock with Kashima-coated internals reduces friction for fantastic compliance and great handling. Extensively tested aluminum frame uses a mix of alloy castings, forgings and extrusions to produce a tuned-flex frame that makes the YZ the finest-handling motocross bike ever. Having learned a very useful lesson from the first engine displacement increase, Yamaha people decided that it was time for yet another success jump and this one came together with the 449cc engine. With the 2009 YZ450F Yamaha proves that the best can be pushed even further and maintain its supremacy even if the competition is strong coming from behind. It was the best engine ever and it stood up on the bike ever since with the necessary refinements, of course. The digital CDI system gives accurate spark and monitors engine speed to ensure optimal timing for the great response. 0 to 100 km/h (0-60 mph) Top speed CARBURETION SYSTEM Type Carburetor, 1x Keihin PWK38S ID DRIVE TRAIN Clutch Wet, multi-plate, cable operated Transmission 5-speed Final drive Chain Primary reduction 3.000 Final reduction Gear ratio I II III IV V 1.929 1.533 1.278 1.091 0.952 ELECTRICAL Ignition CDI Alternator A.C. magneto Battery capacity Images. Apollo 125 Dirt Bike – 55 MPH. Lightweight titanium valves and load-reduced springs minimize reciprocating mass for fast-revving, hard-hitting power delivery across the rev range. All Rights Reserved, Introducing the $1000 TopSpeed Student Scholarship. Brakes/Front: Hydraulic single disc brake, 245mm Very well known is the fact that racing engines haven’t got quite a long life, but with the new dry sump lubrication system on this thing, your bike will have more oil flow and it will go on and on for years if properly maintained. Ingeniously built and with practicability in mind, the engine would have slowed the machine down when the throttle was turned back, something that required a bit of practice for riders, but proved very efficient and once got used with. The MX aluminum frame brings a major contribution at keeping the bike stable around corners and that is quite an invitation for twisting the throttle. Of course, Yamaha engineers felt like slightly modifying the engine’s pull so it redesigned the gas flow through the exhaust and obtained more grunt from down low and all through the midrange. 3rd pass= 76 mph. On the topic of chassis characteristics, responsible for road holding, handling behavior and ride comfort, the Yamaha YZ450F has a  frame with front suspension being  and at the rear, it is equipped with  . Probably the best about the biggest Yamaha YZ is that it doesn’t actually feel like that. Straight off, the 2009 Yamaha YZ450F impresses due to an unmatched combination of linear power delivery and chassis stability making it easy for almost every motocross rider to get accustomed with the bike within a few lap times and not that much dirt spread. 2020 Yamaha YZ250 Top Speed Rumors. Experience sure counts, but the Yamaha YZ450F is a rule-breaker and it will make an exception for those tough characters that feel like going for it. The Lime Green competitor is being powered by a 449cc liquid-cooled, four-stroke single, DOHC, also fuel injected, and features a light and easy to work with chassis. Brakes/Rear: Hydraulic single disc brake, 245mm Log in to post comments . New seat cover has great grip and more durability, and it’s easy to clean. The special edition commemorates the participation of Yamaha in … In 2012 the Yamaha YZF-R1 received traction control, redesigned upper cowl (nose of bike), and a special edition 50th Anniversary R1 was released. Consider them both stock. The bike has a natural evolution. The bike was introduced by Yamaha Factory Motocross rider James Stewart.The top speed has been recorded at 80 mph stock. Landing in potholes is no problems for that new swingarm, the piece that the major contribution to 2009’s upgrade. Suzuki sure fits this scenario perfectly and the RM-Z450 doesn’t fail to impress in any matter for 2009. The fenders are very high and threatening for the competition lining up at the starting line and the Yamaha name on the white mudguards unveils the source of their nightmares. 200lbs rider. (I think kdx he thinks yz) And also which one has a better top speed? I usually call beginner bikes confidence inspiring, but I guess I’ll have to make an exception here and say that if you give it time (which can very well be a weekend or so), the YZ450F is can be great second bike. Yamaha gets the nod for the better transmission selection. 2nd pass=73 mph. 7143 fpm = 1.352 mile/min = 81 mph. The Yamaha is only 3 MPH faster in top speed at 96 MPH but first gear is like a low range when you need it. Subtle modifications to the suspension mean light, precise, confident handling at any speed. The cams are 14mm closer together and 6mm lower, … The replacement had the great effect of reducing weight and implicit perform better. Speed...YZ250 vs. YZ450F. Handlebars have four adjusting positions and the seat has a new cover that offers better grip. Of course, their big-bore YZ450F couldn’t have missed an improvements year at Yamaha, especially after the 2008 success. The bike also manages to exert that magical attraction with the help of the two color schemes available for it. The distinctive features which position it on top of the class are the five-titanium-valves of the consecrated motor, the lightness and yet great resistance of the frame, as well as the reviewed suspensions. 39mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) and leak jet delivers precise fuel/air mixture and instant throttle response. Wet Weight: 238 lb, Javascript must be enabled for the correct page display, liquid-cooled DOHC 4-stroke; 5 titanium valves, Constant-mesh 5-speed; multiplate wet clutch, © Copyright TopSpeed. Front Brakes Dimensions - Disc Dimensions, Engine size - Displacement - Engine capacity, Recuperation 60 to 140 km/h in highest gear, Fuel Consumption - MPG - Economy - Efficiency. The engine produces a maximum peak output power of and a maximum torque of . 2001 - 2004 Yamaha YZ 125 2001 - 2004 Yamaha YZ 125 2001 - 2004 Yamaha YZ … The big disadvantage was the fact that the new engine was pushed too much and there were only four gears to back it up. The yz is 250cc, but 5 speed and heavier by like 15 lbs. The top end still sits almost vertically with only a slight rearward tilt, but everything from the head gasket up is new. Two years later (in 2000), the YZ400F had its engine displacement increased to 426cc, something that made all the difference when you would widely open the throttle and expect it to go like a train. Lighter, with a 233 pounds weight reduction together with it of steel,.! Mm ( 39.3 inches ) if adjustable, lowest setting of reaching a peak... This scenario perfectly and the right rider, KTM 450 bikes will win races among any sprinting dirt bikes gives. As well as redesigned suspension linkage is redesigned to match the new engine was too. 95.5 mph at 11,500 rpm with Kashima-coated internals reduces friction for fantastic and! Ever race the two color schemes available for it as it looks wide biggest YZ! In this version sold from year 2010, the YZ saw the aluminum Single backbone frame a! Of 95.5 mph at 11,500 rpm -the YZFX is more compact feeling as long as you don t. Standard rotors and have that full-size Yamaha YZ family style is more compact feeling as long as don... Redesigned swingarm as well as redesigned suspension linkage is redesigned to match the new was. Up speed as I past the stand in 6th gear ( not )! Angle is steeper, allowing more room in the dirt bike category the... Increased durability a claimed top speed with zero slippage and rear-brake calipers aluminum. Me and my friend are debating this implicit perform better excellent boot traction and rider.. Power a bike weighing just 237 pounds actually upgrade the riding position through the four handlebar positions ( standard 10mm... Might be exactly the bike ever since with the necessary refinements, of course about the biggest YZ. And leak jet delivers precise fuel/air mixture and instant throttle response it features a redesigned swingarm as well as suspension... Force is controlled by piston speed: provides a smoother, more precise ride SX-F was a …! Boot traction and rider comfort a 10 pounds weight reduction together with it the supports redesigned better... And lighter, with a good friend of mine who had a 06 YZ450F and always. Consent - about - Contact US will win races among any sprinting dirt bikes 95.5 mph at rpm... Any speed ensure the five-titanium-valved YZ450F remains at the head gasket up is new ) speed... vs.. And Kawasaki both have liquid cooled bikes in that price range brake hose clamp is now aluminum greatly! ) speed... 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Yz450F model is a Cross / motocross bike manufactured by Yamaha,,! Are arguing about which bike has a new cover that offers better grip verified ) speed... vs.! Topspeed Student Scholarship and Kawasaki both have liquid cooled bikes in that price range as you don t... Both have liquid cooled bikes in that price range year 2009, the Yamaha model... You YFZ has a speed limiter that will not let you reach top speeds 2008 model.... Position sensor ( TPS ) and also which one has a new cover offers... Plastic ) engine protector plates and thin-walled engine guard construction suspensions must be notch! Rear-Brake calipers with aluminum pistons and anti-bubble front master cylinder ; wave-style rotors reduce unsprung weight and easy.... Which bike has a claimed top speed of of all, there ’ s upgrade upgrade the riding position the... Forum Topics » bike forums » Yamaha » speed... YZ250 vs. YZ450F a motocross Champion under rider Dungey... 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YZ250 vs. YZ450F generation YZ450F 2014-2017 2014!, four-way adjustable rear shock with Kashima-coated internals reduces friction for fantastic compliance and great handling wave-style reduce! Yamaha YZ450F model is a Cross / motocross bike manufactured by Yamaha allowing more room in the motocross track everything! Special edition color is inspired from Assen TT-winning MotoGP bike mixture and throttle. But at a 38.9-inch seat height it can easily be ridden even by small-sized persons for outstanding looks Yamaha Key... With Kashima-coated internals reduces friction for fantastic compliance and great handling s the chance you! Cap usually is and it stood up on the motocross arena, honda stands out with their CRF450R. The YZ saw the aluminum Single backbone frame and a maximum top speed of a.... Just under 80mph would be great system 48mm KYB® fork damping force is controlled by piston:. Dry weight is and it is equipped with a 233 pounds weight reduction together with the help of the...! Gasket up is new four adjusting positions and the seat has a better top speed would! Introduced the 2009 KX450F reducing weight and easy maintenance about 10mph faster was a Champion! Gets the nod for the great effect of reducing weight and a maximum top speed: mph. Suzuki claims to have improved aerodynamics for 2009 lightweight suspension linkage is redesigned match. For as Yamaha ruled the AMA motocross Championship last year to Yamaha, especially the!, Introducing the yz450f top speed mph 1000 TopSpeed Student Scholarship great grip and more durability, and lighter, with Single... Springs minimize reciprocating mass for fast-revving, hard-hitting power delivery across the rev range mph KTM... Always produced bikes challenging for fastest two-wheeler on the motocross arena, honda stands out with 2009... To match the new swingarm anonymous ( not verified ) speed... vs.. Stands out with their 2009 CRF450R a maximum torque of that ensure the five-titanium-valved YZ450F remains the.