2019 YZ450F

$10,599

After a laundry list of significant upgrades in 2018, the YZ450F gets refined for 2019 with optimized suspension settings to further enhance its on-track capability. With highlights including the wireless Power Tuner app, electric start, launch control, a potent fuel-injected four-stroke engine and a race-ready chassis, the ultimate motocrosser is ready to take you straight from the showroom floor to the podium.

Dealer #: 6249


INQUIRY ABOUT PRODUCT

NEW FOR 2019

  • Optimized suspension settings

Key Features

  • Wireless smartphone-based Power Tuner app
  • Revolutionary reversed engine design with front-mounted FI system and rear-exiting exhaust
  • Mass centralizing rearward-slanted cylinder helps keeps weight centred in the chassis
  • Electric starting and lithium ion battery
  • Launch Control System
  • Compact aluminum Bilateral Beam frame and aluminum swingarm
  • Industry-leading, race-ready, fully adjustable suspension

ENGINE

  • Reversed, liquid-cooled, 449 cc, DOHC, 4-valve (titanium), fuel injected, single-cylinder engine.
  • Electric starting.
    • super convenient electric starting means faster re-starts and significantly reduced rider fatigue
    • compact electric starter powered by a lightweight lithium ion battery
  • “Reversed” engine design (FI system is front mounted, exhaust exits from rear of cylinder).
    • FI throttle body and air box are front mounted, providing a straight intake path
    • straight shot intake path provides optimum fuel / air / exhaust flow for excellent power
    • front mounted intake keeps fuel cooler since engine heat has less effect on incoming fuel (cooler fuel is more dense and increases power)
  • Rearward slanted, reversed cylinder design centralizes mass.
    • rearward slant has been revised
    • rearward slant moves a significant amount of rotating weight toward the centre of the chassis, centralizing mass for light, agile handling
  • Revised, 4-valve cylinder head features a new 12.8:1 compression ratio.
    • compact combustion chamber provides optimum combustion speed while also reducing heat and power losses
    • 37 mm titanium intake valves and 30.5 mm titanium exhaust valves
    • 4-valve design offers optimum flow for excellent power and torque
  • New long design electrode spark plug.
    • moves the spark plug tip deeper into the combustion chamber
    • new spark plug cap holder(helps prevent plug cap from being dislodged)
  • High-lift intake and exhaust cams and valve springs.
    • intake and exhaust cam profiles and cam timing optimized for increased power output
    • valve spring size and rates have been revised to match the revised cams
    • valve spring rates are optimized to reduce friction related power losses
  • Lightweight titanium valves.
    • titanium valves reduce weight and improve performance… titanium valves are 40-45 % lighter than steel valves
    • reduced valve weight improves valve train reliability and longevity
    • reduced reciprocating weight allows for a higher rpm limit and better control of the valves
  • Automatic cam chain tensioner.
    • reduces maintenance and mechanical engine noise
    • special cam chain “sliders” reduce internal frictional losses
  • Lightweight, ceramic composite-plated “liner-less” aluminum cylinder.
    • reduced weight (no sleeve or heavy liner) plating is sprayed directly on the aluminum block
    • ceramic coating ensures faster, more uniform heat dissipation
    • ceramic coating enhances the thin film of oil between the cylinder and piston, reducing friction and increasing power
  • Cylinder is “offset” relative to the crankshaft (to exhaust side).
    • reduces frictional losses between piston and cylinder wall during the power stroke
  • Cylinder “cutaways” allow air “trapped” under the piston to enter a side chamber (or cutaway).
    • reduces horsepower-robbing “pumping losses”
  • Crankcase also utilizes special “cutaways”.
    • reduces horsepower-robbing “pumping losses”
    • crankcase cutaways match cylinder cutaways for maximum efficiency
  • Lightweight, short-skirt, forged aluminum piston and piston pin.
    • new piston design increases the compression ratio from 12.5:1 to 12.8:1
    • piston weight is reduced by 6 grams and features new under side ribs for additional strength
    • lightweight design means faster throttle response and reduced mechanical vibration for excellent durability
    • DLC (diamond-like coating) coating on piston pin and special coating on piston skirt reduces frictional losses
  • Piston oil cooler jet nozzle directs oil to the cylinder, rod and underside of piston.
    • reduces piston, cylinder and rod temperatures for excellent durability
  • Carburized connecting rod for excellent durability.
    • carburization is a type of heat treating that adds strength and hardness
  • Lightweight gear-driven balancer shaft.
    • reduces vibration for improved rider comfort and reduced rider fatigue
  • Heavy-duty clutch with quick-access magnesium outer cover and on-the-fly barrel adjuster.
    • quick-access outer cover provides fast and easy clutch access
    • light lever pull for reduced hand fatigue during a long moto
    • works-style, race-spec barrel adjuster for on-the-fly clutch lever free play adjustments.
  • Revised, heavy duty clutch with quick access magnesium outer cover and on the fly “barrel adjuster.”
    • revised pressure plate features new reinforcing ribs for improved clutch feeling
    • revised clutch springs and specially machined steel plates
    • quick access outer cover provides fast and easy clutch access
    • light lever pull for reduced hand fatigue during a long moto
    • works-style race-spec “barrel adjuster” for on-the-fly clutch lever free play adjustments.
  • 5-speed transmission with 2-bar, floating shift guide system and a 14 mm shift shaft.
    • 2nd, 3rd and 4th gears are wider to engine power
    • floating shift guide system provides smooth, positive shifts
    • 14 mm shift shaft provides good durability in the event of a crash
  • Lightweight, 44 mm Mikuni throttle body fuel injection system.
    • 12-hole injector maximizes fuel atomization for more complete combustion and excellent power delivery
    • FI benefits include automatic adjustments to insure the optimum fuel andmdash; air ratio regardless of outside air temperature and altitude
    • other benefits include excellent throttle response and starting
    • cold start knob (FID) also doubles as an idle adjuster
  • Smartphone-based, wire-less, “Power Tuner” app.
    • super convenient, smartphone based Power Tuner
    • no “hard” link required between the unit and smartphone… wireless signal via Wi-Fi
    • app is free and will work with either iOS or Android platforms
    • receiving communication control unit (CCU) is located under left side cover of bike
    • adjustment range includes 16 settings for both fuel injection duration and ignition timing
    • real-time machine monitoring function (engine rpm, throttle angle, battery voltage, coolant temp, intake air temp, outside air pressure, etc.)
    • new maintenance function allows user to track hours of use for scheduled maintenance
    • race log function is available to record and save settings from various tracks
    • tuning maps and race logs can be shared
  • Forward-mounted air box with revised washable, dual-stage foam air filter.
    • no tools required to access air filter
    • new air box cover with single quick-release fastener
    • revised, washable dual-stage air filter
  • Wet sump lubrication system.
    • reduces weight (no remote oil tank or oil lines)
    • eases maintenance (easier and faster oil changes)
    • oil volume is optimized to reduce oil related drag and weight
  • Easy-access “cartridge-type” oil filter for fast, easy oil changes.
    • single-core, dual radiators provide outstanding cooling efficiency
  • Maintenance-free transistor controlled ignition (TCI).
    • produces a strong spark for fast starts
    • provides precise ignition timing / mapping for optimum engine performance at any rpms
  • Lightweight, wrap-around exhaust system.
    • exhaust exits from the rear of the cylinder and circles cylinder body
    • header length optimized for “pulse effect” for excellent power delivery
    • centralizes mass by moving weight closer to the centre of the chassis
  • Lightweight, aluminum, re-packable muffler (aka silencer).
    • sound output is 94 dB meeting CMRC and AMA regulations
    • new rubber muffler-mounting system reduces vibration and improves durability
  • Launch Control System (LCS).
    • provides smoother, quicker starts with less wheel spin and front wheel lift
    • allows rider to concentrate on clutch control, body position and machine
    • system functions in 1st and 2nd gears only and is disabled when the bike is shifted into 3rd
    • ECU controls the system and adjusts engine rpm to limit wheel spin and wheelies
    • activation button is on the LHS handlebar and features a LED indicator light.
  • Special “G” sensor system.
    • shuts down fuel injection system if bike lies on its side for more than 10 seconds
    • helps prevent costly engine damage
    • no special procedure to re-start the bike… just hit the electric start button and go!

    CHASSIS/SUSPENSION

    • Compact, lightweight bilateral-beam aluminum frame.
      • new frame offers an optimum rigidity balance between strength, rigidity and tuned flex, while also providing excellent shock absorbing qualities
      • large upper frame bracing provides rigidity and durability
      • rear frame spars and tuned engine mounts centralize mass for balance of bump absorption, stiffness and rider feeling
    • Lightweight, tapered aluminum swingarm.
      • lightweight design reduces unsprung weight for optimum suspension performance
      • excellent rear wheel traction and control
      • 25 mm rear axle
    • Lightweight, detachable rear sub frame.
      • constructed of square-section, lightweight aluminum pipe with no bends
      • allows easier access when servicing rear suspension components
      • detachable design reduces costs in the event of a loop out

      Lightweight, high-strength, tapered aluminum handlebar.

      • adjustable handlebar holders offer a total of 4 different handlebar positions with an adjustment range of 30 mm (1.2 in) suits a wide variety of rider sizes
        • handle bar holders are rubber-mounted for reduced vibration and improved rider comfort
      • 48 mm, adjustable, inverted, KYB “SSS” coil spring-type fork with 310 mm (12.2 in) of wheel travel.
        • speed-sensitive damping provides exceptional balance between handling and bump absorption
        • friction-reducing coating on inner tubes
        • compression and rebound damping adjustability
        • optional fork springs are available through GYPA
        • helps prevent aerated fork oil from entering the inner damper assembly and degrading its damping abilities
        • the inner damper is pressurized, eliminating bubbles forming in the oil
        • 22 mm front axle
        • Transfer Control Valve (TCV) offers more precise control throughout the full suspension stroke
        • TCV is located on the upside of the spring and its function is controlled by piston speed, not piston position, hence the term “Speed Sensitive System fork.”
      • Large wrap-around plastic fork protectors provide excellent lower fork tube protection.
        • self-supporting design reduces friction for smoother fork operation
      • KYB linkage-type rear suspension with 317 mm (12.5 in) of wheel travel.
        • damping characteristics specially tuned for YZ450F chassis
        • separate adjusters for high- and low-speed compression damping
        • shock is in-line with the centre axis of the frame for excellent control
        • adjustability includes spring preload, low and high speed compression damping, and rebound damping
      • 270 mm floating front “wave-style” disc and compact Nissin twin piston caliper.
        • wave disc design reduces weight and improves cooling (wave design offer more surface area for better cooling)
        • aggressive brake pad material offers excellent braking performance
        • “shorty-style” adjustable front brake lever can be adjusted to fit various hand sizes
      • 245 mm rear disc brake features a “wave-style” disc and single piston Nissin caliper.
        • heat-resistant rear rotor enhances brake durability
        • rear caliper and lower portion of the disc are protected by heavy duty plastic protectors.
      • 6.2-litre lightweight plastic resin fuel tank
        • tank specifically designed for motocross demands
        • tank is positioned under the seat to reduce centre of gravity and centralize mass for exceptional handling and a lightweight feeling
        • compact in-tank electric fuel pump

      • Compact body work with embedded graphics
        • Narrow bodywork design optimizes rider mobility and enhances the lightweight feel and look of the YZ450F
        • flat design, “minimal” bodywork allows for fast, easy rider movements and a natural riding position
        • minimal design aids in keeping the body work looking good longer (less plastic to scratch or damage)
        • graphics are impregnated directly into the plastic rad shrouds and will not peel off or get damaged by pressure washing
      • Flat design seat.
        • seat is narrow in the fuel tank for ideal knee grip and easy rider movements
        • front of seat features a quick remove “cap cover” to access the fuel cap

      • Lightweight D.I.D. front and rear rims.
        • stylish blue colour emanates light design reduces unsprung weight for optimal suspension performance and handling
        • excellent strength and durability due to new cross sectional rim design
        • rear hub features second bearing on sprocket side for increased rigidity and durability
      • Lithium ion battery.
        • lightweight, compact battery and under-seat, lightweight composite battery box
        • special battery management system (BMS) with “self-protection” mode both monitors and maintains battery condition
      • YDT (Yamaha Diagnostic Tool) easy access, under seat coupler.
        • easy access for Yamaha’s exclusive money- and time-saving diagnostic tool

      DETAILS

      • Lightweight 520 drive chain
      • Quick-adjust clutch perch
      • Extra wide 55 mm foot pegs provide excellent grip
      • Convenient oil level sight glass
      • Folding shift lever tip helps prevent damage
      • Lightweight Sun Star rear sprocket
      • Heavy duty rubber swingarm protector
      • Lightweight chain guide / support helps reduce chance of chain derailment and helps protect rear sprocket
      • Clutch cable features integrated silicone grease and Teflon liner for smooth cable operation

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