Page 2 - Course Title; WR450F Development Themes; Good cornering & suspension performance = racing success; Here’s why...
Course Title The development / concept theme for the latest generation WR450F is : • Improved horsepower , torque and engine response (FI system) • Ease of handling on tight trails (Bilateral Beam frame) • Improved function for rough trail and competition use (YZ “SSS” 48mm inverted fork) • New more...
Page 3 - WR450F background – key items
Course Title Engine: 2012 engine is based on existing 5TJ power plant … 5-valve design • Addition of fuel injection • Numerous other changes • Excellent reputation for durability & reliability Chassis: • New YZ250F based “Bilateral Beam” frame • New YZ based suspension • KYB 48mm adjustable, inv...
Page 4 - - Valve Cylinder Head
Course Title Click the Next button to continue. WR450F 5-valve cylinder head benefits: 1. Excellent “breathing” efficiency (increased valve area improves intake & exhaust flow) 2. Allows a higher rpm limit because smaller, lighter valves have less risk of valve float (valve float is one of the d...
Page 5 - Crankshaft & balancer shaft; Balancer weights
Course Title Click the Next button to continue. WR450F Crankshaft & balancer shaft Crankshaft benefits: 1. Excellent durability & reliability. This is a proven engine design 2. Reduced vibration (especially in the handlebars) The WR450F utilizes a roller bearing style crankshaft with an engi...
Page 6 - -speed wide ratio transmission; st; gear; nd; gear; rd; gear
Course Title Click the Next button to continue. WR450F 5-speed wide ratio transmission The WR450F features a wide ratio 5-speed transmission and multi -plate wet clutch. 5- speed transmission benefits: 1. Good acceleration and top end speed 2. Excellent versatility (hare scrambles, super moto, ice r...
Page 7 - Throttle body fuel injection; altitude and temperature ... with no manual re-jetting required
Course Title Click the Next button to continue. WR450F Throttle body fuel injection Fuel injection benefits: 1. Automatically provides optimum fuel / air ratio regardless of altitude and temperature … with no manual re-jetting required 2. Improved throttle response and a more linear throttle control...
Page 8 - Cooling; The design of the rad is new and the capacity has been increased by
Course Title Click the Next button to continue. WR450F Cooling System Cooling system benefits: 1. Excellent cooling 2. Improved protection in the event of a crash The design of the rad is new and the capacity has been increased by 5%. The rads feature wider cores and improved shock resistance. Total...
Page 9 - Exhaust System; The stainless steel exhaust “header” features a resonator
Course Title Click the Next button to continue. WR450F Exhaust System Exhaust system benefits: 1. Resonator chamber improves low to mid range power 2. Spark arrestor prevents stray sparks from exiting the exhaust system 3. Light weight design reduces weight The stainless steel exhaust “header” featu...
Page 10 - TJ engine base
Course Title Click the Next button to continue. WR450F - 4 - DOHC, 5-valve (titanium) head Newly designed crankshaft Engine counterbalancer Engine counter balancer Wide ratio 5-speed transmission Electric start Keihin 42mm throttle body Enduro focused camshafts Straight shot intake & dual stage ...
Page 12 - Competition kit ECU & Power Tuner; With the installation of optional GYTR; competition use only; with the stock ECU.
Course Title Click the Next button to continue. WR450F Competition kit ECU & Power Tuner IMPORTANT WARNING: The WR450F is classified as a “restricted use motorcycle” in Canada and as a result, must conform to Environment Canada / US EPA emission standards for “restricted use motorcycles.” It is ...
Page 13 - Special Tuning Feature; No lap top or outside power source required ... plug and play; GYTR Power Tuner
Course Title Click the Next button to continue. YZ450F Special Tuning Feature FI Power Tuner benefits: 1. Allows rider or tuner to “tailor “ engine characteristics to suit track, track conditions, and rider skill level 2. Easy to connect to the machine … plug in “port” in front of fuel tank 3. Easy ...
Page 14 - mass centralization; WR450F Frame Design – part #1; – less effort to initiate a turn
Course Title Yamaha engineers identified mass centralization as one of the keys to great handling. The WR450F features a “Bilateral Beam” compact aluminum frame based on the YZ250F. Mass centralization places the mass (or weight) in the best location. On a motorcycle it is in the centre of the machi...
Page 15 - “Bilateral Beam” compact aluminum frame:; WR450F Frame design – part # 2
Course Title “Bilateral Beam” compact aluminum frame: • Frame design allows for excellent mass centralization • fuel tank sits inside the main frame rails … centralizing mass • Frame offers outstanding shock absorbing qualities • Frame consists of forged and extruded aluminum parts • Unique double S...
Page 16 - Front
Course Title Click the Next button to continue. WR450F Front suspension The 2012 model year and onwards the WR450F features Yamaha’s latest MX fork technology … the twin chamber “Speed Sensitive System” (SSS), 48mm, adjustable, inverted fork. Without getting into too much detail, the damping force i...
Page 18 - The WR450F utilizes a floating 250mm front wave style rotor; Brakes
Course Title Click the Next button to continue. YZ450F Brake benefits: 1. Excellent braking performance 2. Good lever feel and feedback to the rider 3. Wave style rotors reduce weight and dissipate heat better than a conventional round disc (more surface area) The WR450F utilizes a floating 250mm fr...
Page 19 - Instrumentation
Course Title Click the Next button to continue. WR450F Instrumentation The WR450F features a compact, lightweight instrument assembly. It features 2 different modes: 1) Basic mode : speedometer, clock, dual tripmeters, and clock 2) Race mode : timer (accumulates time from zero … counts upwards, Trip...
Page 20 - Fuel Tank
Course Title The slim design 7.2 litre plastic resin fuel tank sits down between the top frame rails and extends underneath the seat, toward the machine's center point. An electric fuel pump is located inside the tank. Click the Next button to continue. WR450F Fuel tank location - benefits: 1. Centr...
Page 21 - Less body means bike will keep looking good longer.
Course Title All new compact slim / flat design body work: • front & rear fenders • rad shrouds • fuel tank • side panels & front number plate & headlight • seat Click the Next button to continue. WR450F Benefits of new body work: 1. Fast & easy rider movements 2. Flat design a llows...
Page 22 - The “EXTRAS”
Course Title The “EXTRAS” • ProTaper handlebars • Adj. handlebars (+10mm … eccentric holders) • Extra wide footpegs • Dual stage washable air filter • Excel rims (F&R) • Tapered wheel spacers (easy wheel installation) • Skid plate • Sealed low maintenance battery • Chain guide • Premium Dunlop t...
Page 23 - Chassis key feature summary
Course Title Click the Next button to continue. WR450F Fully adj. KYB piggyback shock Skid plate 245mm wave disc / 1 piston caliper LED rear taillight Slim / minimal bodywork 48mm adj. Kayaba SSS fork 250mm wave disc / 2 piston caliper Bilateral Beam AL frame 18” rear wheel Detachable rear sub frame...
Page 24 - Thanks for listening
