FEATURES & BENEFITS
New for 2004:
- All-new, lightweight 48mm inverted Kayaba cartridge fork features 11.8 in. of travel with compression and rebound damping adjustability. Special coating on fork reduces stiction while giving “factory” appearance.
- Lightweight front and rear calipers with aluminum pistons and revised front master cylinder combined with 250mm fully floating front and 245mm rear disc deliver strong stopping power with progressive control and feel.
- All-new, upper triple clamps feature an anodized finish for “factory” look.
- All-new, “gripper-style” seat cover offers excellent feel and control.
- All-new, wide, cleated, folding titanium footpegs are lightweight and provide excellent comfort, grip and ground clearance.
- Recalibrated front fork settings deliver smoother, more compliant overall stroke.
- Frame gusset is redesigned to save weight yet remain incredibly strong.
- Cylinder body and crankcase feature a larger cut-away section to reduce pumping loss and increase mid-range performance.
- All-new lightweight titanium header pipe (with titanium heat shield) flows to a repackable aluminum silencer for maximum power.
Engine:
- Liquid-cooled, 249cc, 5-valve, DOHC, 4-stroke is the world’s most powerful, quarter-liter 4-stroke motocrosser. The stratospherically high 13,500-rpm redline means incomparable, competition-crushing pulling power.
- Primary kickstarting (with automatic decompression and convenient handlebar-mounted hot start lever) ensures easy restarts.
- Titanium valves and load-reduced springs decrease weight by more than 40% and reduce reciprocating mass for faster-revving, harder-hitting power delivery across the rev range.
- Lightweight forged piston reduces reciprocal mass and friction for faster revving and greater durability.
- Slick-shifting, 5-speed transmission with heavy-duty, multi-plate clutch features an involute spline set-up, ensuring smoother shifting and instant hook-up under power.
- 37mm Keihin FCR flat-slide carburetor with throttle position sensor (TPS) ensures ultra-precise fuel/air mixing and lightning-quick throttle response.
- Digital CD ignition system delivers more precise spark and monitors engine speed to ensure optimal timing for faster, stronger response during hard acceleration.
- Large-capacity radiator provides outstanding cooling efficiency.
- Lightweight exhaust system with specially shaped header angle maximizes engine power and allows hassle-free replacement of oil filter.
- Dry sump lubrication system uses frame as oil tank, helping to create a more compact engine and chassis for superb handling performance.
- Magnesium cylinder head cover helps shave weight.
- Trick, works-style clutch lever features race-spec barrel adjuster for on-the-fly adjustability.
Chassis/Suspension:
- Removable aluminum rear subframe constructed of square-section pipe for light weight and easy maintenance.
- Tapered swingarm is light and rigid for compliant rear suspension action.
- Lightweight 48mm inverted Kayaba cartridge fork features 11.8 in. of travel with compression and rebound adjustability.
- Low-friction outer tubes and aluminum piston rods ensure smooth, compliant fork stroke for superior handling and light steering.
- More weight reduction via two-piece (part aluminum, part plastic) engine protector plates and thinner-walled engine guard construction.
- Super-strong frame is lightweight and laterally rigid for minimal flex and razor-sharp handling.
- Rear suspension system features fully adjustable Kayaba shock with 12.4 in. of travel and separate adjusters for high- and low-speed compression damping.
- Lightweight 21 in. front and 19 in. rear rims provide exceptional durability and help reduce unsprung weight for optimal suspension performance.
- Premium Dunlop 739 knobbies offer unbeatable, competition-spec traction and excellent wear.
Additional Features:
- Cleated rear brake lever and folding shift lever tip offer superb grip and excellent durability.
- Durable, comfortable handlebar grips.
- Stainless steel clutch cable for longer life.
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