Full 2013 KX250f Specs
At a glance…
• Upgraded Showa Separate Function Fork (SFF) provides more progressive damping force and features larger-diameter 48mm inner fork tubes for improved rigidity and less stiction
• Dual injector Digital Fuel Injection system
• More robust high-rpm engine output extends deep into the overrev
• Stronger engine components improve reliability
High-Revving, High Performance Engine
• 249cc, liquid-cooled, four-stroke, four-valve, single-cylinder DOHC engine delivers hard-hitting power across the rpm range
• Nickel plating on the cylinder wall has a high adhesion factor for optimum durability
• Thick-stem connecting rod resists flex and enhances durability
• Thick crank web design features a balance factor on par with the factory racers to help minimize engine vibration, provide smooth power delivery and maximize performance in the mid-high rpm range
Digital Fuel Injection (DFI) System
• Revised intake tract provides a straighter shot into the combustion chamber for more direct airflow from the airbox into the combustion chamber
• Seal between air inlet port and throttle position sensor unit on the 43mm throttle body protects TPS sensor from fuel penetration
• Progressive throttle linkage opens more quickly after 3/8 open position
• Simple and efficient system: No battery, fuses or relays
• Sharp and precise engine response across entire rpm range
• Offers easy engine starting
• Helps prevent engine hesitation after landing from jumps and other high-impact situations
Bridged Box-Bottom Piston
• Revised piston profile helps increase reliability
• Light and strong piston shares same design as the factory racers, and a tin plating to optimize its interface with the nickel plating on the cylinder wall
• Special finish improves surface lubrication and wear resistance
• Short piston pin reduces reciprocating weight
Lightweight and Efficient Top End
• Stronger intake valve seat material offers increased durability
• Ultra-light valves have extremely thin valve stems on par with those found in supersport machines; intake valves feature thick heads for increased strength
• Special casting method leaves the intake port surfaces extremely smooth for optimum intake efficiency across the rev range
• Silicon-coated head gasket provides excellent sealing
Stainless Steel Exhaust System
• New 30mm shorter head pipe improves performance with a resonator chamber to help boost low-rpm torque
• New high-volume muffler assembly is 30mm shorter with a larger cross section keeps noise levels at 94 dB while retaining power production
• Durable stainless steel construction
Efficient Cooling System
• Thick radiators are strong and offer excellent resistance to mud buildup while providing superb cooling performance
• Cylinder head water jacket routes coolant to the front of the cylinder head for even cooling
Transmission and Shifting
• Strong, beefy crankcases feature additional material around the engine mounts to help increase long-term durability
• Clutch cable holder is integrated with the crankcase for accurate feel at the clutch lever
• Scavenge oil filter screen can be accessed without splitting the crankcases, facilitating easier maintenance
Quick-turning Chassis
• The KX250F’s slim and lightweight aluminum perimeter frame is 4mm narrower for improved ergonomics and handling
• Center of gravity and key dimensions such as swingarm pivot, output sprocket and rear axle locations designed to increase forward drive with minimal rear-end squat
Upgraded SFF Fork
• Upgraded 48mm Separate Function Fork (SFF) features new 1mm larger inner fork tubes which allow the internal damping components to be larger, for firmer damping response and increased ride comfort
• SFF design separates springing and damping functions for less weight, better performance, less stiction and easier adjustability
• Super-hard titanium coating on the outer surface of the inner fork tubes reduces stiction and improves suspension action while also helping prevent scratches and tube damage
• Friction-reducing Kashima Coat treatment on the inside of the outer fork tubes contributes to smoother suspension action
• Wrap-around fork tube guards provide excellent protection for the inner tubes
• Revised lower triple clamp open at the back for increased rigidity and improved fork action
Uni-Trak® rear suspension
• Rear shock features dual compression adjustability, allowing high-speed and low-speed damping to be tuned separately
• Features Kashima Coat on the inside cylinder wall for reduced friction and smoother suspension action
• New swingarm uses a longer cast front section, tapered hydroformed spars and forged chain adjusters
• Uni-Trak® rear suspension linkage system mounts the suspension arm below the swingarm, allowing more rear suspension stroke and precise tuning
• Linkage ratios for the Uni-Trak rear suspension match rear shock damping settings to achieve maximum rear wheel traction
Rider Interface
• Bodywork components offer the rider a slim interface, making it easy for racers to feel comfortable and go fast
• Formed using a double-injection molding process, the shrouds offer a slim design
• New smaller side number plates also contribute to the slim package
• Right side panel has an added passageway to help cool the silencer
• Flatter design of the seat and tank offer greater freedom of movement
• Frame is wider at the ankles to offer better grip and narrows near the bend below the seat to allow a slim riding position
• Slim seat features upgraded polyurethane, designed for greater durability
• Seat has a slip-resistant top and side surface for good grip when seated and while standing
• 50mm wide (front-to-rear) footpegs offer superb grip and feel at the pegs
• Clutch cable boot features a large quick adjuster, making it easy for riders to adjust play in the clutch cable while on the fly
• Throttle grip has a one-piece collar that provides additional stability during throttle operation
• Longer hand grips allow the rider to hold the bars closer to the centerline and are made of lower density material for improved rider comfort
Factory-style Components
• New pushrod type front brake master cylinder and new brake pad material provide stronger brake force and enhanced feel
• New rear brake pad material offers powerful braking performance
• Lightweight black anodized rims, are durable and look just like the factory racers
• Titanium coated inner fork tubes minimize stiction and look great
• Front and rear petal brake discs help reduce unsprung weight, and the wave shape helps clean the brake pads for more efficient stopping performance
• Rear caliper guard protects caliper from damage
• Ribless rear hub and butted spokes further reduce unsprung weight
• Renthal aluminum handlebar is standard equipment
• Blue ignition cover plugs and oil filler cap match the blue accents on the factory race bikes
• Factory-style graphics complement the KX250F’s highly tuned performance
Additional Features
• New radiator shrouds and side panels provider a slimmer rider interface and a more nimble feel
• New front fender
• Redesigned front number plate
• New embossed design on clutch cover
• New higher-density chain pad on top of the swingarm is more resistant to wear
• Large resin skid plate offers great protection with minimum weight
Optional Accessories
• Optional DFI Calibration Kit allows custom tuning
• Optional FI Indicator Light allows the DFI system to communicate diagnostic information
• Optional engine parts include magneto rotors with different inertias and a 12-tooth output sprocket
• Optional chassis parts include handlebar holder for a 1 1/8-inch handlebar, 46 to 50-tooth aluminum and steel rear sprockets, solid petal brake rotors, different fork and shock springs and manual decompression lever and cable
Specifications
Engine - Liquid-cooled, four-stroke single with DOHC and four-valve cylinder head
Displacement - 249cc
Bore x stroke - 77.0 x 53.6mm
Fuel injection - DFI® with 43mm Keihin throttle body and dual injectors
Compression ratio - 13.8:1
Ignition - Digital DC-CDI
Transmission - Five-speed with wet multi-disc manual clutch
Final drive - Chain
Frame - Aluminum perimeter
Rake / trail - 28.7 degrees / 5.0 in.
Front suspension / wheel travel - 48mm inverted Showa SFF telescopic fork with 40-way spring preload adjustability and 22 position compression and 20 position rebound damping adjustability/ 12.4 in.
Rear suspension / wheel travel - Uni-Trak® linkage system and Showa shock with 9 position low-speed and stepless high-speed compression damping, 22 position rebound damping and fully adjustable spring preload / 12.2 in.
Front tire size - 80/100-21
Rear tire size - 100/90-19
Front brake - Single semi-floating 250mm petal disc with dual piston caliper
Rear brake - Single 240mm petal disc with single-piston caliper
Overall length - 85.4 in.
Overall width - 32.3 in.
Overall height - 50.0 in.
Wheelbase - 58.1 in.
Ground clearance - 13.0 in.
Seat height - 37.2 in.
Curb weight - 233.6 lbs.
Fuel capacity - 1.61 gal.
Color - Lime Green
looks just like the 2006, 2007, 2008, 2009, 2010, 2011 and the 2012 to me 
maybe they should change the colors to black and green instead of green and black I might see some differences 
Silly James, dirt bikes don't have hoods. Quads do.
