2013 Kawasaki KX450F and KX250F Motocross Bikes

The 2013 KX series motocross bikes, KX450F and KX250F, finally have been revealed. What’s new on these two machines? No major change, but the KX450F which has done well for Kawasaki in 2011 and 2012 AMA Supercross and 2011 AMA Motocross Series – thanks to the rider Ryan Villopoto- gets new pneumatic fork.

The 2013 Kawasaki KX450F now comes equipped with a new 48mm Kayaba Pneumatic Spring Fork (PSF) which uses compressed air as an “air spring”. The fork is not only 1.7 pounds lighter than the previous forks, but also allows for easier tuning, reduces friction and improve bottoming resistance. It has 32mm internal damping cartridge, DLC coating on the fork tubes and removable spring pressure adjustment valve. The KX450F’s engine also receives minor updates, with revising ignition timing, piston crown and intake cam, for better low rpm response. Other features include a new front master cylinder with a knocker-style lever-to-piston connection, and a new rear brake rotor.

The 2013 Kawasaki KX250F still run the Showa Separate Function Fork (SFF), yet it also received updates. Its SFF now uses larger 48mm inner fork tubes – 1mm larger than the previous forks-, offering more progressive damping. Other features on the KX250F include a redesigned cylinder head, new swingarm that features a longer cast front section, tapered hydroformed spars and forged chain adjuster, new brake pad material, a narrower frame and new radiator shrouds.

The 2013 Kawasaki KX450F will be available for $8,699 while the 2013 Kawasaki KX250F will be offered for $7,599.

2013 Kawasaki KX450F Specifications:

Engine: Liquid-cooled, four-stroke single with DOHC and four-valve cylinder head
Displacement: 449cc
Bore x stroke: 96.0 x 62.1mm
Fuel Injection: DFI® with 43mm Keihin throttle body
Compression ratio: 12.5:1
Ignition: Digital DC-CDI
Transmission: Five-speed
Rake / trail: 26.9 degrees / 4.4 in.
Front suspension / wheel travel: 48mm inverted, Kayaba PSF with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment / 12.4 in.
Rear suspension / wheel travel: UNI-TRAK® linkage system and Kayaba shock with 50mm piston, 22-position low-speed and stepless high-speed compression dampening, 33-position rebound dampening and fully adjustable spring preload / 12.4 in.
Front tire: 80/100-21
Rear tire: 120/80-19
Front brake: Single rigid-mount 250mm petal disc with dual-piston caliper
Rear brake: Single 240mm petal disc with single-piston caliper
Overall length: 85.8 in.
Overall width: 32.3 in.
Overall height: 50.2 in.
Wheelbase: 58.3 in.
Ground clearance: 13.0 in.
Seat height: 37.6 in.
Curb weight: 248.0 lbs.
Fuel capacity: 1.64 gal.
Color: Lime Green
MSRP: $8,699

2013 Kawasaki KX250F 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 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: 80/100-21
Rear tire: 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
MSRP: $7,599

2013 Kawasaki KX 450F Commercial:

2013 Kawasaki KX 250F Commercial: