2013 Kawasaki KX Review


The 2013 Kawasaki KX line is a group of models with a hard-hitting, quick motor that works best when short-shifted all the way through. The throttle is flat and seamless, making for a smooth ride when you’re hitting jumps and buzzing your way up hills. In addition, the upgraded front forks provide a more progressive dampening and improved rigidity. There’s also a new swingarm featuring a longer cast front section, as well as tapered hydroformed spars.

An improved intake tract has straightened more than ever, creating a more direct airflow, and a revised piston profile provides better durability. A shorter stainless steel headpipe with resonator chamber adds more low-RPM kick creating a smoother ride through the redline. These bikes are durable and made for riders who want to explore their way through the tracks and canyons.

New For 2013

  • Wet multi-disc manual clutch
  • 48mm Kayaba Pneumatic Spring Fork (PSF) that replaces the main fork springs with compressed air.
  • The 32mm internal damping cartridge is much larger than last year""s, which had 24mm pistons.

2013 Kawasaki KX Specs

  • Model: KX65, KX85, KX100, KX250F, KX450F
  • Engine Type: Two-stroke single; Two-stroke single with KIPS (85 and 100); Liquid-cooled, four-stroke single (250F and 400F)
  • Bore and Stroke: 44.5 x 41.6mm; 48.5 x 45.8mm ; 52.5 x 45.8mm; 77.0 x 53.6mm; 96.0 x 62.1mm
  • Compression ratio: 8.4:1, 10.0:1 (low speed) – 9.2:1 (high speed), 9.6:1 (low speed) – 8.8:1 (high speed), 13.1:1, 12.5:1
  • Valve Train: DOHC and four-valve cylinder head (250F and 400F)
  • Induction: Four-petal reed valve; Crankcase reed valve; Two-petal reed valve; DFI with 43mm Keihin throttle body and dual injectors; DFI with 43mm Keihin throttle body
  • Ignition: Digital CDI (65, 85, 100), Digital DC-CDI
  • Transmission: Six-speed (65, 85, 100), Five-speed with wet multi-disc manual clutch, five-speed
  • Final Drive: Chain
  • Fuel Capacity: 1, 1.5, 1.5, 1.61, 1.64 gallons
  • Estimated Fuel Economy: Unavailable
  • Brakes (Front): Hydraulic disc (65, 85, 100); Single semi-floating 250mm petal disc with dual piston caliper; Single rigid-mount 250mm petal disc with dual-piston caliper.
  • Brakes (Rear): Disc (65, 85, 100); Single 240mm petal disc with single-piston caliper; Single 240mm petal disc with single-piston caliper
  • Suspension (Front): 33mm leading axle conventional fork with four-way rebound damping/8.3 inch travel; 36mm inverted telescopic cartridge fork with 18-way compression damping/10.8 inch travel (85, 100); 48mm inverted Showa SFF telescopic fork with 40-way spring preload adjustability and 22-position compression and 20-position rebound damping adjustability/ 12.4 inch travel; 48mm inverted, Kayaba PSF with DLC coated sliders, 22-position compression and 20-position rebound dampening adjustment/12.4 inch travel.
  • Suspension (Rear): Uni-Trak single shock system with four-way rebound damping and fully adjustable spring preload/9.4 inch travel; Uni-Trak single-shock system with 4-way compression and 16-way rebound damping, plus adjustable spring preload/10.8 inch travel (85, 100); 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 inch 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 inch travel.
  • Wheelbase: 44.1, 49.4, 50.8, 58.1, 58.3 inches
  • Rake: 27 degress (65, 85, 100), 28.7 degrees, 26.9 degrees
  • Trail: 2.4, 3.5, 4.1, 5.0, 4.4 inches
  • Seat Height: 29.9, 33.1, 34.3, 37.4, 37.6
  • Curb Weight: 132.2, 152.1, 156.5, 233.6, 248.0 pounds
  • Tires (Front): 60/100x14 , 70/100x17, 70/100x19, 80/100-21, 80/100-21
  • Tires (Rear): 80/100x12, 90/100x14, 90/100x16, 100/90-19, 120/80-19


  • Billet Lever and Perch Assembly: Made by Works Connection, this perch is precision machined from billet aluminum for durability. Lever has sealed ball bearings for ultra-smooth lever pull. Nylon sleeve allows the perch to rotate upon impact. Rubber boot keeps out dirt and grime.
  • Pro Circuit Airbox Screen Eliminator Kit: Eliminates the power-bobbing screen in the airbox. These items are intended for closed-course competition use only. Alteration of emissions-related components can constitute violation of federal and/or state laws. Substantial fines and penalties can result if used for other than closed-course competition use.

Key Competitors For The 2013 Kawasaki KX

  • 2013 Husqvarna WR
  • 2013 Yamaha YZ 125
  • 2013 Yamaha YZ 250
  • 2013 Yamaha YZ 400