KX design philosophy is simple: put mid-level to expert riders on the top step of the podium – and that is what the KX450F does best. Engine and chassis performance delivers what riders need to win. And complimenting this dominant performance, the KX450F is loaded with advanced technology with industry firsts that give riders an even greater edge.
With shipment Shipment Name 2 for $0.00



Bore and stroke 96.0 x 62.1 mm
Starting Primary Kick
Displacement 449cc
Ignition Digital DC-CDI
Type 4-stroke, Single
Fuel system Digital fuel injection with 43 mm Keihin throttle body
Valve system DOHC, 4 valves
Cooling Liquid
Compression ratio 12.8:1
Lubrication Forced lubrication (semi-dry sump)


Rear: type Single 240 mm petal disc
Front: calipers Dual-piston caliper
Front: type Single rigid mount 270 mm petal disc
Rear: calipers Single-piston caliper


Ground clearance 340 mm
Wheelbase 1,495 mm
Overall height 1,275 mm (50.4 in.)
Fuel capacity 6.2 litres (1.59 gal.)
Overall width 820 mm (32.3 in.)
Curb mass** 112.1 kg (250 lbs.)
Overall length 2,195 mm
Seat height 955 mm (37.8 in.)


Final drive Chain
Gear ratio: 4th 1.000 (19/19)
Transmission 5-speed, constant mesh, return shift
Gear ratio: 3rd 1.188 (19/16)
Gear ratio: 2nd 1.412 (24/17)
Clutch Wet multi-disc, manual
Gear ratio: 1st 1.750 (28/16)
Final reduction ratio 3.846 (50/13)
Primary reduction ratio 2.727 (60/22)
Gear ratio: 5th 0.875 (21/24)


Tire: front 80/100-21
Steering angle (left/right) 42°/42°
Wheel travel: front 314 mm (12.4 in.)
Trail 113 mm (4.57 in.)
Type Perimeter, Aluminum
Caster (rake) 26.9°
Tire: rear 120/80-19
Wheel travel: rear 315 mm (12.4 in.)


Suspension, rear New Uni-Trak linkage system and Kayaba shock with 22-position low-speed and 2-turns or more high-speed compression damping, 22-position rebound damping and fully adjustable spring preload
Suspension, front ø49 mm inverted telescopic Separate Function front Fork Air - Triple Air Chamber (SFF-Air TAC)
Years 2015, 2014, 2013