Compare Dirt Bikes

Pick any two bikes to see specs and photos side by side. Differences are highlighted. Blank = not yet verified for that year-model (we don’t guess).

Kawasaki

2023 Kawasaki KX450X

Yamaha

2023 Yamaha YZ450FX

Class	450cc 4-stroke	450cc 4-stroke
Displacement	—	450cc
Bore × stroke	—	97 × 60.9 mm
Cooling	—	—
Induction	Single-cylinder, DOHC (Dual Overhead Camshaft)	Mikuni fuel injection, 44mm
Power valve	—	—
Starter	Electric starter	—
Transmission	6-speed	5-speed
Front suspension	43 mm inverted telescopic fork with hydraulic damping	KYB spring-type fork with speed sensitive damping; fully adjustable, 12.2-in travel
Front travel	120 in	12.2 in
Rear travel	150 in	12.5 in
Front brake	310mm	270mm
Rear brake	280mm	240mm
Front wheel	—	—
Rear wheel	—	—
Seat height	680 in	37.6 in
Wheelbase	53.1 in	58.3 in
Weight	205 lb (Dry weight (with fuel))	254 lb (wet weight)
Fuel capacity	1.94 gal	2.2 gal
MSRP	$6,799	—

Highlighted (blue) values differ. Verified manufacturer data; see each bike’s page for sources. Torque/fluid specs are on the individual pages (service-manual only).