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).

Yamaha

2021 Yamaha YZ125X

Class	125cc 2-stroke
Displacement	—
Bore × stroke	—
Cooling	—
Induction	Ported DOHC four-valve per cylinder head with dual overhead cams and twin throttle bodies
Power valve	—
Starter	Electric starter
Transmission	5-speed
Front suspension	41mm inverted telescopic fork
Front travel	—
Rear travel	—
Front brake	300mm
Rear brake	245mm
Front wheel	—
Rear wheel	—
Seat height	34.2 in
Wheelbase	56.9 in
Weight	145 lb (Dry weight, fully assembled and ready to ride)
Fuel capacity	2 gal
MSRP	—

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).