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Specifications forYamaha YZ125X
Specifications	Yamaha YZ125X Yamaha · 2027
Engine
DisplacementGreater displacement does not necessarily mean better performance.	125cc 125cc liquid-cooled 2-stroke; reed-valve inducted
Engine configuration	125cc liquid-cooled 2-stroke; reed-valve inducted
Bore × stroke	54.0 mm × 54.5 mm
Compression ratio	7.8~10.2:1
Fuel system	Hitachi Astemo® Keihin PWK38S
Cooling system	Liquid-cooled 125cc liquid-cooled 2-stroke; reed-valve inducted
Dimensions and weight
Ready-to-ride weightLower weight with fuel and fluids, assessed separately from dry weight.	96.16kg 212 lb
Seat heightA lower seat. The right height depends on your stature.	970.28mm 38.2 in
Declared dimensions	84.8 in x 32.5 in x 50.8 in
Wheelbase	1455.42mm 57.3 in
Ground clearance	355.6mm 14.0 in
Consumption and drivetrain
Fuel tank capacityA larger tank. Range also depends on fuel consumption.	6.81L 1.8 gal
Chassis, brakes and suspension
Anti-lock braking (ABS)ABS status for this variant. “—” means data is unavailable.	Unknown Hydraulic disc, 270mm · Hydraulic disc, 240mm
Front suspension	KYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Rear suspension	KYB® single shock; fully adjustable, 12.4-in travel
Front brake	Hydraulic disc, 270mm
Rear brake	Hydraulic disc, 240mm
Front tyre	80/100-21 Dunlop® Geomax MX33F
Rear tyre	110/100-18 Dunlop® Geomax MX33
Steering angle	26.4°
Trail	111.76mm 4.4 in
Fuel and transmission
Transmission	6-speed; multiplate wet clutch
Final drive	Chain
Data source	Specification source

Specifications forYamaha YZ125X
Yamaha YZ125X
Engine
DisplacementGreater displacement does not necessarily mean better performance.
125cc 125cc liquid-cooled 2-stroke; reed-valve inducted
Engine configuration
125cc liquid-cooled 2-stroke; reed-valve inducted
Bore × stroke
54.0 mm × 54.5 mm
Compression ratio
7.8~10.2:1
Fuel system
Hitachi Astemo® Keihin PWK38S
Cooling system
Liquid-cooled 125cc liquid-cooled 2-stroke; reed-valve inducted
Dimensions and weight
Ready-to-ride weightLower weight with fuel and fluids, assessed separately from dry weight.
96.16kg 212 lb
Seat heightA lower seat. The right height depends on your stature.
970.28mm 38.2 in
Declared dimensions
84.8 in x 32.5 in x 50.8 in
Wheelbase
1455.42mm 57.3 in
Ground clearance
355.6mm 14.0 in
Consumption and drivetrain
Fuel tank capacityA larger tank. Range also depends on fuel consumption.
6.81L 1.8 gal
Chassis, brakes and suspension
Anti-lock braking (ABS)ABS status for this variant. “—” means data is unavailable.
Unknown Hydraulic disc, 270mm · Hydraulic disc, 240mm
Front suspension
KYB® Speed-Sensitive System inverted fork; fully adjustable, 11.8-in travel
Rear suspension
KYB® single shock; fully adjustable, 12.4-in travel
Front brake
Hydraulic disc, 270mm
Rear brake
Hydraulic disc, 240mm
Front tyre
80/100-21 Dunlop® Geomax MX33F
Rear tyre
110/100-18 Dunlop® Geomax MX33
Steering angle
26.4°
Trail
111.76mm 4.4 in
Fuel and transmission
Transmission
6-speed; multiplate wet clutch
Final drive
Chain
Data source
Specification source

Green marks an advantage in that specification. “—” means data is unavailable.

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Yamaha YZ125X

Yamaha YZ125X