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Key Specifications
Engine
Single cylinder, two-stroke
Fuel Capacity
8.00 litres
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Full 2021 Yamaha YZ125X Specifications
Colours
Team Yamaha Blue
Warranty
30 Day Limited Factory Warranty
Width (mm)
825 mm
Width (in.)
32.5 inches
Wheelbase (mm)
1455 mm
Wheelbase (in.)
57.3 inches
Seat Height (mm)
975 mm
Seat Height (in.)
38.4 inches
Length (mm)
2141 mm
Length (in.)
84.3 inches
Height (mm)
1285 mm
Height (in.)
50.6 inches
Ground Clearance (mm)
351 mm
Ground Clearance (in.)
13.8 inches
Wet Weight (lbs.)
209.0 pounds
Wet Weight (kg)
94.8 kg
Oil Capacity (Quarts)
0.74 US quarts
Oil Capacity (l)
0.70 litres
Fuel Capacity (l)
8.00 litres
Fuel Capacity (gal.)
2.11 US gallons
Bore x Stroke (mm)
54.0 x 54.5 mm
Displacement (cc)
125.0 cc
Displacement (ci)
7.63 cubic inches
Engine Type
Single cylinder, two-stroke
Bore x Stroke (in,)
2.1 x 2.1 inches
Engine Detail
Reed-valve-inducted
Fuel System
Carburettor. Mikuni TMX 38
Compression Ratio
8.8:1
Engine Lubrication
Premix
Ignition
CDI
Starter
Kick
Clutch
O-ring chain
Final Drive
Chain (final drive)
Gearbox
6-speed
Trail (in.)
4.6 inches
Trail (mm)
117 mm
Wheel Travel - Front (in.)
11.8 inches
Wheel Travel - Front (mm)
300 mm
Wheel Travel - Rear (in.)
12.4 inches
Wheel Travel - Rear (mm)
315 mm
Frame Type
Semi-double cradle aluminium frame
Suspension - Front
KYB® Speed-Sensitive System inverted fork; fully adjustable
Suspension - Rear
KYB® single shock; fully adjustable
Rake
26.8°
Brakes - Front
Single disc. Hydraulic.
Brakes - Rear
Single disc. Hydraulic.
Rims
Dunlop® AT81 tires
Tyres - Front
90/90-21
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