Yamaha YZ125 - 2010 Specifications and Reviews

The 2010 Yamaha YZ125 is a lightweight two-stroke motocross bike designed for junior riders and those transitioning to competitive racing. Known for its responsive handling and aggressive styling, the YZ125 delivers the power and agility needed for track dominance. Its speed-sensitive suspension and liquid-cooled engine make it a proven platform for developing young racing talent.

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General information

CategoryCross / motocross
Year2010
ModelYamaha YZ125

Engine and Transmission Specifications

Transmission type,final driveChain
Gearbox6-speed
Cooling systemLiquid
IgnitionCDI
Fuel systemCarburettor. Mikuni® TMX 38
Bore x stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Compression8.6:1
Engine typeSingle cylinder, two-stroke
Capacity:124.00 ccm (7.57 cubic inches)
 
 

Brakes, suspension, Frame and wheels

Rear brakes diameter245 mm (9.6 inches)
Rear brakesSingle disc
Front brakes diameter250 mm (9.8 inches)
Front brakesSingle disc
Rear tyre dimensions100/90-M19
Front tyre dimensions80/100-M21
Rear suspension travel315 mm (12.4 inches)
Rear suspensionFully adjustable single shock
Front suspension travel300 mm (11.8 inches)
Front suspensionSpeed-sensitive system inverted fork

Physical measures and capacities

Fuel capacity7.94 litres (2.10 gallons)
Wheelbase1,443 mm (56.8 inches)
Ground clearance386 mm (15.2 inches)
Overall width828 mm (32.6 inches)
Overall length2,136 mm (84.1 inches)
Overall height1,316 mm (51.8 inches)
Seat height998 mm (39.3 inches) If adjustable, lowest setting.
Weight incl. oil, gas, etc94.3 kg (208.0 pounds)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Color optionsTeam Yamaha Blue/White

Rider Fit Visualizer

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Feet:

At 998mm, a rider of 68.9" with a 31" (estimated) inseam will reach the ground with cannot reach comfortably on the 2010 Yamaha YZ125, with a moderate knee angle of around 90 degrees and an upright riding position.

Data quality: measured. Assumes about 30mm of suspension sag once seated (a typical street-bike rule of thumb - stiffer or softer suspension will vary). This is an approximation from category-typical geometry and generic body proportions, not a measurement of this specific bike or you - sit on it before you buy.

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