Yamaha TT-R 125 - 2002 Specifications and Reviews

The 2002 Yamaha TT-R 125 is an entry-level motocross bike designed for young riders and beginners learning off-road skills. Its compact 125cc air-cooled single-cylinder engine delivers modest power while maintaining excellent manageability and reliability. Known for its lightweight frame, low seat height, and forgiving nature, the TT-R 125 remains an ideal training platform for aspiring motocross enthusiasts.

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General information

CategoryCross / motocross
Year2002
ModelYamaha TT-R 125

Engine and Transmission Specifications

Cooling systemAir
Fuel controlSOHC
Bore x stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Compression10.0:1
Torque9.85
Power9.80
Stroke4
Engine typeSingle cylinder
Capacity:123.70 ccm (7.55 cubic inches)

Physical measures and capacities

Wheelbase1,240 mm (48.8 inches)
Ground clearance265 mm (10.4 inches)
Overall width795 mm (31.3 inches)
Overall length1,839 mm (72.4 inches)
Overall height1,030 mm (40.6 inches)
Seat height775 mm (30.5 inches) If adjustable, lowest setting.
Dry weight74.0 kg (163.1 pounds)
 
 

Yamaha TT-R 125 dimensions and frame

Rear brakes diameter110 mm (4.3 inches)
Rear brakesExpanding brake
Front brakes diameter110 mm (4.3 inches)
Front brakesExpanding brake
Rear tyre dimensions90/100-14
Front tyre dimensions70/100-17
Rear suspension travel160 mm (6.3 inches)
Front suspension travel180 mm (7.1 inches)

Speed and acceleration

Power/weight ratio0.1324 HP/kg

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay

Performance Profile & Rider Fit

9.7 hp
Peak Power

Best For

Track5%
City15%
Cornering25%
Daily Riding15%
Touring8%
Passenger5%

Rider Profile

Best ForThis is a beginner-friendly machine, ideally suited to young or novice riders learning off-road basics.
PurposeBuilt as a small-displacement trail and pit bike for light off-road recreation rather than any road or performance use.
Rider FitIts low seat height and light dry weight make it very approachable for smaller or lighter riders, including teens.
CharacterA simple, low-stress, low-power trail bike that rewards patience and playful low-speed riding over outright thrills.
Not Ideal ForIt is not suitable for highway travel, passengers, touring, or riders seeking speed and power.

Character map is an editorial estimate based on this bike's specifications, not a lab-tested measurement.

Rider Fit Visualizer

2002 Yamaha TT-R 125 Rider Ergonomics Assessment

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Feet:

At 775mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2002 Yamaha TT-R 125, with a cramped knee angle of around 65 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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