TM Racing MX 125 - 2005 Specifications and Reviews

The 2005 TM Racing MX 125 is a competitive 125cc motocross bike designed for intermediate to advanced riders seeking race-oriented performance. Its liquid-cooled two-stroke engine with high 16.7:1 compression and electronic ignition delivers sharp power delivery ideal for technical track conditions. Known for responsive handling and reliable five-speed transmission, it excels in amateur racing and cross-country competition.

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General information

CategoryCross / motocross
Year2005
ModelTM racing MX 125

Engine and Transmission Specifications

ClutchMultiple-disk in oil-bath with hydraulic control
Transmission typefinal driveChain
Gearbox5-speed
Cooling systemLiquid
StarterKick
IgnitionKoukusan CDI electronic w/ variable advance
Fuel systemCarburettor. Keihin PWM 38 mm diameter
Bore x stroke54.0 x 54.5 mm (2.1 x 2.1 inches)
Compression16.7:1
Stroke2
Engine typeSingle cylinder
Capacity:123.50 ccm (7.54 cubic inches)
 
 

Physical measures and capacities

Rear brakes diameter245 mm (9.6 inches)
Rear brakesSingle disc
Front brakes diameter270 mm (10.6 inches)
Front brakesSingle disc
Rear tyre dimensions100/90-19
Front tyre dimensions90/90-21
Rear suspensionOhlins
Front suspensionKayba/Paioli USD 48 mm
Frame typeCr-Mo steel. Perimetral oval section.

Speed and acceleration

Fuel capacity8.00 litres (2.11 gallons)

Other specs

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

Performance Profile & Rider Fit

Best For

Track90%
City5%
Cornering80%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a purebred competition motocross machine best suited to experienced off-road riders who already know how to manage a peaky two-stroke power delivery.
PurposeBuilt exclusively for motocross racing and rough terrain riding rather than any form of road use.
Rider FitIts light, slim, kick-start-only chassis demands good physical fitness and confidence standing on the pegs for extended moto sessions.
CharacterA sharp, aggressive, race-focused two-stroke with premium Italian components that rewards aggressive, skilled inputs.
Not Ideal ForThis is not the right bike for commuting, touring, carrying a passenger, or anyone seeking a comfortable, road-legal, beginner-friendly ride.

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

Rider Reviews

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