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Motocross Bikes

2008TM Racing MX 125

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The 2008 TM Racing MX 125 is a competitive two-stroke motocross bike engineered for serious junior and amateur racers. Its liquid-cooled 123cc single-cylinder engine delivers sharp power delivery through a five-speed gearbox, while premium suspension options from Marzocchi and Ohlins ensure excellent handling on demanding tracks. Known for reliable performance and race-ready engineering, it remains a proven platform for aspiring motocross competitors.

Capacity
123.5 ccm
Engine
Single, two-stroke
Gearbox
5-speed
Dry weight
Not on record
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Seat height
918 mm
Power
15.0 HP (11.0 kW)
⇄ Compare with another bike + Add to garage All model years

What’s new for the 2008 TM Racing MX 125

vs the 2007
Spec20072008
Fuel capacity 8.00 litres (2.11 US gallons) 8.70 litres (2.30 US gallons)
Front brakes Single disc. Nissin pump and Brembo caliper Single disc
Rear brakes Single disc. Nissin pump and caliper Single disc
Other years 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 2016 2017 2018 2019

How it rides

Editorial estimate from the spec sheet - not lab tested
Speed 44Agility 85Comfort 30Off-road 97Touring 10Road manners 15
Off-road & trail97%
Cornering80%
City riding5%
Daily riding5%
Touring5%
Two-up0%
Track90%
Best for
Built exclusively for motocross racing and rough terrain riding rather than any form of road use.
Built for
A sharp, aggressive, race-focused two-stroke with premium Italian components that rewards aggressive, skilled inputs.
Not ideal for
This is not the right bike for commuting, touring, carrying a passenger, or anyone seeking a comfortable, road-legal, beginner-friendly ride.

Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.

Will it fit you?

Worked out in your browser - nothing is sent to us
At 918mm, a rider of 68.9" with a 31" (estimated) inseam will not reach the ground comfortably on the 2008 TM Racing MX 125, with a cramped knee angle of around 80 degrees and an upright riding position.

Assumes about 30mm of suspension sag once seated. This is an approximation from category-typical geometry, not a measurement of this bike or of you - sit on one before you buy.

More bikes at over 900 mm — Sky High →

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Full specifications

Engine
Capacity
123.5 ccm
Power
15.0 HP (11.0 kW)
Engine type
Single, two-stroke
Bore x stroke
54.0 x 54.5 mm
Compression
16.7:1
Cooling system
Liquid
Fuel system
Carburettor
Starting
Kick
Ignition
Kokusan CDI Electronic with variable advance
Lubrication system
3.5% mixture
Transmission
Gearbox
5-speed
Transmission type
Manual
Final drive
Chain
Clutch
Multiple-disk in oil bath with hydraulic control
Dimensions & weight
Wheelbase
1280 mm
Overall length
2030 mm
Overall width
1250 mm
Overall height
1300 mm
Seat height
918 mm
Fuel capacity
8.70 litres
Ground clearance
305 mm
Dry weight
Not on record - add it
Chassis & suspension
Frame
Perimetral aluminium section
Front suspension
Marzocchi USD 50mm ( optional Ohlins 48mm )
Rear suspension
Sachs Boge (optional Ohlins )
Brakes & wheels
Front brakes
Single disc
Front brakes diameter
270 mm
Rear brakes
Single disc
Rear brakes diameter
245 mm
Front tyre
90/90-X21
Rear tyre
100/90-X19
Other
Color options
Blue

Specs last verified against published sources: .

Compiled from manufacturer documentation and user contributions, corrected on an ongoing basis. Spotted something wrong? Tell us.

What changed, year to year

Differences highlighted
Specification 200520082009201220162019
Capacity 124 cc 124 cc 124 cc 124 cc 124 cc 124 cc
Seat height 918 mm 918 mm 918 mm 918 mm 918 mm 918 mm
Fuel capacity 8 L 8.7 L 8.7 L 8.7 L 8.2 L 9.5 L

Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.

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Common questions

What is the engine size of the TM Racing MX 125?

The 2008 TM Racing MX 125 has a Capacity of 123.5 ccm (7.54 cubic inches).

What engine power does the TM Racing MX 125 have?

The 2008 TM Racing MX 125 has a Power of 15.0 HP (11.0 kW).

How many gears does the TM Racing MX 125 have?

The 2008 TM Racing MX 125 has a Gearbox of 5-speed.

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