TM Racing MX 300 - 2011 Specifications and Reviews

The 2011 TM Racing MX 300 is a lightweight motocross bike engineered for competitive amateur and semi-professional riders seeking high-performance handling. Built around a perimetral aluminium frame with premium Marzocchi USD forks and optional Ohlins rear suspension, it delivers nimble agility and responsive control. Known for its kick-start simplicity and race-ready Brembo braking system, the MX 300 excels in technical terrain and tight track conditions.

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General information

CategoryCross / motocross
Year2011
ModelTM racing MX 300

Engine and Transmission Specifications

ClutchMultiple-disk in oil bath with hydraulic control
Transmission type,final driveChain
Gearbox5-speed
Cooling systemLiquid
Lubrication system3.5% mixture
IgnitionKokusan CDI
Fuel systemCarburettor. Keihin PWM 38
Bore x stroke72.0 x 72.0 mm (2.8 x 2.8 inches)
Engine detailsV-Force Reed valve
Engine typeSingle cylinder, two-stroke
Capacity:294.00 ccm (17.94 cubic inches)
 
 

Brakes, suspension, Frame and wheels

WheelsBlue rims.
Rear brakes diameter245 mm (9.6 inches)
Rear brakesSingle disc. Nissin pump and Brembo caliper
Front brakes diameter270 mm (10.6 inches)
Front brakesSingle disc. Nissin pump and Brembo caliper
Rear tyre dimensions110/90-19
Front tyre dimensions100/90-21
Rear suspensionSachs Boge, optional Ohlins
Front suspensionMarzocchi USD 50mm
Frame typePerimetral aluminium section
 
 

Physical measures and capacities

Fuel capacity8.70 litres (2.30 gallons)

Other specs

MaintenanceFind parts, fluids, filters, maintenance tools and service items on eBay
Wheelbase1,280 mm (50.4 inches)
Ground clearance305 mm (12.0 inches)
Overall width1,250 mm (49.2 inches)
Overall length2,030 mm (79.9 inches)
Overall height1,300 mm (51.2 inches)
Seat height918 mm (36.1 inches) If adjustable, lowest setting.
Power/weight ratio0.0545 HP/kg
Dry weight364.0 kg (802.5 pounds)
Rear tyre22/10-12
Front tyre25/8-12
Rear SuspensionDouble A-Arm, IRS
Front SuspensionDouble A-Arm
Driveline4x4. L/H/N/R transmission shift. CVT
Fuel controlSingle Overhead Cams (SOHC)
Bore x Stroke92.0 x 75.6 mm (3.6 x 3.0 inches)
Power19.85 HP (14.5 kW) @ 7000 RPM
Capacity:503.00 ccm (30.69 cubic inches)
Color optionsLight blue
StarterKick

Performance Profile & Rider Fit

Best For

Track85%
City5%
Cornering88%
Daily Riding8%
Touring8%
Passenger5%

Rider Profile

Best ForThis is a purebred competition two-stroke best suited to experienced off-road or motocross riders comfortable with a peaky, aggressive power delivery and no electric starter.
PurposeBuilt purely for motocross and cross-country racing, not for street use or commuting.
Rider FitDemands a fit, athletic rider able to stand, shift weight actively, and kick-start the bike, as it has no mirrors, lights, or passenger accommodations.
CharacterA light, razor-sharp, high-revving two-stroke that rewards aggressive riding and rewards technical skill with explosive acceleration and exceptional agility.
Not Ideal ForNot suitable for beginners, daily commuting, road riding, or anyone seeking comfort, touring range, or a passenger seat.

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

Rider Fit Visualizer

2011 TM racing TM Racing MX 300 Rider Ergonomics Assessment

Calculated in your browser only - your height/inseam are never sent to our servers.

Feet:

At 918mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with cannot reach comfortably on the 2011 TM racing TM Racing MX 300, with a cramped knee angle of around 80 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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