TM Racing MX 85 Junior - 2005 Specifications and Reviews

The 2005 TM Racing MX 85 Junior is a lightweight motocross bike designed for young aspiring riders transitioning to competitive racing. Built around a liquid-cooled single-cylinder engine with advanced electronic ignition and hydraulic clutch control, it delivers responsive performance ideal for developing technique. Known for its nimble handling and reliable powerband, this machine excels in junior racing classes and training environments.

1 stars Average rating: 1 from 1 votes
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General information

CategoryCross / motocross
Year2005
ModelTM racing MX 85 Junior

Engine and Transmission Specifications

ClutchMultiple-disk in oil-bath with hydraulic control
Transmission typefinal driveChain
Cooling systemLiquid
StarterKick
IgnitionKoukusan CDI electronic w/ variable advance
Fuel systemCarburettor. Mikuni 28
Bore x stroke47.9 x 47.0 mm (1.9 x 1.9 inches)
Compression17.2:1
Stroke2
Engine typeSingle cylinder
Capacity:85.00 ccm (5.19 cubic inches)

Physical measures and capacities

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter260 mm (10.2 inches)
Front brakesSingle disc
Rear tyre dimensions90/100-14
Front tyre dimensions70/100-17
Rear suspensionWP
Front suspensionPaioli USD 43 mm
Frame typeCr-Mo steel. Perimetral oval section.
 
 

Speed and acceleration

Fuel capacity7.00 litres (1.85 gallons)
 
 

Other specs

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

Performance Profile & Rider Fit

Best For

Track60%
City5%
Cornering70%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a competition-focused 85cc youth motocross machine intended for young, developing riders with prior dirt-bike experience, not beginners; note that the specification data provided appears to mix in unrelated figures from a separate large ATV/UTV mo
PurposeBuilt purely for motocross racing on closed off-road tracks, not for street use, commuting, or general recreation.
Rider FitDesigned for a lightweight junior rider with the fitness and skill to manage a high-revving two-stroke and aggressive suspension travel over jumps and rough terrain.
CharacterA sharp, race-bred two-stroke with premium suspension components (Paioli and Ohlins) that rewards aggressive, precise riding and rapid direction changes.
Not Ideal ForNot suitable for adult riders, road riding, touring, passengers, or anyone seeking a comfortable or beginner-friendly bike.

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

Rider Reviews

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