PRC (pro Racing Cycles) LX-R - 2007 Specifications and Reviews

The 2007 PRC LX-R is a lightweight 49cc motocross machine designed for young riders and beginners entering competitive racing. Featuring a high-revving liquid-cooled single-cylinder engine with carbon tech reeds and CDI ignition, it delivers responsive performance on closed circuits. Best known for its nimble handling and reliability, the LX-R remains an excellent entry-level competition motorcycle.

2007
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Engine and Transmission Specifications

Transmission typefinal driveChain
GearboxAutomatic
Cooling systemLiquid
Lubrication systemPremix 40:1
StarterKick
IgnitionCDI
Fuel controlPort control
Fuel systemCarburettor. PRC 'VM19s' Carbon Tech single stage Reeds
Bore x stroke39.5 x 40.0 mm (1.6 x 1.6 inches)
Compression8.9:1
Max RPM14800
Stroke2
Engine typeSingle cylinder
Capacity:49.00 ccm (2.99 cubic inches)
 
 

Physical measures and capacities

Wheelbase990 mm (39.0 inches)
Overall length1,382 mm (54.4 inches)
Seat height648 mm (25.5 inches) If adjustable, lowest setting.
Dry weight45.0 kg (99.2 pounds)
 
 

PRC (pro Racing Cycles) LX-R dimensions and frame

Rear brakes diameter80 mm (3.1 inches)
Rear brakesExpanding brake (drum brake)
Front brakes diameter160 mm (6.3 inches)
Front brakesSingle disc
Rear tyre dimensions2.75-10
Front tyre dimensions60/100-12
Rear suspensionOhlins: fully-adjustable spring preload
Front suspensionMARZOCCHI 32mm Mini-cross Telescopic, leading axle, adjustable damping
Rake (fork angle)26.0°
Frame type2nd generation PRC Steel Perimeter Frame; with Tapered stem bearings

Speed and acceleration

Top speed80.5 km/h (50.0 mph)

CategoryCross / motocross
Year2007
ModelPRC (Pro Racing Cycles) LX-R

Other specs

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

Performance Profile & Rider Fit

50 mph
Top Speed

Best For

Track20%
City5%
Cornering60%
Daily Riding5%
Touring5%
Passenger0%

Rider Profile

Best ForThis is a youth-oriented 50cc motocross machine, best suited to young or beginner riders learning off-road fundamentals under supervision.
PurposeBuilt purely for small-scale motocross and dirt track practice rather than any road or long-distance use.
Rider FitIts tiny 45kg dry weight and low 648mm seat height make it extremely manageable for lightweight or young riders, not adult-sized adults.
CharacterA miniature race-bred machine with a high-revving two-stroke engine and premium suspension components, mimicking full-size motocross bike handling in a small package.
Not Ideal ForNot suitable for adult commuting, highway travel, touring, or carrying a passenger given its size, low top speed, and youth-focused design.

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

Rider Fit Visualizer

2007 PRC (Pro Racing Cycles) PRC (pro Racing Cycles) LX-R Rider Ergonomics Assessment

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

Feet:

At 648mm, a rider of 175cm with a 79cm (estimated) inseam will reach the ground with both feet flat on the 2007 PRC (Pro Racing Cycles) PRC (pro Racing Cycles) LX-R, with a cramped knee angle of around 55 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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