Technical Overview
2004 Beta Rev 50 Technical Analysis & Specification Breakdown
At the heart of the 2004 Beta Rev 50 trial motorcycle, Beta utilizes a 49.9 cc (3 cu in) liquid-cooled single cylinder, two-stroke layout. Internal engine geometry specifies a bore and stroke of 40.0 x 39.7 mm (1.6 x 1.6 inches) with a 15.2:1 compression ratio.
Within MotoLibrary's Beta archive, this model family spans 2 indexed model years from 2004 to 2008, allowing buyers to track year-over-year changes in emissions tuning, weight and equipment.
Engine
Displacement 49.9 ccm (3.04 cubic inches)
Engine Type Single cylinder, two-stroke
Engine Details Single cylinder, two-stroke
Compression 15.2:1
Bore x Stroke 40.0 x 39.7 mm (1.6 x 1.6 inches)
Fuel System Carburettor
Cooling Liquid
Transmission
Gearbox 4-speed
Final Drive Chain (final drive)
Chassis
Front Suspension Tube, Ø 33 mm
Front Travel 160 mm (6.3 inches)
Rear Suspension Progressive hydraulic mono shock absorber
Rear Travel 146 mm (5.7 inches)
Wheels & Brakes
Front Brakes Single disc
Rear Brakes Single disc
More from Beta
Buying Checklist
Before You Compare This Bike
Use this page to compare this motorcycle by its real specifications, not only by model name. Focus on the details that affect fit, comfort, handling, range and ownership.
Brakes
Brake setup is worth comparing if you ride in traffic, mountains or with a passenger.
Suspension
Suspension details can matter for comfort, road feel and long-distance riding.
Transmission
Transmission and final drive affect maintenance, smoothness and everyday usability.
Rider Profile
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