The 2008 Beta REV-3 125 is a lightweight trial motorcycle designed for riders seeking technical off-road performance and maneuverability. Its 124cc liquid-cooled single-cylinder engine and featherweight 70kg frame make it ideal for beginners and intermediate trial competitors navigating complex terrain. Known for precise handling and low-speed control, it remains popular for learners developing core trial skills.
Editorial estimate from the spec sheet - not lab tested
Off-road & trail98%
Cornering60%
City riding10%
Daily riding5%
Touring3%
Two-up0%
Track5%
Best for
Built purely for technical trial competition, obstacle negotiation, and ultra-low-speed balance and control rather than any kind of speed or distance riding.
Built for
A featherweight, high-revving 2-stroke trial tool with razor-sharp low-speed responsiveness and no concession to comfort or cruising ability.
Not ideal for
Not suitable for riders wanting highway speed, passenger carrying, touring range, or everyday street commuting.
Scores are derived from the spec sheet using the same model across every bike, so they compare like for like.
Full specifications
Engine
Capacity
124.0 ccm
Power
15.0 HP (11.0 kW)
Engine type
Single
Power/weight ratio
0.2143 HP/kg (dry)
Bore x stroke
54.0 x 54.0 mm
Compression
14.0:1
Cooling system
Liquid
Fuel system
Carburettor
Ignition
Electronic AET 12V - 85W
Lubrication system
Mix with fuel 1,5 % (synthetic oil)
Transmission
Gearbox
6-speed
Transmission type
Manual
Final drive
Chain
Clutch
Wet multi-disc clutch with cush-drive rubber
Dimensions & weight
Wheelbase
1310 mm
Overall length
1990 mm
Overall width
850 mm
Overall height
1120 mm
Seat height
660 mm
Dry weight
70.0 kg
Fuel capacity
3.00 litres
Ground clearance
310 mm
Reserve fuel capacity
0.80 litres
Chassis & suspension
Frame
Double wave aluminium beam
Front suspension
Hydraulic fork with 38 mm shaft
Rear suspension
Hydraulic monoshock
Front wheel travel
38 mm
Rear wheel travel
165 mm
Brakes & wheels
Front brakes
Single disc. 4 piston caliper
Front brakes diameter
185 mm
Rear brakes
Single disc. 2 piston caliper
Rear brakes diameter
165 mm
Front tyre
2.75-21
Rear tyre
4.00-18
Other
Modifications compared to previous model
Technical Modifications 2008 New fork settings: developed with the younger rider in mind, the result is a more reactive and lively response so as to make moves at a standstill easier. New shockabsorber settings. More stable performance over time, combined with greater reliability. New Keihin PWK 28 mm carburettor. New crankcase. New design for cylinder porting. Shorter clutch hose: less weight combined with a more precise and direct action. New main bearings: these ensure greater smooth
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
2006
2007
2008
Capacity
124 cc
124 cc
124 cc
Dry weight
71 kg
72 kg
70 kg
Seat height
660 mm
660 mm
660 mm
Fuel capacity
4.2 L
3.2 L
3 L
Illustrative - generated automatically by diffing the year records already on file, not a manufacturer-published changelog.
Rider Reviews
—
☆☆☆☆☆
Be the first to rate
Please log in or register if you'd like to leave a comment.
Please log in or register if you'd like to leave a comment.
Own one? Add it to My Garage and write an owner review with an Owner badge.