Beta Alp 125 - 2009 Specifications and Reviews

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General information

CategoryTrial
ModelBeta Alp 125
Year2009

Engine and Transmission Specifications

ClutchWet multi-disc clutch
Gearbox5-speed
Cooling systemAir
Lubrication systemforced with pump
StarterElectric & kick
Fuel controlSOHC
Fuel systemCarburettor. Mikuni UCAL 5Nh 26-38
Bore x stroke54.0 x 54.0 mm (2.1 x 2.1 inches)
Compression10.5:1
Stroke4
Engine typeSingle cylinder
Capacity:124.00 ccm (7.57 cubic inches)
 
 

Physical measures and capacities

Wheelbase1,372 mm (54.0 inches)
Ground clearance298 mm (11.7 inches)
Overall width820 mm (32.3 inches)
Overall length2,143 mm (84.4 inches)
Overall height1,150 mm (45.3 inches)
Seat height850 mm (33.5 inches) If adjustable, lowest setting.
Dry weight101.0 kg (222.7 pounds)

Beta Alp 125 dimensions and frame

Rear brakes diameter220 mm (8.7 inches)
Rear brakesSingle disc
Front brakes diameter245 mm (9.6 inches)
Front brakesSingle disc
Rear tyre dimensions120/80-18
Front tyre dimensions90/90-21
Rear suspension travel180 mm (7.1 inches)
Rear suspensionMonoshock with adjustable spring preload
Front suspension travel170 mm (6.7 inches)
Front suspensionHydraulic fork with 38 mm shaft
Frame typesteel double cradle frame

Speed and acceleration

Reserve fuel capacity1.50 litres (0.40 gallons)
Fuel capacity6.80 litres (1.80 gallons)
 
 

Other specs

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

Performance Profile & Rider Fit

Best For

Track5%
City25%
Cornering40%
Daily Riding15%
Touring10%
Passenger5%

Rider Profile

Best ForBest suited to riders with some off-road or trials background, as the bike's light weight and tall stance reward balance and technical skill more than raw experience.
PurposeBuilt specifically for technical trials riding and obstacle navigation rather than speed, distance, or road use.
Rider FitIts featherweight 101 kg dry mass and slim profile make it very easy to muscle around and hold up, though the tall 850 mm seat height demands decent leg reach.
CharacterA pure, minimalist trials tool that thrives on razor-sharp low-speed agility, tractable low-end power delivery, and total rider control over the bike's balance.
Not Ideal ForNot for riders wanting highway speed, passenger carrying, long-distance comfort, or any kind of touring capability.

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

Rider Reviews

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