Beta Alp125: history, specs, pictures

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Beta Alp125
Manufacturer
Also called ALP125, ALP 125, Alp 125
Production 2001 - 2012
Engine
single cylinder, four-stroke
Bore / Stroke 66.0mm x 58.2mm
Top Speed 56 mph (90 km/h)
Horsepower 10.73 HP (8.0 KW) @ 9800RPM
Fuel System carburetor. mikuni bst 31 42ad
Ignition electronic
Transmission Gear box: 5-speed

Final Drive: chain

Clutch: wet multi-disc
Suspension Front: hydraulic fork, ø38 mm
Rear: monoshock with adjustable spring preload
Brakes Front: single disc
Rear: single disc
Front Tire 90/90-21
Rear Tire 120/80-18
Wheelbase 53.94 inches (1370 mm)
Length 82.09 inches (2085 mm)
Width 32.28 inches (820 mm)
Height 46.06 inches (1170 mm)
Seat Height 32.68 inches (830 mm)
Weight 237.0 pounds (107.5 Kg) (dry),
Fuel Capacity 1.8 Gallon (6.80 Liters)
Manuals Service Manual


The Beta Alp125 was a single cylinder, four-stroke standard produced by Beta between 2001 and 2012. It could reach a top speed of 56 mph (90 km/h). Claimed horsepower was 10.73 HP (8.0 KW) @ 9800 RPM.

Engine[edit | edit source]

The engine was a air cooled single cylinder, four-stroke. A 66.0mm bore x 58.2mm stroke result in a displacement of just 124.0 cubic centimeters. Fuel was supplied via a single overhead cams (sohc).

Drive[edit | edit source]

The bike has a 5-speed transmission. Power was moderated via the wet multi-disc.

Chassis[edit | edit source]

It came with a 90/90-21 front tire and a 120/80-18 rear tire. Stopping was achieved via single disc in the front and a single disc in the rear. The front suspension was a hydraulic fork, ø38 mm while the rear was equipped with a monoshock with adjustable spring preload. The Alp125 was fitted with a 1.8 Gallon (6.80 Liters) fuel tank. The bike weighed just 237.0 pounds (107.5 Kg). The wheelbase was 53.94 inches (1370 mm) long.