In May 1985, Aprilia unveiled the AS 125 R at Gardone Riviera, a sleek and refined iteration of their ST 125 model from 1983.
The introduction of the Austrian Rotax engine marked a significant evolution in the AS-R’s performance, boasting a modern exhaust valve and RAVE system that elevated its power and maturity.
This potent new engine transformed the riding experience, imbuing the AS-R with more robustness and a refined, yet sporty character. Although it didn’t quite match the Honda NS-F for refinement, the AS 125 R proved itself to be an exhilarating ride, perfect for those seeking excitement on two wheels.
Key Specifications
Engine Type
Two stroke, single cylinder
Engine Capacity
124 cc / 7.6 cu in
Max Power
19.4 kw / 26 hp
Seat Height
31.5 inches / 800 mm
*n/a – information not provided by manufacturer
All Specifications
Make & Model
Model
Aprilia AS 125R
Year
1985-86
Engine
Engine Type
Two stroke, single cylinder
Displacement
124 cc / 7.6 cu in
Bore x Stroke
54 mm x 54 mm
Compression Ratio
14.2:1
Max Horsepower
19.4 kw / 26 hp
Engine Management System
Dell’Orto PHBH AS 26 mm carburetor
Cooling System
Liquid cooled
Performance
Top Speed
145 km/h / 90 mph
*n/a – information not provided by manufacturer
Transmission
Clutch
Multi-disc oil bath
Gearbox
6 Speed
Final Drive
Chain
Electrical & Electronics System
Starter
Electric and kick
Chassis & Suspension
Frame Type
Double cradle tubular steel
Front Suspension
Marzocchi 32 mm, non-adjustable
Rear Suspension
Swingarm with single shock absorber
Wheels & Brakes
Front Tire Size
100-90 -16
Rear Tire Size
100-90 -18
Front Brakes
Single 240 mm disc
Rear Brakes
Single 230 mm disc
Dimension & Weights
Seat Height
31.5 inches / 800 mm
Wheelbase
53.7 inches / 1365 mm
Dry Weight
117 kg / 258 lbs
Features
Presented with a new Austrian Rotax engine
Engine previously known as Hiro
R indicates the presence of the new engine
Slight evolution of previous ST and STX models
New exhaust valve and RAVE system
Modern Rotax 127 engine
Provides outstanding performance
More robust than its ancestor STX
More mature than its ancestor STX
A more powerful bike
More fun to drive than the STX
Available in red and gray colors
Price: Lire 3,430,000 turnkey
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*We strive to provide the most comprehensive and accurate specifications possible. However, certain details may not be available if the manufacturer did not disclose them or if the information is no longer publicly accessible. If you find any discrepancy with any data on this site, please feel free to let us know at contact@throttlecraze.com
