Technical Specifications of Yamaha AT1 125cc
The Yamaha AT1 was a single cylinder dual-sport / enduro bike made by Yamaha Motor Company from 1969 to 1971.
There were three main modifications made to the Yamaha AT1, each corresponding to the year of the production. The original model was 1969 Yamaha AT1, followed by Yamaha AT1B in 1970 and finally Yamaha AT1C in 1971. A Motocross edition, marked with suffix "M" was also introduced each year. The M or MX models were lighter and had several performance enhancing modifications, such as higher compression ratio, larger carburetor, tuned exhaust etc.
Model: Yamaha AT1 125
Versions: Yamaha AT1 (100101-119829), Yamaha AT1B (120101-138890), Yamaha AT1M (300101-303790), Yamaha AT1MX (310101-312326), Yamaha AT1C (139101-162879), Yamaha AT1M-C (313101-317191)
Year: 1969-71
Motorcycle Type: Dual sport / Enduro
Dry weight: 94.0 kg
Ground clearance: 225 mm (8.85 inches)
Fuel tank size: 7.2 litres (1.6 gallons)
Colour options: Pearl White, Competition Yellow, Brilliant Red
Engine, Intake & Transmission
Displacement: 123 cc
Engine: Single, two-stroke
Top speed: 97 km/h (60 mph)
Fuel system: Carburettor
Fuel control: Port control
Ignition: Points
Lubrication system: Autolube
Cooling system: Air cooled
Gearbox: 5-speed
Transmission: Wet, multiple disc with Chain
Start up: Electric start & Kick-start
Chassis, suspension, brakes and wheels
Frame type: Steel tube – double tubular cradle
Front suspension: Hydraulic telescopic fork
Rear suspension: Twin shocks
Front brakes: Drum brake
Rear brakes: Drum brake