Yamaha RD125LC (1983-84)

The Yamaha RD125LC YPVS was a two-stroke, single cylinder motorcycle produced from 1983 to 1984. It had a liquid-cooled, 123cc engine with a compression ratio of 6.4:1 and an autolube oil capacity of 1.1L. The bike had a 24mm Mikuni carburetor and Hitachi CDI ignition, and it was capable of producing a maximum power of 20hp at 9500rpm and a maximum torque of 1.6kgf-m at 9250rpm. The bike was equipped with a 6-speed transmission, chain final drive, and front suspension with 32mm telescopic forks. The rear suspension was a monocross linkage with 6-way preload adjustment. It had a single 245mm disc front brake and a 130mm drum rear brake. The bike’s dimensions were 1990mm in length, 735mm in width, and 1190mm in height. The wheelbase measured 1295mm and the seat height was 775mm. The dry weight of the bike was 98kg and it had a fuel capacity of 13 litres, with an average consumption of 64mpg. The standing 1/4 mile time was 16.7 seconds and the top speed was 81mph.

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Technical specifications:

Make Model: Yamaha RD 125LC YPVS

Year: 1983 – 84

Engine: Two stroke, single cylinder

Capacity: 123 cc / 7.5 cu-in

Bore x Stroke: 56 50 mm

Cooling System: Liquid cooled

Compression Ratio: 6.4:1

Lubrication: Autolube

Oil Capacity: 1.1 L

Induction: 24mm Mikuni carburetors

Ignition: Hitachi CDI

Starting: Kick

Max Power: 20 hp / 15.5 kW @ 9500 rpm

Max Torque: 1.6 kgf-m / 16 Nm @ 9250 rpm

Transmission: 6 Speed

Final Drive: Chain

Front Suspension: 32mm Telescopic forks

Rear Suspension: Monocross linkage 6-way preload adjustment

Front Brakes: Single 245mm disc

Rear Brakes: 130mm Drum

Front Tyre: 2.75-18-4PR

Rear Tyre: 3.00-18-6PR

Dimensions: Length 1990 mm / 78.3 in Width 735 mm / 28.9 in Height 1190 mm / 46.8 in

Wheelbase: 1295 mm / 50.9 in

Seat Height: 775 mm / 30.5 in

Ground Clearance: 185 mm / 7.2 in

Dry Weight: 98 kg / 216 lbs

Fuel Capacity: 13 Litres / 3.4 US gal

Consumption Average: 64 mpg

Standing 1/4 Mile: 16.7 sec

Top Speed: 81 mph / 130.3 km/h