Ducati 48/1 & 50/1 Brisk

Ducati 48/1& 50/1 Brisk

Make Model	Ducati 48/1 & 50/1 Brisk
Year	48/1: 1961 - 66 50/1: 1967
Engine	Two-stroke, single cylinder, piston port
Capacity	47.6 cc / 2.9 cu in
Bore x Stroke	38 x 42 mm
Compression Ratio	6.3:1 (from 1963: 7:1)
Cooling System	Air cooled
Induction	Dell'Orto T4 12D1
Spark Plug	Marelli CW 225N
Ignition	6V 18W flywheel magneto
Starting	Kick
Max Power	1.0 kW / 1.34 hp @ 4200 rpm (from 1963: 1.1 kW / 1.5 hp @ 5200 rpm)
Clutch	Wet, multiplate
Transmission	Single speed
Final Drive	Chain
Frame	Pressed steel
Front Suspension	Telescopic fork
Rear Suspension	Swingarm, dual shocks
Front Brakes	Drum, 90 mm
Rear Brakes	Drum, 90 mm
Front Wheel	2.00 x 18
Rear Wheel	2.00 x 18
Dry Weight	48/1: 45 kg / 99 lbs 50/1: 50 kg / 110 lbs
Top Speed	40 km/h / 25 mph

The 48cc Brisk was introduced in 1961 and was sold (mainly in the domestic market) until 1965. It had but a single speed and the 2-stroke engine put out 1.3hp at 4,250rpm giving the 40kg bike a top speed of 40kph. The tubular frame was replaced by a pressed steel design in 1962.

In 1967 the Brisk 50/1 was introduced (as seen here). Changes were mostly cosmetic with a rectangular tank, angular front mudguard and a small square-bodied headlight. A single or dual seat was available.

Text and Photos: Phil Aynsley