Ducati 350 Mark 3D

Ducati 350 Mark 3
Manufacturer	Ducati
Also called	350 Mark 3D, 350 Mark 3 D
Production	1971 - 75
Engine	Four stroke, single cylinder, SOHC, bevel gear driven
Compression ratio	10.0:1
Top Speed	170 km/h / 106 mph
Ignition	Points, coil, 6V30W generator
Spark Plug	Marelli CW260N / Lodge 2HN
Battery	Yuasa B38 12Ah
Transmission	5 Speed
Suspension	Front: 35 mm Marzocchi telescopic hydraulic fork Rear: Swingarm, Twin Marzocchi shocks, 3-way adjustable
Brakes	Front: 180 mm Drum Rear: 160 mm Drum
Front Tire	2.75-18
Rear Tire	3.00-18
Seat Height	735 mm / 28.9 in
Weight	128 kg / 282 lbs (dry),
Fuel Capacity	15 Liters / 4.0 US gal / 3.3 Imp gal
Manuals	Service Manual

It could reach a top speed of 170 km/h / 106 mph.

Engine

The engine featured a 10.0:1 compression ratio.

Drive

Power was moderated via the Wet, multiplate.

Chassis

It came with a 2.75-18 front tire and a 3.00-18 rear tire. Stopping was achieved via 180 mm Drum in the front and a 160 mm Drum in the rear. The front suspension was a 35 mm Marzocchi telescopic hydraulic fork while the rear was equipped with a Swingarm, Twin Marzocchi shocks, 3-way adjustable. The 350 Mark 3D was fitted with a 15 Liters / 4.0 US gal / 3.3 Imp gal fuel tank. The bike weighed just 128 kg / 282 lbs.

Photos

Overview

Ducati 350 Mark 3

Desmodromic Emerges

The narrow case Ducati single cylinders were selling well and known worldwide through out the decade. Later in the decade when Ducati introduced the wide-case production models they represented the pinnacle of Ducati singles for the times. A single camshaft that was driven by bevel gears characterized the wide-case Ducati motorcycles.

As a direct descendent of the narrow-case family, the Ducati 250cc and 350cc versions of the wide-case models were first produced in the spring of 1968. The Ducati 450cc was added in the following year. The performance and elegant mechanics of the motorcycles immediately caught the attention of motorcycle enthusiasts worldwide.

Perhaps the most famous wide-case Ducati was the Scrambler. The Ducati Scrambler motorcycle sold tens of thousands around the world, leading to its legendary status. The fast and agile Ducati Mark 3 sports model was soon joined by the Ducati Mark 3D - the first Ducati with the now famous Desmodromic valve gear on a production model.

The word ‘Desmodromic' is not actually derived from Italian but rather from two Greek roots, desmos (meaning - linked) and dromos (meaning - track). The Ducati Desmodromic system is unique in that the valves are positively closed and opened by a cam and leverage system, rather than relying on standard valve springs. The same basic Desmodromic layout continues to win world championships today and is deeply seated in the Ducati Brand identify.

Make Model	Ducati 350 Mark 3
Year	1971 - 75
Engine Type	Four stroke, single cylinder, SOHC, bevel gear driven
Displacement	340.2cc / 20.8 cu in
Bore X Stroke	76 x 75 mm
Compression	10.0:1
Induction	Dell'Orto SS129D
Ignition	Points, coil, 6V30W generator
Battery	Yuasa B38 12Ah
Spark Plug	Marelli CW260N / Lodge 2HN
Starting	Kick
Max Power	24.8 kW / 34 hp @ 8500 rpm
Clutch	Wet, multiplate
Primary Drive Ratio	2.111:1
Transmission	5 Speed
Gear Ratios	1st 2.46 / 2nd 1.73 / 3rd 1.35 / 4th 1.10 / 5th 0.97:1
Final Drive	Chain
Final Drive Ratio	3.214:1
Front Suspension	35 mm Marzocchi telescopic hydraulic fork
Rear Suspension	Swingarm, Twin Marzocchi shocks, 3-way adjustable
Front Brakes	180 mm Drum
Rear Brakes	160 mm Drum
Front Tire	2.75-18
Rear Tire	3.00-18
Dimensions	Length: 2000 mm / 78.7 in Width: 600 mm / 23.6 in Height: 940 mm / 37.0 in
Seat Height	735 mm / 28.9 in
Dry Weight	128 kg / 282 lbs
Fuel Capacity	15 Liters / 4.0 US gal / 3.3 Imp gal
Top Speed	170 km/h / 106 mph