Duke 390

Engine

Design	1-cylinder, 4-stroke, water-cooled
Displacement	373.2 cm
Bore	89 mm
Stroke	60 mm
Performance	32 kW (44 hp)
Starting aid	Electric starter
Transmission	6-speed, claw shifted
Engine lubrication	Forced oil lubrication with 2 Eaton pumps
Primary gear ratio	30:80
Secondary gear ratio	14:45
Cooling system	Liquid cooling system, continuous circulation of cooling liquid with water pump
Clutch	Wet multi-disc clutch/hydraulically operated
Ignition system	Contactless, controlled, fully electronic ignition system with digital ignition timing adjustment

Chassis

Frame	Tubular space frame made from chrome molybdenum steel, powder-coated
Fork	WP Suspension Up Side Down
Shock absorber	WP Suspension Monoshock
Suspension travel Front	150 mm
Suspension travel Rear	150 mm
Brake system Front	Disc brake with four-pot brake caliper
Brake system Rear	Disc brake with one-pot brake caliper, floating brake discs
Brake discs - diameter front	300 mm
Brake discs - diameter rear	230 mm
Chain	5/8 x 1/4" (520) X-Ring
Steering head angle	65 °
Wheel base	1,367 ± 15 mm
Ground clearance (unloaded)	170 mm
Seat height (unloaded)	800 mm
Total fuel tank capacity approx.	11 l Unleaded premium fuel (95 RON)
Weight without fuel approx.	139 kg