KTM 390 Duke Series 2019 User Manual

26 STANDARDS
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JASO T903 MA2
Different technical development directions required a separate specification for motorcycles – the JASO T903 MA2
standard.
Earlier, engine oils from the automobile industry were used for motorcycles because there was no separate motor-
cycle specification.
Whereas long service intervals are demanded for automobile engines, the focus for motorcycle engines is on high
performance at high engine speeds.
In most motorcycle engines, the transmission and clutch are lubricated with the same oil.
The JASO T903 MA2 standard meets these special requirements.
SAE
The SAE viscosity classes were defined by the Society of Automotive Engineers and are used for classifying oils
according to their viscosity. The viscosity describes only one property of oil and says nothing about quality.

KTM 390 Duke Series 2019 Specifications

General

Displacement	373.2 cc
Bore x Stroke	89 mm x 60 mm
Torque	37 Nm @ 7, 000 rpm
Compression Ratio	12.6:1
Transmission	6-speed
Frame	Steel trellis frame, powder coated
Front Suspension	WP upside-down Ø 43 mm
Rear Suspension	WP monoshock
Front Tire	110/70 R17
Rear Tire	150/60 R17
Wheelbase	1, 357 mm
Seat Height	830 mm
Ground Clearance	170 mm
Fuel Tank Capacity	13.4 liters
Dry Weight	149 kg
Power	32 kW (43.5 hp) @ 9, 000 rpm
Fuel System	Electronic fuel injection (EFI)
Front Brake	320 mm disc brake
Rear Brake	230 mm disc brake
ABS	Bosch 9.1MB two-channel ABS
Engine Type	Single-cylinder, 4-stroke, liquid-cooled
Clutch	Wet multi-disc clutch, mechanically operated