Ducati 999 User Manual

82
E
Cleaning and replacing the spark plugs (fig. 78)
Spark plugs are essential to smooth engine running and
should be checked at regular intervals. Spark plugs
condition provides a good measure of engine condition.
Have the spark plugs inspected or replaced at a Ducati
Dealer or Authorized Workshop. Firstly, they will check
the color of the ceramic insulator of the central electrode:
a light brown, even color is a sign of good engine
condition.
Secondly, they will check the central electrode for wear
and measure electrode gap. Electrode gap should be:
0.6-0.7 mm.
Important
An electrode gap outside the specified limit will
adversely affect engine performance and may lead to
difficult starting or erratic idling.
0,6 ÷ 0,7 mm
fig. 78

Ducati 999 Specifications

General

Compression Ratio	11.4:1
Transmission	6-speed
Fuel Tank Capacity	15.5 l (4.1 US gal)
Rear Suspension	Progressive linkage with fully adjustable Showa monoshock
Front Brakes	2 x 320 mm discs, 4-piston calipers
Rear Brakes	240 mm disc, 2-piston caliper
Tire Front	120/70 ZR 17
Tire Rear	190/50 ZR 17
Engine Type	L-Twin cylinder, 4 valves per cylinder Desmodromic
Bore x Stroke	100 mm x 63.5 mm
Power	104 kW (141 hp) @ 9750 rpm
Torque	110 Nm (81.4 lb-ft) @ 8000 rpm
Front Suspension	Showa 43 mm upside-down fork, fully adjustable