Ducati 999S 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 999S Specifications

General

Displacement	998 cc
Transmission	6-speed
Rear Brakes	Single 240 mm disc, 2-piston caliper
Bore x Stroke	100 mm x 63.5 mm
Frame	Tubular steel trellis
Engine Type	L-twin, 4 valves per cylinder, Desmodromic
Front Suspension	Showa 43 mm fully adjustable upside-down fork
Rear Suspension	Fully adjustable Ohlins monoshock
Front Brakes	2 x 320 mm discs, 4-piston calipers
Fuel Capacity	15.5 liters
Fuel Injection	Marelli electronic fuel injection
Exhaust	2-1-2 system with catalytic converter
Torque	106 Nm @ 8, 000 rpm