Ducati ST4

Ducati ST4

year icon
Model year
1999
make icon
Make
Ducati
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Engine Power
104.69 HP (77 kW) @ 8500 rpm
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Top Speed
149.13 mph

Technical Specifications

Engine and transmission

  • Engine type:
    2 cylinders, 4-stroke, 90° V-twin
  • Displacement:
    916 cc (55.97 cubic inches)
  • Bore × stroke:
    3.7 inch × 2.6 inch (oversquare - shortstroke)
  • Cooling system:
    Water cooled
  • Power:
    104.69 HP (77 kW) @ 8500 rpm
  • Torque:
    89 Nm (65.64 lb-ft) @ 7500 rpm
  • Throttle:
    Cable operated
  • Valve train:
    SOHC, variable
  • Valves per cylinder:
    4
  • Sparks per cylinder:
    1
  • Fuel supply system:
    Fuel injection
  • Ignition type:
    Digital CDI
  • Compression:
    11:1
  • Engine mounting:
    Transverse
  • Lubrication system:
    Wet sump
  • Gear box:
    Manual 6-speed
  • Clutch:
    Wet, multiple discs, cable operated
  • Final drive:
    Chain
  • Spark plug pipe type:
    Champion, RA59GL
  • Motor oil:
    Synthetic, 20W/50
  • Starter:
    Electric

Dimensions

  • Length:
    81.5 inch
  • Height:
    46.5 inch
  • Wheel base:
    56.3 inch
  • Seat height:
    32.3 inch
  • Curb weight:
    513.7 lbs
  • Dry weight:
    445.3 lbs

Chassis and suspension

  • Front
    Suspension:
    Cartridge - upside-down
    Suspension travel:
    5.12 inch
    Fork angle:
    24°
    Brake:
    Twin Disk, Ø12.6 inch
    Tire:
    120 / 70 R17 ZR
    Tire pressure:
    0.14 PSI, with pillion: 0.17 PSI withpilion
  • Rear
    Suspension:
    mono shock, Swingarm
    Suspension travel:
    5.83 inch
    Brake:
    Disk, Ø9.65 inch
    Tire:
    180 / 55 R17 ZR
    Tire pressure:
    0.16 PSI, with pillion: 0.19 PSI withpilion
  • Frame type:
    steel, Trellis frame

Other

  • ABS available:
    No
  • Power-to-weight ratio:
    0.33 KW/lbs (3.03 lbs/HP)
  • Top speed:
    149.13 mph
  • Fuel capacity:
    5.55 gals
  • Number of riders:
    2 persons

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