The following data is taken from official Ducati information and is intended for general reference MY02 Ducati 748 technical info 4-stroke 90 ° L twin-cylinder. Bore: 88 mm Stroke: 61.5 mm Capacity, cu. cm: 748 Compression ratio: 1:11.5 ±0.5 Max. power at crankshaft (95/1/EC), kW/HP: 72/97 at rpm: 11,000 Max. crankshaft torque (95/1/EC) 74 Nm at 9,000 rpm Max. engine speed: 11,500 rpm Valves Intake valve diameter: 33 mm Exhaust valve diameter: 29 mm Timing Data measured with 1 mm clearance and timing belts tensioned with service tool part no. 88765.0999 (set for 4V engines) at 11.5 . Intake valve opens at: 11° before TDC. Intake valve closes at: 70° after BDC. Exhaust valve opens at: 62° before BDC. Exhaust valve closes at: 18° after TDC. Valve lift Data measured with 0 mm clearance. Intake, mm: 9.6 Exhaust, mm: 8.74 Tappet clearances (with engine cold) Mounting values: Opening rocker arm Intake: 0.13 - 0.18 mm Exhaust: 0.18 - 0.23 mm Closing rocker arm Intake: 0.13 - 0.18 mm Exhaust: 0.08 - 0.13 mm Check values: Opening rocker arm Intake: 0.05 - 0.18 mm Exhaust: 0.05 - 0.23 mm Closing rocker arm Intake: 0.13 - 0.25 mm Exhaust: 0.08 - 0.20 mm SPARK PLUGS Make: CHAMPION Type: RA 59 GC or equivalent FUEL SYSTEM - IGNITION Electronic indirect fuel injection with one injector per cylinder. Inductive discharge electronic ignition. Make: MARELLI Type: I.A.W. 1.6 M This is an integrated ignition and sequential timed fuel injection control unit. Ignition and fuel injection are controlled by the injectors which switch between two steady states: Open : injector feeds fuel. Closed : injector does not feed fuel. The control unit meters out the amount of fuel fed to the injectors and controls the injector opening times. Ignition is controlled by an inductive discharge system consisting of two coils (one per cylinder) and power modules incorporated into the control unit. The I.A.W control system reads the engine status from a series of inputs from sensors on the engine. Each sensor supplies the control unit with a specific item of information necessary to build up a complete picture of the current engine operating status. The engine sensor provides a signal used to calculate the engine speed and the correct timing at TDC. The throttle position sensor signal indicates the throttle opening angles. The absolute pressure sensor signal indicates the ambient barometric pressure. The water temperature sensor signal indicates the current engine operating temperature. The air temperature sensor indicates temperature of the air at the engine air intake. The control system uses the “Alfa/ N” control strategy to optimise engine operation. The “Alfa/N” control strategy uses the throttle angle (Alfa) and engine speed (N) parameters to control fuel injection and ignition. The control unit memory contains software tables showing the injection pulse duration, injection timing and ignition timing values corresponding to a particular engine speed and throttle opening. The other system inputs (water temperature, air temperature, pressure and battery voltage) modify the correction factors applied to the values in the “Alfa/N” tables. The system applies other correction factors in situations (such as starting, sudden opening and closing of the throttle) where special ignition or injection methods are required. COOLING SYSTEM Liquid cooled. Pressurised cooling circuit with radiator and mixing thermostat. Coolant is circulated by centrifugal pump driven by the camshaft. The circuit has an expansion tank to take up coolant when it expands from heat. Pump flow rate: 2.6 lt/min. every 1,000 rpm. Thermostat Opening start: 65 °C ±2 °C Electric fan switches on: 92 °C Electric fan switches off: 87 °C TRANSMISSION Dry, multi-plate clutch: 8 driven plates, (7 flat, 1 spring plate) + 7 drive plates with 14 friction surfaces; 6 pressure coil springs. Clutch is hydraulically controlled from a lever on the LH handlebar. Clutch master cylinder: BREMBO, PSC 13 Primary drive between gearbox and engine by spur gears. Selector drum and fork gear selector system. A lever linkage controls selector drum rotation. 6-speed gearbox. Primary front/rear sprocket ratio 31/62 Drive ratio: 2 Front/rear chain sprocket ratio 14/38 Final drive ratio 2.71 Gear ratios 1st 15/37 13.39 2nd 17/30 9.54 3rd 20/28 7.59 4th 22/26 6.40 5th 23/24 5.64 6th 24/23 5.2 Final drive from gearbox to rear wheel by chain: Make: DID Type: 520 V L4 Dimensions (pitch x inside width between side plates): 5/8" (15.875 mm) x 1/4" ( 6.35 mm) No. of links: 94 BRAKES Front Drilled semi-floating twin steel disc with aluminium flange and steel pawls. Disc diameter: 320 mm Disc thickness (748): 4 mm Disc thickness (748S): 5 mm Front brake hydraulically controlled from lever on RH handlebar. Braking area: 88 sq. cm Brake calliper with differential pistons. Make: BREMBO Type: 30/34 - 4 pistons Master cylinder: PSC 16 Pad friction material: FERIT I/D 450 FF Rear Fixed drilled steel disc Disc diameter: 220 mm Disc thickness: 6 mm hydraulically controlled from brake pedal on RH side. Braking area: 25 sq. cm Make: BREMBO Type: P2.I05N Master Cylinder: PS 11 Pad friction material: FERIT I/D 450 FF FRAME Tubular trellis frame with upper cage made from ALS 450 high tensile steel. 748 steering angle: ● Steering angle: 24° 30' ● Rake: 97 mm 748S steering angle, track use. ● Steering angle: 23° 30' ● Rake: 91 mm 748 S steering angle, road use. ● Steering angle: 24° 30' ● Rake: 97 mm SUSPENSION Front Hydraulic upside-down fork with compression and rebound adjustment and pre-load adjustment of springs inside fork legs. Stanchion diameter: 43 mm Travel along leg axis: 127 mm Rear Progressive suspension with rocker connecting frame and top pivot point of rear shock absorber. Shock absorber features compression, rebound and spring preload adjustment and is hinged on a light alloy single-sided swinging arm at the bottom end. The swinging arm pivots on a pivot shaft passing through frame and engine. This system ensures exceptional stability. Stroke: 71 mm Rear wheel travel: 130 mm WHEELS Light-alloy wheel rims: 748: three-spoke rims. 748S: five-spoke rims. Size Front: 3.50x17" Rear: 5.50x17" The front wheel shaft is removable. The rear wheel (cantilevered) is secured to rear sprocket hub by means of a nut and circlip. This system ensures fast replacement TYRES Construction Radial, tubeless Size Front: 120/60-ZR17 Rear: 180/55-ZR17 Tyre Bar pressure (cold) Front: 2.1 to 2.3 (32psi) Rear: 2.2 to 2.4 (34psi) With rider + passenger Front: 2.35 to 2.4 Rear: 2.74 to 2.8 ELECTRIC SYSTEM Main components: Front headlamp assembly consisting of: 12V-55W poly-ellipsoidal low beam unit with capacitor; 12V-60W high beam unit. Parking light with two 12V-5W bulbs. The low beam unit remains on when the high beam unit is switched on; total lighting power is thus the total for the two light units. Instrument panel, 12V-1.2W warning lights; 12V-2W instrument lights. Electrical controls on handlebars. Direction indicators, 12V-10W bulbs. Horn. Stop light switches. Battery 12V-10 Ah. Three-phase DENSO alternator, 12V-520W. Electronic voltage regulator, with 40 A fuse, cuts at 14.5 V maximum, system voltage 12 V. NIPPODENSO starter motor , 12V0.7 kW . Rear light, 12V-5/21W twin filament bulb for stop light and side light; 12V-5W bulb for number plate light. AVAILABLE COLORS (748) • Ducati Anniversary Red 473.101 (PPG) • Ducati Yellow 473.201 (PPG). AVAILABLE COLORS (748S)• Iron grey 291.600 (PPG) • Ducati Anniversary Red 473.101 (PPG) • Ducati Yellow 473.201 (PPG). WEIGHT Dry weight, Kg: 196 Full load, Kg: 375 (Biposto); 310 (Monoposto). Fuel and lubricants Fuel tank inc 4L reserve 95-98 RON 17L Engine sump and oil filter (Shell Advance Ultra 10-40 or Equiv) 3.5L Front fork leg 7.5W Fork oil 0.480 (per leg) Coolant 3.5L Antifreeze(nitride, amine and phosphate free) 35 - 40 % in water solution . Brakes hydraulic fluid DOT4
