Engine start and battery charging system of motorcycle Ducati ST2 (1997-2003)

Removing the battery
Unscrew the screw (1) and remove the upper fixing bracket. Disconnect the breather tube (2). Disconnect the BLACK negative (A) first and then the RED positive terminal (B). ALWAYS DISCONNECT THE BATTERY CABLES IN THIS ORDER. Remove the battery from...

Removing the battery support
Remove the cap (C) and unscrew the nut and spring washer for the starter motor-contactor cable. Remove the starter motor cable and disconnect it from the battery support. When refitting the starter motor cable, fill the cap (C) with protective...

Disassembly alternator
Secure the generator rotor with service tool 88713.0710 and remove the nut (1). Remove the following: the Belleville washer (2); the outer spacer (3); the generator rotor (4); the key; the inner spacer (5). Note. This operation may be difficult,...

Disassembly starter idling gear and starter engine
Remove the timing system control gear and the key. Remove the stop ring for securing the starter idling gear unit. Remove the starter idling gear unit and its shims. Unscrew the retaining screws and extract the starter engine and its gasket.

Charging a new battery
The new battery is supplied empty, with dry charge. It must therefore be removed from its housing and charged. Proceed as follows: Remove the lower right fairing as described in " Removing the lower fairings " in the section " Frame ". Undo the...

Recharging the battery
If the motorcycle is not used, the battery loses as much as 1% of its charge a day in hot climates (see graph). Under these conditions, the battery should be recharged at least once a month. If the battery charge is too low, it may not accept a high...

Generator — general information
The generator is a 12V, 420W alternator, consisting of a stator (A) located in the left-hand side engine cover and a rotor (B) fixed to the crankshaft. Note. To check the recharging system for faults, use the "MATHESIS" tester.

Rectifier regulator — general information
The rectifier regulator is located beneath the right-hand bracket of the headlight; the bracket also acts as a heat sink for the regulator. At reassembly, apply a heat conductive paste to the contact surface of the headlight bracket in order to...

Starter motor — general information
Power: 0.7 HP/12 V Direction of rotation: anti-clockwise from the power side. Thanks to its reliability and compact design, the starter motor does not usually present any problems. In the event of a fault, contact a specialised motor vehicle...

Checking the components of starter contactor
Remove the starter contactor from its housing and disconnect the main cable connector. Apply a voltage of 12V (battery) across the two exposed terminals. Connect a tester across the two, terminals (threaded pins) of the contactor and check that it...