Gilera 633721 Workshop Manual page 120

Engine
N.B.
- THE INTERMEDIATE BOLTS FOR THE REMAINING
MOUNTING POINTS WITH THE EXCEPTION OF THE BOLT
FOR THE MANIFOLD SUPPORT (SHOWN IN THE FIGURE)
ARE SLIGHTLY LONGER.
Locking torques (N*m)
Flywheel cover screws
Flywheel and starting
The starter is sold as a complete part.
Before deciding to replace it, carry out the follow-
ing tests:
1 - Battery
Check the voltage after not running (a few hours):
Voltage >12.5V
Check the density of the electrolyte of each cell:
Bé = 30 ÷ 32
Specific weight: 1.25 - 1.26
YES go to 2 NO go to 3
2 - Make sure the negative terminals (battery neg-
ative and starter negative) are correctly connected
to each other and to the frame.
YES go to 4 NO go to 5
3 - Recharge and if necessary replace the battery.
4 - Connect the diagnostic tester (see chapter "Injection system").
Connect the induction clamp of an ammeter to the positive power supply cable of the starter motor.
Remove the 10A fuse no. 12 (see "fuses" chapter).
Switch in position "ON" with interrupt switch in position "RUN" and side stand raised.
Select the "PARAMETERS" function.
Start the engine (so that it cannot move) long enough to measure the rpm and starter absorption.
N.B.
THE DECLARED RPM VALUE IS THAT INDICATED BY THE TESTER, THE RPM READING IS NOT
THE REAL ONE, BUT IS VALID FOR DIAGNOSTIC PURPOSES.
Specific tooling
020460Y Scooter diagnosis and tester
Electric characteristic
Absorption at trailing speed:
ENG - 120
11 - 13
Nexus 500 euro 3