Gilera 633721 Workshop Manual page 121

Nexus 500 euro 3
Engine
80 - 120 A
Revolution speed =
approx. 300-400 rpm
YES go to 6 NO go to 7 NO go to 8 NO go to 9
5 - Restore the connections
6- The values are correct.
Finally carry out a check of the power consumption at idle speed.
Remove the starter motor (see the flywheel and starter system).
Reconnect the earth and positive and perform the test.
Electric characteristic
Current consumption at idle speed:
<40 A
YES go to 10 NO go to 11
7- Low trailing speed
High electrical absorption
Carry out a test of the engine rotation (example: possible melting of the bushes) and if no anomalies
are found, replace the starter motor.
8- Low trailing speed
Low electrical absorption
Repeat the test, bridging the power terminals of the starter remote control switch or even better replacing
them.
Check the new values.
YES go to 12 NO go to 13
9 - High trailing speed
Low electrical absorption
The engine turns too freely, check the compression end pressure.
If the values are not correct proceed as follows.
10 - The starter motor works properly.
11 - Check the rotation of the armature.
12 - Replace the starter remote control switch.
13 - Test the battery again and if necessary replace the starter motor.
ENG - 121