Stator Check; Voltage Regulator Check - PIAGGIO MSS Fly 50 4T Workshop Manual

Electrical system

Stator check

- Using a tester, check the resistance between the
brown-earth and black-earth terminal.
N.B.
VALUES ARE STATED AT AMBIENT TEMPERATURE. A
CHECK WITH THE STATOR AT OPERATING TEMPERA-
TURE LEADS TO VALUES HIGHER THAN THOSE STATED.
Electric characteristic
Stator : Brown-earth
approx. 170 Ω (Pick-Up)
Stator : Black-earth
~ 1 Ω (Stator)

Voltage regulator check

A malfunction in the voltage regulator might cause the following problems depending on the type of
fault:
1) Bulbs burned out (regulator in short circuit).
2) Malfunction of the lighting system and the electric starter (regulator interrupted).
3) Battery not recharging.
4) Turn indicators not working.
The regulator is earthed through the electrical system, so the regulator body does not earth the circuits
inside the regulator.
There must be insulation between each regulator terminal and the regulator body (use the tester to
check electric resistance).
1) BURSTING LIGHT BULBS
Replace the voltage regulator as this is definitely
faulty.
2) HEADLIGHTS AND CHOKE NOT-OPERA-
TIONAL
In order to leave the AC free from absorptions, so
to carry out voltage checks, please proceed as fol-
lows. Remove the handlebar covers. Detach the
connections from the headlight and the 5 PIN con-
nector from the dashboard. Remove the taillight
bulb. Remove the automatic choke connector from
the system.
Access the voltage regulator, start the engine and
let it run at idle.
ELE SYS - 54
MSS Fly 50 4T