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Manuale di Officina RR 4T - 400 - 450 - 525
Ignition system
General information
The measurements described below are only used to find
easily detectable faults. Inside short circuits, which pro-
duce feeble sparks with a low ignition power, can only be
discovered with a specially designed ignition test bench.
In case of problems first check the wires and connectors
of the ignition system.
When taking a measurement, be sure to use a suitable
measuring range. The CDI unit can only be checked on a
specially designed ignition test bench.
Checking the stator and the pick-up
Using an ohmmeter, take the following measurements:
NOTE: The following measurements correspond to the
nominal values only at a temperature of 20° C. If the
measured values differ considerably from the nominal va-
lues, replace the stator.
Replacing the stator
– Loosen screw 4 and remove the fixing plate.
– Unscrew the two screws 5 and remove the stator from the
ignition cover.
– Position the new stator in the ignition cover. Degrease the th-
reads of the three screws and then apply Loctite 243 to them.
– Fit the screws and tighten them to 8 N·m.
– Arrange the wires without stretching them and then fasten
them with the fixing plate.
Acc. Measurement Colour Resistance
Pick-up red – green 100 Ω ± 20%
4K-3B Stator black/red – red/white 12,6 Ω ± 20%
Charged coil ground – yellow 0,65 Ω ± 20%
bianco – yellow 0,16 Ω ± 20%
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