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ROYAL ENFIELD VEHICLE SERVICE MANUAL - EURO IV
268
INSPECTION
A) PHASE TO PHASE RESISTANCE CHECK
1. Phase to phase resistance of the magneto shall be checked by setting multimeter in resistance mode.
2. Phase to Phase resistance – 0.59 to 0.72
3. If the resistance deviates from the spec, then cover shall be opened and checked if stator coil has burnt. If stator
coil is burnt then replace the magneto.
If multimeter shows open during resistance check, the coil has got cut or short with the core and magneto has to be
replaced.
B) INSULATION TEST
1. For checking the insulation strength, keep the multimeter in continuity mode and check continuity between
any 3 phase terminals and engine body. If there is a body short(insulation failure), multimeter will indicate 0ohms
(or resistance value ~ 50 ohms) with a beep sound.
If insulation failure is observed, failed magneto to be replaced with new magneto.
2. During visual inspection, if stator coil has burnt, magneto shall be replaced with new magneto.
FLYWHEEL MAGNETO
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