2009 Suzuki 400 LTZ Quad Sport Service Manual, Page 265Get this manual
1I-6 Starting System: Commutator Inspect the commutator for discoloration, abnormal wear or undercut "A"If the commutator is abnormally worn, replace the armatureIf the commutator surface is discolored, polish it with #400 sandpaper and wipe it using clean, dry clothIf there is no undercut, scrape out the insulator (1) with saw blade"A"
Starter Relay Removal and Installation
Refer to "Electrical Components Location in Section 0A (Page 0A-7)"
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Removal 1) Turn the ignition switch OFF position2) Remove the seatRefer to "Exterior Parts Removal and Installation in Section 9D (Page 9D-4)"3) Disconnect the battery () lead wire from the battery4) Disconnect the starter relay coupler (1) and remove the starter relay cover (2)1
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Armature coil Measure for continuity between each segmentMeasure for continuity between each segment and the armature shaftIf there is no continuity between the segments or there is continuity between the segments and shaft, replace the armature with new oneSpecial tool (A): 0990025008 (Multi-circuit tester set) Tester knob indication Continuity set)