2004 Yamaha WaveRunner VX110 Sport and VX110 Deluxe Service Manual, Page 268Get this manual
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STARTER MOTOR
3 Measure: Commutator diameter Below specification ReplaceCommutator diameter: 28.0 mm (1.10 in) Limit: 27.0 mm (1.06 in)
4 Check: Commutator undercut Contaminants Cle