2005-2008 Honda ATV TRX500FA/FGA Fourtrax, Rubicon Factory Service Manual, Page 433Get this manual
ELECTRIC STARTER Remove the following: nut washer insulator washers brush holder assembly O-ring insulator NUT O-RING
INSULATOR WASHERS
BRUSH HOLDER
WASHER Remove the brushes from the brush holderMeasure the brush lengthSERVICE LIMIT: 9.0 mm (0.35 in)