2004-2009 Honda TRX450R/TRX450ER Service Manual, Page 488Get this manual
ELECTRIC STARTER (TRX450ER) Check the bushing in the rear cover for wear or damageBUSHING
Check for continuity between the insulated brush and cable terminalThere should be continuity
CONTINUITY:
INSULATED BRUSH Check for continuity between the cable terminal and rear coverThere should be no continuity