2001-2006 Honda TRX 300EX Sportrax 300EX Factory Service Manual, Page 305Get this manual
ELECTRIC STARTER Disconnecllhe reverse inhibiter unit connectors, check for each switch line for continuity:Continuity ith the clutch lever pulled in- Continuity with the transmission in neulral- No-conlinuily with the tran smission in reverse If there is continuityreplace the reve se inhibiter unit