1985-1987 Honda TRX 250 Fourtrax 250 Service Manual, Page 220Get this manual
STARTER SYSTEM FIELD COIL IN SPECTION Check for continuity from the cable terminal to the motor case and from the cable terminal to the brush wireReplace the starter motor if the field coil is not continuous or if it is shorted
to the motor case
ASSEMBLY IINSTAL LATION
Assemble the starter motorAlign the case notch with the brush holder pin