1987 Honda Fourtrax TRX 250X Service Manual, Page 217Get this manual
ELECTRICAL SYSTEM If there is no problem, inspect the following circuits; replace or repair them if necessary- alternator lighting coillpage 65)- AC regulator (page 16-5)If there is no problem with all the above checks, replace the COl unitIf there is indication of abnormality, inspect the related circuit as follows; replace or repair them if necessary- ignition coil primary coil (page 16-4)- ignition coil secondary coil (page t6AI- pulse generator (page 165)- alternator exiter coil (page 651- ignition switch (page 16-8)