1985-1986 Honda Fourtrax 125 TRX125 Shop Manual, Page 239Get this manual
T ROUBLESHOOTIN G Probable Cause:
POOR PERFORMANCE AT HIGH SPEEDS
, Check ignition timing and valve
clearance
INCORRECT- -_ (1) Improper valve clearance
(2) Faulty COl unit (3) Faulty pulse generator (4) Faulty pulse rotor
CORRECT
2Disconnect fuel tube at carburetorFUEL FLOWS FREELY
FUEL FLOW RESTRtCTED-
3Remove carburetor and check for
a clogged jetNO CLOGS
Lack of Clogged Clogged Clogged
fuel fuel fuel fuel
in tank line tank breather hole valve
CLOGGED