1986-1987 Honda Fortrax TRX70 Service Manual, Page 149Get this manual
TROUBLESHOOTING
POOR PERFORMANCE AT HIGH SPEEDS
1, Check Ignition timing and valve ctear- lNCORRECT'- -(1)anee (2) (3) (4) CORRECT Improper valve clearance FaultY COl unit Faulty puisgenerator Improper flywheel installation
2Check if fuel is getting to carburetor
FUEL FLOWS FREELY
FUEL FLOW RESTRICTEDf(1) Lack of fuel in tank t21 fuel line or fuel strainer (3) Clogged fuel tank cap breather
hoi14) Clogged fuel valve
ALov,buto nd
check for clogged jet
NOT CLOGGED
4CiCk valve riming
6Check valve spring tension