Honda Hawk GT NT650 1988 Service Manual page 249

TROUBLESHOOTING
POSSIBLE CAUSE
B E T T E R - - - - - - - - - - - -......• Clogged air passages
Clogged jets
VALVE SURGING--------_ .. • Improper valve clearance (too small)
Weak valve spring
ABNORMAL - - - - - - - - - - _ . .• Improper ignition timing
(Faulty pulse rotor or generator with
ferrous burrs)
[Continued)
6 Ch
I
k
. .. . . . . .
. ec Ignition timing uSing timing
light
7. ChJk valve train
I
NO PROBLEM
8. Cle:n the carburetors: air passages
and ~ets
DOES NOT IMPROVE
1-1- - - - - - - - - - - - - - - - - - - - - - - - - - - - _ . . . Seized cylinder and piston
Seized connecting rod bearing
Damaged main bearing
20-4