Honda Hawk GT NT650 1988 Service Manual page 55

FUEl SYSTEM
TORQUE VALUES
Fuel tank mounting bolt
TOOLS
Special
Vacuum/Pressure pump
Pressure pump
Vacuum pump
Common
Float level gauge
: Front
: Rear
12 N'm (1.2 kg-m. 9 ft-Ib)
22 N'm (2.2 kg-m. 16 ft-Ib)
A937X-041-XXXXX or
ST -AH-255-MC7 (U.S.A. only)
ST -AH-260-MC7 (U.S.A. only)
07401-0010000
TROUBLESHOOTING
Engine cranks but won't start
No fuel to carburetor
Engine flooded with fuel
No spark at plug (ignition system faulty)
Clogged air cleaner
Intake air leak
Improper choke operation
Improper throttle operation
Hard starting or stalling after starting
Improper choke operation
Ignition malfunction
Faulty carburetor
Fuel contaminated
Intake air leak
Incorrect idle speed
Incorrect valve clearance (Section 3)
Incorrect carburetor synchronization (Section 3)
Improper choke valve operation. •
Rough idle
Faulty ignition system
Incorrect idle speed
Incorrect valve clearance (Section 3)
Incorrect carburetor synchronization
Faulty carburetor
Fuel contaminated
Faulty air cut off valve
(California model only:)
: Faulty purge control valve
: Faulty air vent control valve
: Worn/damaged emission system hoses
Afterburning during deceleration
Faulty ignition system
Faulty air cut off valve
Lean mixture
(California model only:)
: Worn/damaged emission system hoses
4-2
Misfiring during acceleration
• Faulty ignition system
Backfiring
Faulty ignition system
• Faulty carburetor
Poor performance ldriveability) and poor fuel economy
• Clogged fuel system
Faulty ignition system
Dirty air cleaner
(California model only:)
: Faulty air vent control valve
: Worn/damaged emission system hoses
Lean mixture
Clogged fuel jets
Stuck vacuum piston
Faulty float valve
Low float level
Clogged fuel tank breather
Clogged fuel strainer
Restricted fuel line
Intake air leak
Restricted or faulty fuel pump
Rich mixture
Clogged air jets
Faulty float valve
Float level too high
Dirty air cleaner