Honda CB HORNET 160R 2015 Shop Manual page 74

TOOLS
Carburetor float level gauge
070MJ-001-I110
TROUBLESHOOTING
Engine won't start
•
Too much fuel getting to the engine
– Air cleaner clogged
– Flooded carburetor
• Intake air leak
• Fuel contaminated/deteriorated
• No fuel to carburetor
– Fuel strainer clogged
– Fuel hose clogged
– Fuel valve stuck
– Float level faulty
Lean mixture
• Fuel jet clogged
• Float valve faulty
• Float level too low
• Fuel line restricted
• Clogged carburetor air vent hose
• Intake air leak
• Throttle valve faulty
Rich mixture
• SE valve in open position
• Float valve faulty
• Float level too high
• Air jets clogged
• Air cleaner element contaminated
• Flooded carburetor
Engine stall, hard to start, rough idling
• Fuel line restricted
• Ignition system malfunction (page 16-3)
• Fuel mixture too lean/rich (pilot screw adjustment)
• Fuel contaminated/deteriorated
• Intake air leak
• Idle speed misadjusted
• Float level faulty
• Pilot screw misadjusted
After burn when engine braking is used
• Lean mixture in slow circuit
• Faulty PAIR control valve
• Faulty PAIR check valve
• Clogged hose of the secondary air supply system
• Ignition system malfunction (page 16-3)
Backfiring or misfiring during acceleration
• Ignition system malfunction
• Fuel mixture too lean
Poor performance (driveability) and poor fuel economy
• Fuel system clogged
• Ignition system malfunction