Troubleshooting Contents; Engine Does Not Start Or Is Hard To Start - Honda CB HORNET 160R 2015 Shop Manual

ENGINE DOES NOT START OR
IS HARD TO START
ENGINE LACKS POWER
POOR PERFORMANCE AT LOW AND
IDLE SPEED

ENGINE DOES NOT START OR IS HARD TO START

1. Fuel Line Inspection
Check fuel flow to carburetor.
Does fuel reach the carburetor?
– Faulty fuel system.
NO
– GO TO STEP 2.
YES
2. Spark Plug Inspection
Remove and inspect the spark plug.
Is the spark plug wet?
– • Flooded carburetor
YES
• Throttle valve open
• Dirty air cleaner
• Improperly adjusted pilot screw
NO – GO TO STEP 3.
3. Spark Test
Perform spark test.
Is there weak or no spark?
– • Faulty spark plug
YES
• Loose or disconnected ignition system wires
• Broken or shorted spark plug wire
• Faulty ignition coil
• Faulty ignition pulse generator
• Faulty ignition switch
• Faulty CDI
• Faulty regulator, rectifier Assembly
• Shorted battery wire
– GO TO STEP 4.
NO
4. Engine Starting Condition
Start by following normal procedure.
Does the engine start then stops?
– • Improper choke operation
YES
• Incorrectly adjusted carburetor
• Leaking carburetor insulator
• Improper ignition timing (Faulty CDI or ignition pulse generator)
• Contaminated fuel
– GO TO STEP 5.
NO
5. Cylinder Compression Inspection
Test cylinder compression.
Is the compression low?
– • Valve clearance too small
YES
• Valve stuck open
• Worn cylinder and piston rings
• Leaking/damaged cylinder head gasket
• Seized valve
• Improper valve timing
• Loose spark plug
• Carbon deposition on valves
20. TROUBLESHOOTING
20-1
20-2
20-4
.
POOR PERFORMANCE AT HIGH SPEED
POOR HANDLING
20-5
20-5
20
20-1