Honda CB HORNET 160R 2015, Shop Manual

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20-1
20. TROUBLESHOOTING
20
ENGINE DOES NOT START OR
IS HARD TO START
20-1
ENGINE LACKS POWER 20-2
POOR PERFORMANCE AT LOW AND
IDLE SPEED
20-4
POOR PERFORMANCE AT HIGH SPEED 20-5
POOR HANDLING 20-5
ENGINE DOES NOT START OR IS HARD TO START
1. Fuel Line Inspection
Check fuel flow to carburetor.
.
Does fuel reach the carburetor?
NO
– Faulty fuel system.
YES
– GO TO STEP 2.
2. Spark Plug Inspection
Remove and inspect the spark plug.
Is the spark plug wet?
YES – •
Flooded carburetor
• 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?
YES –
• Faulty spark plug
• 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
NO –
GO TO STEP 4.
4. Engine Starting Condition
Start by following normal procedure.
Does the engine start then stops?
YES –
• Improper choke operation
• Incorrectly adjusted carburetor
• Leaking carburetor insulator
• Improper ignition timing (Faulty CDI or ignition pulse generator)
• Contaminated fuel
NO –
GO TO STEP 5.
5. Cylinder Compression Inspection
Test cylinder compression.
Is the compression low?
YES –
• Valve clearance too small
• 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