Poor Performance At High Speed - Honda CBR125R Owner's Manual

TROUBLESHOOTING

POOR PERFORMANCE AT HIGH SPEED

1. Ignition Timing Inspection
Check the ignition timing.
Is the ignition timing as specified?
NO
YES
2. Fuel Pump Inspection
Inspect the fuel flow.
In the fuel pump unit operation normal?
NO
YES
3. PGM-FI System Inspection
Check the PGM-FI system.
Is the PGM-FI system normal?
NO
YES
4. Valve Timing Inspection
Check the valve timing.
Is the valve timing correct?
NO
YES
5. Valve Spring Inspection
Check valve springs.
Is the valve spring free length as specified?
NO
YES
6. Camshaft Inspection
Remove and inspect the camshaft.
Is the cam lobe height as specified?
NO
YES
21-6
– • Faulty ECM
• Faulty CKP sensor
• Improper valve timing
– GO TO STEP 2.
– Faulty fuel pump unit
– GO TO STEP 3.
– Faulty PGM-FI system
– GO TO STEP 4.
– Cam sprocket not installed properly.
– GO TO STEP 5.
– Faulty valve spring
– GO TO STEP 6.
– Faulty camshaft
– Camshaft is OK.