Honda SH300 2006 Manual page 507

TROUBLESHOOTING
7. Fuel Flow Inspection
Inspect the fuel flow (page 6-48).
Is the fuel flow within specification?
YES
NO
POOR PERFORMANCE AT HIGH SPEED
1. Ignition Timing Inspection
Check the ignition timing.
Is the ignition timing correct?
YES
NO
2. Spark Plug Inspection
Remove and inspect the spark plug.
Is spark plug in good condition?
YES
NO
3. Fuel Flow Inspection
Inspect the fuel flow (page 6-48).
Is the fuel flow within specification?
YES
NO
4. Cam sprocket Inspection
Check the cam sprocket installation.
Is the cam sprocket installed correctly?
YES
NO
5. Camshaft Inspection
Remove and inspect the camshaft.
Is the cam lobe height within specification?
YES
NO
6. Valve Spring Inspection
Check the valve springs.
Is the valve spring free length within specification?
YES
NO
25-6
– • Perform the TP sensor reset procedure (page 6-58).
• Clogged IACV passage
– • Clogged fuel feed hose
• Faulty fuel pump
– GO TO STEP 2.
– • Faulty ECM
• Faulty CKP sensor
• Improper valve timing
– GO TO STEP 3.
– • Plug not serviced frequently enough
• Incorrect spark plug heat range
• Incorrect spark plug gap
• Dirty air cleaner element
– GO TO STEP 4.
– • Clogged fuel feed hose
• Faulty fuel pump
– GO TO STEP 5.
– Cam sprocket not installed properly
– GO TO STEP 6.
– Faulty camshaft
– Perform the TP sensor reset procedure (page 6-58).
– Faulty valve spring