Honda HHT25S Manual page 23

SERVICE INFORMATION
POOR PERFORMANCE AT HIGH SPEED
Check the air cleaner element
Not restricted
Remove the spark plug and check for
cracks, carbon on the electrodes, and
spark plug gap P. 3-11.
Normal
Inspect the fuel tube for kinking,
pinching, and cracks. Inspect the
carburetor for loose installation and air
leaks around the carburetor insulator.
Normal
Check inside the carburetor for
abnormalities such as hard or stiff
diaphragms P. 5-3, P.
Normal
Check for a restricted spark arrester.
Normal
Start the engine according to the
starting procedure.
2-12
P. 3-3.
5-8.
Restricted
Clean the air cleaner element. Replace
if necessary
Abnormal
Adjust the plug gap; replace if chipped,
cracked, or fouled
• Straighten the fuel tube if it is bent or
Abnormal
• If the carburetor is loose, tighten the
• Check the carburetor shroud and O-
Abnormal
Replace the faulty parts
Plugged
Clean or replace as necessary
HHT25S•HHT35S
P. 3-3.
P. 3-11.
pinched. Replace if necessary
P. 3-14.
nuts securely.
ring for damage and proper
installation P. 5-3, P. 5-8.
P. 5-3, P. 5-8.
P. 3-12.