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SPARK PLUG INSPECTION
Recommended spark plugs:
NGK-CR7HSA, BOSCH-UR4AC
For most riding conditions this spark plug heat
range number is satisfactory. However, if the
vehicle is going to be operated for extended
periods at high speeds or near maximum
power in hot climates, the spark plug should
be changed to a cold heat range number,
consult Authorised workshop Hero MotoCorp
on this if required.
•
Clean any dirt around the spark plug base.
•
Disconnect the noise suppressor cap (1)
and remove the spark plug (2) with the help
of spark plug box wrench provided in the
tool bag.
Use hero genuine engine oil or recommended
grade oil.
ENGINE OIL
(JASO MA2).
GRADE: SAE 10W 30 SL Grade
Manufactured by:
•
Tide Water Oil Co. (India) Ltd.
•
M ake sure that the spark plug gap is
0.6-0.7 mm using a wire-type feeler
gauge. If adjustment is necessary, bend the
side electrode carefully Make sure the plug .
washer is in good conditions.
•
With the plug washer attached, thread the
spark plug in by hand to prevent cross-
threading.
BRAND: Hero 4T plus
•
Tighten with a new spark plug 1/2 turn
spark plug wrench to compress the washer.
If you are reusing a plug, it should take only
1/8-1/4 turn after the plug seats.
(1) Noise suppressor cap (2) Spark plug
1
2
there is apparent wear or if the insulator is
cracked or chipped.
•
Visually inspect the spark plug electrodes for
wear. The center electrode should have
square edges and the side electrode should
not be eroded. Discard the spark plug if
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