Spark plug inspection
Recommended plugs: NGK-CPR6EA9
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 Hero MotoCorp
workshop on this if required.
Ÿ Clean any dirt around the spark plug base.
Ÿ 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.
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Ÿ 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
there is apparent wear or if the insulator is
cracked or chipped.
Ÿ Make sure that the spark plug gap is 0.8-
0.9 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.
0.8-0.9 mm
Ÿ With the plug washer attached, thread the
spark plug in by hand to prevent cross-
threading.
Ÿ Tighten a new spark plug 1/2 turn with
spark plug wrench to compress the washer.
If you are reusing a plug, it should only take
1/8-1/4 turn after the plug seats.
Engine oil
Use only hero genuine engine oil.
BRAND: Hero 4T plus
GRADE: SAE 10W 30 SJ Grade
(JASO MA).
Manufactured by:
Ÿ Tide Water Oil Co. (India) Ltd.
Ÿ Savita Oil Technologies Limited.
Ÿ Bharat Petroleum Corporation Limited.
OIL CAPACITY: 0.95 litre
(1) Noise suppressor cap (2) Spark plug
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