32
•
D
isconnect the
noise suppressor
cap
(1)
and remove the spark plug
(2)
with the help
of spark plug box wrench provided in the
tool bag.
Recommended spark plugs:
SPARK PLUG INSPECTION
NGK-CR7HSA, P-RZ9HC (Federal
Mogul) and 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.
•
C
lean
any
dirt around the spark plug base.
Manufactured by:
•
Tide Water Oil Co. (India) Ltd.
•
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 hero genuine engine oil or recommended
grade oil.
•
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
GRADE: SAE 10W 30 SL Grade
(JASO MA2).
(1) Noise suppressor cap (2) Spark plug
1
2
0.6-0.7 mm
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
