Recommended plug
NGK-CPR 8 EA 9 BOSCH UR4DC
For most riding conditions this spark plug heat
range number is satisfactory. However, if the
motorcycle 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.
î Clean any dirt around the spark plug base.
î 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.
î 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.
î Make sure that the spark plug gap is 0.8-
0.9 mm using a wire-type feeler gauge. If
there is apparent wear or if the insulator is
cracked or chipped.
î 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.
î With the plug washer attached, thread the
spark plug in by hand to prevent cross-
threading.
î Tighten a new spark plug 1/2 turn with
after the plug seats, with a 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.
AIR CLEANER
The air cleaner element is of Dry Paper
Pleated type it should be serviced at regular
intervals (page 30). When riding in dusty
areas, more frequent service may be
necessary.
1
2
(1) Side cover (2) Side cover screws
33
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