32
NOTE
Always ensure to reinstall the drain tube plug
after draining the deposit.
Follow the above process more frequently
when riding in rain or at full throttle.
Carburetor cleaning (Idle speed )
The carburetor is factory preset in order to
achieve optimum performance and meet
emission standards.
However in case of specific requirement of
tuning due to engine stalling in idle speed,
please follow the instructions given here
under:
Ÿ Warm up the engine and park the vehicle on
the main stand.
Ÿ Adjust idle speed with the throttle stop
screw (1).
IDLE SPEED: 1400 ± 100 RPM
CAUTION
!!
Never adjust air screw (2). Air screw
adjustment is to be done only by Authorised
Hero MotoCorp workshop.
NOTE
Always adjust the idle speed in i3s switch
“OFF” position.
If air screw is tampered it affects the overall
performance characteristics of the vehicle.
VALVE CLEARANCE
Excessive valve clearance will cause noise, and
little or no clearance will prevent the valve
from closing and cause valve damage and
power loss. Check valve clearance at the
specified intervals (page 26).
2
1
4
(1) Crankshaft hole cap (2) Timing hole cap
(3) 'T' mark (4) Index mark
12
A
B
(1) Throttle stop screw (A) Decrease rpm
(2) Air screw (B) Increase rpm
3
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