Never adjust air screw (2). Air screw
adjustment is to be done only by Authorised
Hero MotoCorp
workshop.
CAUTION
CARBURETOR (Idle speed)
A
B
1
2
3
(1) Throttle stop screw (A) Decrease r/min
(3) Throttle position sensor switch
(2) Air screw
(B) Increase r/min
IDLE SPEED: 1400±100 r/min
The carburetor is factory preset in order to
achieve optimum performance and meet
emission standards.
î
Warm up the engine and park the
motorcycle upright on a level ground by
placing a block under the engine.
î
Adjust idle speed with the throttle stop
screw (1).
However in case of specific requirement of
tuning due to engine stalling in idle speed,
please follow the instructions given here under:
If air screw is tampered it affects the overall
performance characteristics of the vehicle.
î
Start the engine, press the clutch lever and
shift into gear. Make sure the engine does
not stall, and the motorcycle does not creep.
Gradually release the clutch lever and open
the throttle. The motorcycle should start
smoothly and accelerate.
CLUTCH
Clutch adjustment may be required if the
motorcycle stalls when shifting into gear or
tends to creep or if the clutch slips, causing
acceleration to lag behind engine speed.
Normal clutch lever free play (1) is 10-20
mm at the lever (2).
î
To adjust the free play, loosen the lock nut
(3). Turn the adjusting nut (4) to obtain the
specified free play. Tighten the lock nut and
check the adjustment.
Throttle Controlled Ignition System (TCIS)
Throttle position sensor switch (3) alters the
ignition timing as per the throttle operation
and ensures optimum driving performance.
(1) Free play 10-20 mm (2) Clutch lever
2
1
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