Adjust by loosening the lock nut (6) and turning
the adjusting screw (5) until there is a slight drag
on the feeler gauge. After tightening the lock nut
(6), check again the clearance.
Standard clearance (Cold condition )
Intake: 0.05 mm; Exhaust: 0.05 mm
î
Install the parts in the reverse order of
disassembly.
î
Check the clearance by inserting the feeler
gauge (7) between the adjusting screw (5)
and valve stem tip.
Carburetor (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:
î
Warm up the engine and park the
motorcycle on the main stand.
î
Adjust idle speed with the throttle stop screw (1).
IDLE SPEED: 1400±100 R/MIN
1
2
A
B
(1) Throttle stop screw (A) Decrease r/min
(2) Air screw (B) Increase r/min
Clutch
34
Before inserting the feeler gauge, smear a bit
of engine oil
on the feeler gauge
to avoid
damage to the feeler gauge.
NOTE
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.
Clutch adjustment may be required if the
motorcycle stalls when shifting into gear or
(1) Free play 10-20 mm (2) Clutch lever
2
1