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Fuel System
Tuning For Special Condition
Once you've adjusted the
carburetor
for temperature
and altitude, it shouldn't need major
readjustment unless the race
condi-
tions
change
drastically. Exclusive of the correction factors
,
there are
some unique atmospheric or
race
day situations
that
may require additional adjustments. They are as follows:
Main Jet
Go richer on the main
jet.
by one number.
When:
the track
has a very
long
straightaway.
steep
climbs,
a
high
percentage
of sand.
or the track
is
muddy.
Go leaner on the main
jet.
by one number.
when: it is very humid or
raining
.
or
it
is very hot above 45
°
C
1113°FI.
Jet Needles
·
Under normal circumstances. the standard jet needle
can
be adjusted to fit most
situations.
However. a
peculiar
condition
may require replacement of the
standard jet
needle. But before replacing the standard
nee-
dle, complete all the carburetor adjustments
(page
4-3
through 4-4)
.
If mid-range performance
is
still not
satisfactory. try one of the optional jet needles: See page
1-
21
.
4-5
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