YEC YZF-R6 SS KIT 2004, Manual

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A: Fuel injection Adjustment
Fuel injection amount can be adjusted in the following four ranges:
Code C1: Fuel amount injected at 25% or less of throttle opening and at 3000 rpm or less
of engine speed
Code C2: Fuel amount injected at 25% or less of throttle opening and at 3000 rpm or
more of engine speed
Code C3: Fuel amount injected at 25% to 90% of throttle opening
Code C4: Fuel amount injected at 90% or more of throttle opening
Before changing the settings, check the engine for its characteristics in normal condition.
It is recommended that the settings be checked with an A/F measuring instrument.
Guidelines for setting
•
Code C1: At 25% or less of throttle opening and at 3000 rpm or less of engine speed:
This affects the idling stability and the feeling experienced during races.
Too rich an air-fuel mixture may foul the spark plugs.
•
Code C2: At 25% or less of throttle opening and at 3000 rpm or more of engine
speed:
This affects the feeling experienced during engine braking and at initial
throttle opening.
Make a change of 2 to 5% at a time while checking for any resulting
changes.
•
Code C3: At 25% to 90% of throttle opening:
This affects the feeling experienced at half throttle opening.
Make a change of 2 to 5% at a time and check for any resulting changes.
•
Code C4: At 90% or more of throttle opening:
This affects the feeling experienced at full throttle.
Adjustment to too lean a mixture will lead to engine breakdown.
Adjustment by checking the A/F is recommended.
In particular, to adjust on the leaner side, make a change of 1 to 2% at a
time while checking for the result. 12 to 13 is a targeted A/F.
Engine speed (rpm)
0 3000
C1 C2
C3
Throttle opening (%)
25%
90%
C4
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