Instruction manual

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2–2 YZF-R1
2–2–1 Function outline of the YEC FI Matching System
Map items Functions Contents
(1) Shifter / Cut Time Sets ignition cut time
by each gear
Setting possible by each gear within scope of 0
to 150 ms.
When shifter/cut time (***)=0 ms is set, the
selected gear flameout control can be
ineffective.
(2) Comp. FUEL /
Map 1
Adjusts A/F Corrects fuel amount by increasing-decreasing
within range of ±30%
Effective at 1,000 rpm and higher (Not
corrected at less than 1000 rpm)
Map 1 or Map 2 can be selected with the map
switch. (Contact open: Map 1, contact closed:
Map 2)
(3) Comp. FUEL /
Map 2
(4) Offset IGNITION /
Map1
Corrects ignition time Corrects ignition timing within range of -15° CA
to 5° CA
Effective at 3000 rpm and above. (Does not
make corrections at less than 3000 rpm).
The map switch lets you change between Map
1 and Map 2 (Switch open: Map1, Switch
closed: Map 2)
(5) Offset IGNITION /
Map2
(6) Comp. ETV /
Engine Brake
Corrects ETV opening
(Engine brake
correction)
Corrects basic ETV opening between 0 and 50
steps
(Automatically limits to a maximum value within
the ECU by an operating range).
Enables adjustment at different engine speeds
(and independently for each gear)
(7) Comp. FUEL / All
Area
Adjusts A/F Has same function as (2) Comp. Fuel and
makes uniform correction of operation areas.
Corrects increase-decrease of fuel amount
within a scope of ±30%.