brake sensor YAMAHA YZF-R1 2020 Owners Manual

Special features
3-3
3
WARNING
EWA20880
Make sure the engine has sufficient-
ly slowe d b efore shiftin g to a lower
g ear. En gag in g a lower gear when
the en gine speed is too high coul d
make the rear wheel lose traction.
This coul d cause loss of control, an
acci dent an d injury. It coul d also
cause en gine or d rivetrain damag e.
LCS
The launch control system helps the
rider achieve smooth and swift launch-
es from the starting grid. It keeps en-
gine speed from rising when the
throttle grip is fully turned. The LCS
regulates engine power output in con-
junction with the TCS and LIF systems
for optimal traction and reduced wheel
lift.NOTICE
ECA22950
Even when usin g LCS, the clutch le-
ver must b e released g ra dually to
avoi d clutch damag e.TIPLCS is intended for track use only.QSS
The quick shift system allows for clutch
lever-less, electronically-assisted shift-
ing. When the sensor on the shift rod
detects the appropriate motion in the
shift pedal, engine power output is mo-
mentarily adjusted to allow for the gear
change to occur. QSS does not operate when the clutch
lever is pulled, therefore normal shifting
can be done even when QSS is set to
on. Check the QS indicator for current
status and usability information.
Upshiftin
g con ditions
 Vehicle speed of at least 20 km/h
(12 mi/h)
 Engine speed of at least 2200
r/min
 Accelerating (open throttle)
Downshiftin g con ditions
 Vehicle speed of at least 20 km/h
(12 mi/h)
 Engine speed of at least 2000
r/min
 Engine speed sufficiently away
from red zone
1. EBM1
2. EBM2
3. EBM3
4. Engine brake force
5. Engine r/min
1
2
3
4
5
QSS usability In
dica-
tor Situation
Upshifting OK Accelerating
Downshifting
OK Decelerating
QSS cannot be
used Stopped
QSS turned off Turned off
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Instrument and control functions
4-34
4

The ABS performs best with
lon g b rakin g d istances.
 On certain surfaces, such as
rou gh or g ravel roa ds, the b rak-
in g d istance may be lon ger with
the ABS than without.
BC2 incorporates standard ABS and in
addition regulates braking power when
cornering to suppress lateral wheel
slip.
WARNING
EWA20891
The brake control system is not a
su bstitute for the use of proper ri d-
in g an d brakin g techniques. The
b rake control system cannot pre-
vent all loss of traction due to over-
b rakin g from excessive spee d, or
lateral wheel slip when brakin g on
slippery surfaces.The ABS hydraulic unit is monitored by
the ABS ECU, which will revert the sys-
tem to conventional braking if a mal-
function occurs.
TIPThe ABS performs a self-diagnosis test
when the vehicle is started and reach-
es a speed of 10 km/h (6 mi/h). During
this test, a clicking noise may be audi-
ble from the hydraulic control unit, and
a vibration may be felt at the brake le-
ver or pedal, but this is normal.NOTICE
ECA20100
Be careful not to d amage the wheel
sensor or wheel sensor rotor; other-
wise, improper performance of the
ABS will result.1. Front wheel sensor rotor
2. Front wheel sensor
1
2
1. Rear wheel sensor rotor
2. Rear wheel sensor
1
2
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