Control functions
11
ESU13751
Throttle override system
(T.O.R.S.)
WARNING
EWS00042
If the T.O.R.S. is activated, make sure that
the cause of the malfunction has been
corrected and that the engine can be op-
erated without a problem before restarting
the engine. Continuing to operate with a
malfunction could cause loss of control or
damage.
If the throttle valves or throttle cable malfunc-
tions during operation, the T.O.R.S. will be
activated when the throttle lever is released.
The T.O.R.S. is designed to override the fuel
injection (RST90TF / RST90TFL / RST90TFY)
or ignition (RST90) and limit the engine speed
to less than the clutch engagement speed if
the throttle valves fail to return to the idle po-
sition when the throttle lever is released. (See
page 110 for the clutch engagement speed.)
TIP
If the T.O.R.S. is activated, the warning light
and engine trouble warning indicator flash,
and the two-digit code “84” displays
(RST90TF / RST90TFL / RST90TFY) or flash-
es (RST90) in the meter display. If this occurs,
have a Yamaha dealer check the system as
soon as possible.
RST90TF / RST90TFL / RST90TFY
RST90
ESU14851
Multi-function meter unit
RST90TF / RST90TFL / RST90TFY
The multi-function meter unit is equipped
with the following:
1. Throttle lever
Idling
Riding
Malfunc-
tion
Throttle
lever
Released
Squeezed
Released
Throttle
valve
Closed
Open
Open
T.O.R.S.
Engine
runs
properly.
Engine
runs
properly.
T.O.R.S.
will be
activated.
1. Warning light “
”
2. Engine trouble warning indicator “
”
3. Two-digit code “84”
1. Warning light “
”
2. Engine trouble warning indicator “
”
3. Two-digit code “84”
U8JV70E0.book Page 11 Monday, April 6, 2015 11:49 AM