APRILIA RST FUTURA - 2001, Service Manual

Page: 70 / 358

RST mille
USA
SCHEDULED MAINTENANCE AND TUNING OPERATIONS
2
- 22 -
00
Release 00/2002 - 03
2.11 THROTTLE
Check after the first 625 mi (1,000 km) and then every
4687 mi (7,500 Km) or every 8 months thereafter.
2.11.1 CHECKING THE OPERATION OF THE
THROTTLE CONTROL
DANGER
Using the vehicle with damaged, bent or tangled
throttle cables may prevents the throttle from
working properly, causing the rider to lose control of
the vehicle while riding.
DANGER
This can lead to an upset, with subsequent accident,
serious injury, or even death. Never ride your
motorcycle unless the throttle cables are in perfect
working order.
Make sure that turning the handlebar does not alter the
engine idle speed, and that when the throttle is released
it returns gently and automatically to its original position.
DANGER
If turning the handlebar alters the engine speed, do
not ride the vehicle until you have rectified the
problem. Failure to observe this warning can lead to
a runaway engine, loss of control, and subsequent
serious accident, injury, and even death.
If necessary:
Š
Check the correct position and the lubrication of the
following components:
- sheath;
- throttle grip adjuster (1);
- throttle body adjuster (2);
- throttle body pin (3)
- cable fittings (ends);
- throttle control.
Š
Check the idle speed, see 2.11.2 (ADJUSTING THE
IDLE SPEED).
Š
Check the throttle control adjustment, see 2.11.3
(ADJUSTING THE THROTTLE CONTROL).
2.11.2 ADJUSTING THE IDLE SPEED
The idle speed may not be adjusted manually.
The idle speed is regulated by an electric step motor (1),
which changes the air flow by means of a small piston.
The control unit decides whether to open or close the
piston based on three parameters:
- position of the throttle valve.
- engine rpm.
- coolant temperature.
1
5
3
2
2
1