APRILIA Tuono 660 2021 Service Station Manual page 332

Braking system
The ABS system may be set to three different levels from 1 (minimum slip control) to 3 (maximum slip
control), from the specific setting screen (see paragraph in the "SELECTING MAPS").
Level 1 is suitable for performance use by expert riders only. At this level the lifting control of the rear
wheel is not active and neither is the cornering system. ABS is effective on the front wheel only.
Level 2 is suitable for performance use in good grip conditions. Rear wheel lift control is active, but at
a more performance-biased setting, allowing a certain degree of rear wheel lift in specific braking con-
ditions
Level "3" is suitable for day-to-day usage in all conditions - e.g. on urban or extra-urban roads, in wet
surface conditions. It does not allow, in most cases, for the lifting of the rear wheel.
CAUTION
BEFORE RIDING OFF, CHECK THE ABS LEVEL OF INTERVENTION SELECTED. SHUTTING
DOWN THE VEHICLE RETURNS THE ABS SYSTEM'S FUNCTIONALITY TO THE LAST ABS LEV-
EL UTILISED.
NOTE
WHEN THE ABS STARTS WORKING, A PULSING IS FELT ON THE BRAKE LEVER.
THE ANTI-WHEEL LOCK SYSTEM DOES NOT PREVENT FALLS ON A BEND WHEN LEVEL "1"
IS USED.
AN EMERGENCY BRAKING WITH THE VEHICLE INCLINED, HANDLEBAR TURNED, ON UNEVEN
OR SLIPPERY ROADS, OR WITH POOR GRIP, CREATES A LACK OF STABILITY DIFFICULT TO
HANDLE. RIDE CAREFULLY AND SENSIBLY AND ALWAYS BRAKE GRADUALLY.
DO NOT SPEED RECKLESSLY. THE VEHICLE GRIP ON THE ROAD IS SUBJECT TO LAWS OF
PHYSICS WHICH NOT EVEN THE ABS SYSTEM CAN ELIMINATE.
When the vehicle is started, after the initial instrument panel check cycle, the ABS warning lamp flashes
until the vehicle reaches a speed of 3.1 mph (5 km/h), after which it goes out.
If with the ABS activated (level 3, 2, 1) the ABS warning light turns on permanently, or continues to flash
even when exceeding 5km/h (3.1 mph), a failure has been detected and the ABS has been deactivated.
In this case carry out the following operations:
- stop the vehicle;
- Key OFF-ON;
- ride the vehicle to a speed above 5 km/h (3.1 mph): the ABS warning light must be turned off;
- the ABS system is working.
If the ABS disabled indication remains:
NOTE
IN CASE OF EXTENDED REAR WHEEL ROTATION WITH THE FRONT ONE LOCKED (BURNOUT,
MOTORCYCLE ON THE CENTRE STAND, ETC.) THE SYSTEM CAN BE DEACTIVATED AUTO-
MATICALLY WHEN THE ABS and a-PRC INDICATOR LIGHT STAYS ON.
TO REACTIVATE, TURN THE IGNITION SWITCH OFF AND THEN ON AGAIN AND SELECT THE
REQUIRED SETTING.
NOTE
BRAK SYS - 332
RS 660 - Tuono 660