APRILIA RS 660 2020 Manual page 175

CAUTION
INCORRECT MAINTENANCE MAY CAUSE EARLY WEAR OF THE DRIVE CHAIN
AND/OR DAMAGE THE FRONT PINION AND/OR THE REAR SPROCKET. PER-
FORM DRIVE CHAIN MAINTENANCE OPERATIONS MORE FREQUENTLY IF
YOU RIDE THE VEHICLE IN EXTREME CONDITIONS OR ON DUSTY AND/OR
MUDDY ROADS.
CAUTION
DO NOT MODIFY THE FINAL DRIVE GEAR RATIO OR THE NUMBER OF LINKS
IN THE CHAIN.
Characteristic
Final drive ratio
17 / 43
Type
Regina 110 links
With sealed master link
Model
520 - 135 - ZRA
175