OEM Aprilia Countershaft Sprocket 520 Pitch, 17 Teeth - 2B006795 For RS660, Tuareg, Tuono 660 *See detailed fitment list*
OEM Aprilia Countershaft Sprocket 520 Pitch, 17 Teeth - 2B006795
Complete fitmetn list at bototm of this page.
17t sprocket is stock on RS660, Tuono 660
Countershaft bolt torque spec is 50nm or 38ft/lbs
Retaining bolt and washers are sold separately as part numbers: