OEM Aprilia Handlebar Weight Kit -#8796998 (AP8796998)
OEM Aprilia Handlebar Weight Kit -#8796998
For '06-'08 SportCity 250
Includes all needed hardware.
Bar ends weigh 150 grams each.
Instructions are included, but in brief you cut off end of grip with razor. Insert compression bar end weight assembly as shown in the photo above and tighten until expansion plug no longer allows the bar end weight to spin.
Link to Youtube video showing installation.