http://www.oemmotorparts.com/default.asp try looking here. Go aprili than scarabeo 50. then scarabeo 50 2003 click no air box to the left, there is a diaogram.
1 is the air filter
you mite look for help
http://www.apriliaforum.com/forums/index.php here.
Hope this helps you. ride safe and good luck
