Oil seal -RMS- 19x30x7mm on the variator side for GILERA/PIAGGIO 50cc 2 -Stroke AC/LCAprilia Mojito 50 (2004-)Aprilia Scarabeo 50 (2004-) (2-stroke) (Piaggio engine)Aprilia Sportcity 50 One (2-stroke)Aprilia SR 50 Di-Tech (07.2003-) (Piaggio engine)Aprilia SR 50 R Factory injection (2005-)Aprilia SR..