An improved replacement oil seal for the RGV250 VJ21 & VJ22 kick starter shaft.
Will also fit all the Aprilia RS250 models.
The original seal is manufactured from Nitrile rubber and has no tension spring fitted.
This seal is also made of a superior material (FKM) also know as Fluro-Elastomer.
Commonly known as the registered brand name " Viton"
It is also fitted with an internal tension spring to help sealing, especially if you have additional wear on the kick starter shaft bore.