This seal is a replacement for the FJR1300 clutch slave seal that eventually wears and allows fluid to seep from the bottom of the clutch slave seal unit. This leads to a clunkier gearbox than normal and then, ultimately, loss of the clutch lever action.
I have had these especially manufactured exclusively for the club as Yamaha dont supply a replacement seal ; You have to buy the whole unit at a cost of over  £137!
They have been tested on  a worn slave cylinder on my own bike (still on it now) and they work as good as a new unit.
Full fitting instructions supplied.
 
 NB Available to fit FJR1300 2001 - 2005 models and also 2009-12  models.*
 
*Not suitable for 2006/7/8 models or the clutchless AS model as these use a different size seal.