I've got an R6 shock on mine too and agree with Scotty, totally transformed my bike. I'm not sure whether the mountings for the R1 shock will be compatible or i assume Luke would have tried that a long time ago. R6 is more or less a straight swap (different dog bones).
This is the thread about it:
R6 shock Mod fazer 1000
https://r.tapatalk.com/shareLink?url=htt...are_type=t
This is the thread about it:
R6 shock Mod fazer 1000
https://r.tapatalk.com/shareLink?url=htt...are_type=t