small bag instead off pillion seat

[richard shaw]

has anyone found a nice bag that will replace the rear seat ,big enough to put some waterproofs ,gloves etc, about 10 to 15 litre would be ideal

 

[Silverlining]

Kriega US-15

 

[Badboybez]

You can have mine - she moans a bit but ain't bad a cooking n cleaning

 

[DGB]

Another option; Wunderlich do an Elephant seat bag (8-15L) that fits on top of the seat - you keep the seat in place and install over it. I got one of these on offer from them, a solid piece of kit that proves quite capacious.
They also do a bigger combo seat/rack bag (20L) but that's not cheap mind.