Here's an easy way to treble the storage bin space under your back passenger seat, this is a nice storage space but limited on how much it can hold , I recently had to remove this bin to get access to some bolts for my auxiliary tank, when I remove the bin I was amazed on the amount of hidden wasted space there was. I normally carry some spares in this bit, here are some photos of before and after, the two boxes in photo 1 is what I normally can get in the bin, now I can carry the same two boxes of spares and a lot more other things can be tucked away
remove the 10 screw and 4 carpet retainers on the lid to remove the storage bin, then just cut off the plastic bin just under the lid. and refit, job done.