hello this is a listing for a seat and subframe i've been experimenting with,the seat is dark brown eco leather with kevlar yellow stitch on 2"thick 8ib crash matt type foam,stainless fixings,kevlar stitching,on a bullet proof cnc cut 9mm abs plastic base,with a 3mm abs base  cover to tidy up the bottom 
the subframe is 25mm diameter 2mm wall tube, there's a choice of two,a wider one where the seat sits fully inside and is 256mm (BMW/YAM,SR)  at its widest point and a narrower one which is 230mm (CB/CG/CB) at its widest point and the seat sit's on top of the tube,there both 550mm long 
 like i said i've been experimenting with different base's, types of covers, size's, shape's, and this one is a full prototype and my final design probably wont change much from this seat, so its a shame for it to get ruined in my workshop
if you need to know anything else just ask 
thanks,,shaun