Hello
I have the xj900 diversion. what i have done which helps and will make you all laf is this. gel heel pads for ladys shoes around the frame for the seat to sit on and also under the fuel tank so it also sits on them, a round mouse matt with the gell rist rest cut then put between the tank and the seat held in by the seat cuts down the vibration on ya man bits. Now you may laff at this but trust me it all works a little and that little helps and it was all very cheap off fleebay. Mouse matt 99p, Gel heels about £3 for 20. Have a go its a cheap part fix. Most things Gel are good for stopping vibration. I did read once on the yamaha xs1100 owners club site that somebody put clear gel into there handlebarrs they claimed it worked a little.
