Thanks I bought one off ebay from a dealer very close to me and well the springs is way too stiff and the rear end bounces all over. I'm gonna try and change the springs over from stock to the new one.
I have been looking at the progressive suspension shocks,sent them a email to try and get measurements. still no response.
Yamaha really screwed up. The machine is to light and needs a sport shock even stock the ass of my wolvy got out of controll over bumps.