I have considered the R1 fork swap, but the front end on this bike isn't too bad. I could imagine that if I weighed around 70kgs, I wouldn't have a problem with it. It just dives too much under braking, which with a front spring matched to my weight and correct preload will solve.
The rear end has too little rebound damping and is heavily under sprung for my weight. It seems like a very odd mix. My priority for improving the suspension would go to the rear end. I have thought about just replacing the spring but that won't make the rebound problem go away. I will be getting an FZ1 shock soon, thanks to Camo, so I'll be able to give my opinion on it soon. I seem to get all of Camo's unwanted bits