Hey mate,
As said above, the obvious and best way to gain more ground clearance is to change your pipes to a 2-in-1. However, it's a more costly path.

I'm 6'5", so I wanted a higher bike (which translates into more ground clearance) so I made up a few sets of dog bone linkages to lift the rear end to various heights. They work a treat - I settled on links that were 80 mm centre to centre (see pic).

I also got some work done on my forks. I got a new set of springs (racetech non-progressive) plus emulator valves to reduce the terrible stock sag and diving under brakes which destroys your ground clearance. I also got machined up a set of extended fork tube caps, meaning I could basically drop the forks further down thru the yolks about 20 mm. It was a pretty cheap fix, considering I've also got great front suspension now.

All up I have about 2 inches of extra ground clearance and the bike is a whole lot more comfortable for a bloke my height. It still turns well and handles the rough stuff heaps better. Of course, if you're not wanting to raise your seat height then the re-routed pipes are the best option.