so 13st without gear.
you need .90 springs £89
http://www.ebay.co.uk/itm/SUZUKI-SV6...4AAOSw9mFWG7Kv
RSF 7.5wt oil £12.50
http://www.ebay.co.uk/itm/Fuchs-Silk...sAAOSwu4BVuPMt
to truly make the front end better you will need emulators £80.
or just do what most people think is right and increase the oil weight to 10-15wt and put up with a harsh ride. oil is for dampening, springs are for weight. the heavier the oil the more dampening and slower the forks react = harsher ride.
the biggest problem with the SV is rebound control and this is due to the check valves leaking like a sieve.
if you want a cheepish fix then get springs and oil then weld the rebound holes on the dampers to control the rebound better.
its an easy job as long as you have the tools.