I'm 230 and upgraded both front and rear springs. That along with a fork brace (ours of course) made a huge difference. I suggest trying a Wilber's rear shock spring on the stock shock with the rebound dampening backed off 1/4 turn from full.
Check Sonic springs for the front. The have a calculator on their site that is very helpful.
Seriously, these changes, along with a fork brace, make a huge difference in how a V-Strom behaves. It goes from a wallowing long legged dual sport to feeling like a tight sport touring machine.
You can always go back and buy the shock without the spring later.
I'm also 230 lbs. I did the calculation based on both of us at 373lbs. Recommended fork springs are 1.2 kg and shock at 17.66 kg. (basically the stiffest)
Is that the correct way to calculate? We will be riding together 95% of the time.
2012 DL1000 Adventure (Tinkerbell)
PC-V, TRE, CR8EIX , ECM, K&N, RDL, PR4, PC-8, EB H4, WERKS, Madstad 22", 17/43 gearing, AdventureTech: Fork brace, shelf, mirror extenders, SpeedoDRD, wheel spacer, Head's-Up voltage monitor, Goldwing pegs, Sonic 1.1, Wolo Bad Boy, ExTuff Helmet Hook.