You might want to look at Husqvarna. Several options, all are relatively light. The TE310 is just under 250lbs, but storage would be limited. Some of their bigger displacement bikes are still very light and when properly uncorked are really powerful. KTM doesn't suck either. Good luck.
Famous last words, "Hey 'yall, watch this.." (V. Knight)
2012 VStrom 650 Adventure
2012 Husqvarna TE 250
2011 Ninja 1000
2013 HD Softail Slim