I just built my 2002 Yamaha YZ426 in to a SM. Way to fun to ride. Should be illegal. What ever you do, don't start with a bike that comes street legal. They have a bunch of smog, and carb restrictions. You should be able to buy a mid to late 2000's 450 and convert it. I spent about $500 on the Dual sport kit, $250 on a used stator off ebay, $50 for a kick stand, and look to spend at least $1000 on wheels and tires. There are many more mods out there for off road bikes compared to dual sports. Oh ya, converting the title is a breeze! i think it was 30 bucks total. YOU DO NOT NEED TO HAVE IT INSPECTED. they will try and tell you that you do but by law you do not, unless it is a out of state bike.