first off, my bike isn't a "thumper." But I had a guy from my GS forum tell me this was the place to go for supermotord intormation. :-) I tend to trust my GS friends, so here I am. Here's the plan. Pick up spare wheels. Preferably from a newer RM than I have. (my bike is "mostly modern" it's a 1983 rm250, so it has a flatslide carb, water cooling, long travel suspention, but the seat doesnt' go up over the tank, and it has drums, and now powervalve) I live somewhere that ridable dirt... well... is next to imposable to find. So the next idea other than just riding the living daylights out of hte bike, was to get it out on the street. The tires I use on my streetbike are available in sizes that will fit the RM. I use Bridgestone BT45's on my streetbike. And RM wheels in stock sizes are cheap and pleantiful. (read $30 shipped on ebay) At least that's the cheapest way I can concieve of getting "good" road tires on the bike. And using a newer RM wheel would get me a disk brake. I happen to have brake master cylinders and calipers I can use on said disk as well. Are the front disk mounts universal? I know that at least the whole of the suzuki sportbikes use the same 5 bolt disk mounting pattern. or am I going to need to get creative with adapter plates? now there's a final problem. Lights. In illinois you need a headlight, taillight, and brake lights. Great, that means the switch setup is simpler. HOWEVER, this is a pure dirtbike. And it doesn't have a "normal" stator setup. Instead of having a magnet swinging around the stator. It has a magnet swinging INSIDE the stator. it also has two coils, so there's really no room to try and suck more power out of that electrical system. Basicly, I need to leave the ignition system intact. The other option is to run a battery. Again, we have this whole chicago-flatlander problem. It's a coupple hour drive to get anywhere worth riding. or a 40 mile drive to get downtown. so this pretty much eliminates the idea of running a total loss electrical system. Also, it gets dark fast in the countryside, so I want a good headlight. drawing 10 amps of headlight is a very quick wayt o kill a battery. *sighs* This means finding some way of generating electrical power. And I think my roomie and I have found a solution. There's a ready made alternator that most geeks have. Stepper motors. Coupple that with two phases of your average, run of the mill regulator rectifier and you have a darned good power source. :-) (testing with a nema 23 size stepper provided 98vac at 1200rpm, this worked out to about 200 watts of electrical power) So for all intents and purposes the electrical system problem is solved. So.. For this lowcost supermoto... $170 for tires $15 for the stepper motor $0 for the R/R (this is a part I have in stock in the house) $40 for the lights $60 for wheels (I would like to keep a set of dirt wheels as well) Registering the bike may be a problem. only "may" becuase I think I can sneak it through under "custom construction" seeing that the bike never was titled in the first place. Has anyone else taken a motocross bike and made it into a street legal supermoto style bike? How have they dealt with the challenges?