The beginnings So after buying a used frame for a street legal title then finding out that the laws have changed on registering dirt bikes in Wyoming I have a spare frame. I had a husky 250 1973 area and I thought about putting that into it. But needless to say the backwards kick-starter and odd angles of that engine, and a froze up crank deterred me from pursuing that route. I then thought about my engine that is in a old polaris four-wheeler: my buddy and I happened upon a old IT465 that had been run over by a piece of farm equipment. Frame was pretty busted up but the engine started up and ran fine. So we threw it in the four-wheeler. After going to college it sat and around and ended up with the same fate. except a bail of hay was the culprit. Then a few weeks back I spotted the YZ490 in the newer frame and loved the idea!! So I talked to my old man and had him pull the engine and bring it out to me as he headed to Virginia. So hear it is and I set it in the frame to see how far off it will be. Any advice is appreciated. And don't criticize me for wanting to put it in here I have a frame and spare time on my hands so I'm going for it. Suprisingly it fits pretty snugly, the modifications look like they will be simple if not straight forward I'm going to fab up the brackets over the next few weeks and get a swing arm and mount the engine temp and decide how to cut and re-weld the frame. I'm going to need advice on what parts and years of suspensions, triple clamps and what not would be best to buy. Bit by bit I'll gather up the parts and put this thing together. I'm trying to brainstorm on how to best do the exhaust on the poor thing (it'd be so much simpler if the exhaust came straight out the front!!) So here are the pics. You'll notice this is where the frame mod's will have to happen. exhaust is just a little behind the Y in the frame. Should be a fun build.