I have rode the Yz450 a number of times and love the power in the bike, although i do more trail riding than motocross. I know that the Wr450 has a headlight, tail light, electric start, and a larger gas tank all very nice when riding the trails. I also know that the Wr450 is "plugged up" to meet California's green sticker and won't run the way I want it to without "uncorking" it and that costs money... So i would like to know weather to buy the Wr450 and just "uncork" it or if i should get the Yz450? Again i plan on trail riding! Also could I put a head light and electric start on the Yz450? If so how much would that cost me?