High guys, I'm considering possibly getting a yz450f to ride off-road. I could possibly race some hare scrambles, but it would mainly be for my own single tracking and recreational riding. Right now I'm used to 2-strokes, and i could go with a yz250 because of love the lightness and how the 2-stroke operates in the woods. But i've always wanted a bit more torque, traction and top speed for other applications. Im wondering, who here rides the 450 off-road, and what do you think of it's off-road manners? I'm afraid of it being too brutal, to heavy, or not good at chugging at low speeds without stalling or flaming out. or all three combined. Does the stock yz450 have a leak jet? or does the carb need some modification to run healthy at low speeds? Im also worried about maintenance. What should i expect to do on a daily to weekly bases with a 4-stroke 450? I understand the yamahas are the most reliable (give or take a few lemons). Also, what year did the alloy frame start. and what year were the 450s 5-speed?