I am very interested in the Zongshen 124. I have read as much of the "Chinese Engine" threads as I can and it seems to have a decent reputation. I heard the engine is bigger than the stock engine, how much so and in what areas? Is it big enough to interfere with cornering?(will I be dragging cases in the corners?) What are the differences between the Zongshen transmission and the Honda's? How bad is it? I will be primarily using this engine for MX racing. My goal is to be able to have both a race bike(Zongshen 124) and a wheelie bike(stock engine) in one. Ideally, I would like to have a stock wheelie bike and a $10,000 race bike, but most of us just aren't that lucky! Final question, how long does the engine swap take? Is it realistic to think that I can swap them back and forth from time to time? Thanks for your help!