My wife was riding her LTZ 250 last week when she down shifted the transmission got stuck in natural. I tried to get in back in gear but it wont hookup. Seems like there is something stuck preventing it from going in gear. When you shift out of natural the green N light goes out but it is not in gear. I can shift back to natural and in to reverse, reverse light goes on but still not in gear. I pulled the side cover off the engine and the shaft gears are in good condition. Is this a known problem? Do you have to break down the whole engine to get to the transmission?