I just bought a 2000 Foreman 450 es and was told the first gear was out. When I picked it up it rattles in Neutral and all gears. It appears that the electronic shift is working, but it tries to go in all gears and dies after about 20 seconds. I have only had it running for about 2 minutes because I don't want to make any problems worse. Rusty water is coming out of the exhaust and the rattle sounds like it is coming from the right side of the engine by my foot. I don't know much about repairing quads, but it sounds like a pulley might be loose and is keeping the quad from going or staying in gear. The motor seems to have power until it dies and some gas leaked out of the drain tube the second time I started it. The original owner said he has had it in water before up to the seat, so I'm wondering if water got into the engine and is causing the problem. Any suggestions?