I just got my new 04 WR450 and I need to set it up for a rally race in Ecuador. I have never owned a Yamaha at all so I don't know the tricks. The rally is 6 days of racing, 2000 miles. Mostly dirt roads with some pavement thrown in. Also from sea level to 15,000 feet elevation. And high speed, very high speed. I need to change the gearing. I have already changed the front sprocket from 14 to 15 teeth, but think I need more top end. I would like it to top out around 100mph. Anybody know the gearing for 100? Thanks in advance.