March 2007 Dirt bike magazine, pp. 128-129, shows how to uncork the WR. They say to use a 175 main, DTR-4 needle in slot 4, 50 pilot, 45 leak and 110 air jet. I got these from Yamaha with the manual, spark plug wrench, spoke wrench, etc. Is this a good setup (elev.800'), or is there something better? One other thing - I can't see a number on the needle I got from Yamaha. Can anyone confirm if it is the DTR-4 that comes from Yamaha with the bike (accessory item - I haven't taken the carb off yet).