Don't listen to these guys (no offense to them but they don't understand elevation) Start with a 290, you will probably end up at a 270 though. Leave the stock pilot, you may even have to go to a 22.5, I've only had to do this to a couple bikes though, most do fine with a 25. Needle should be in the middle clip. You ever coming up to walden? If so I'll help ya get her dialed in