What is the best jetting for a 2007 Yamaha WR450F? TT memebers, I have read a LOT of info here on jetting the WR450. I have gone though a LOT of searches as well. So I need some help from those that know. I Bought the FMF 4.1 exhaust Also Bought the GYTR AIS kit, I live in Georgetown Guyana ( neighbor to Brazil) 3 feet' Elevation, what should be my settings be with this elevation? i ride mainly along the coastline Pilot: ? Main: ? Needle: ? Air Jet: ? Leak Jet: ? Fuel Screw: ? Throttle stop: Short Screw.