What a great site - very infomative (And entertaining at times). Thank you everyone for all the great posts. I picked up a 2005 WR450F last week. I've done all the free mods, and all I have left is the jetting. I have the JD jet kit and the zip-ty fuel screw. I've never done jetting before, and have a couple of questions. Most of my riding will be 1000 feet or less, and 75-90+ degrees (Typical MD) - so I wanted to start out with Indy's recommendation in the jetting d-base: 165 main, JD Red #5, 48 Pilot, 1.25 turns, 68 starter jet, #50 leak jet Questions/observations (Correct me if i'm wrong): -The 165 main jet I believe is included in the JD kit, as well as the red needle. -I assume the 1.25 turns is for the fuel scew. -The stock pilot jet (Yamaha calls this the slow jet?) I believe is a 45, but the diagram gives a part number for the 48 [4MX-14948-06-00]. -The stock leak jet I believe is #50, so I should be ok there. -Trying to figure out the 68 starter jet though. Can someone point this out on the diagram? (Hopefully this link works). Not sure what Yamaha calls this. Thanks to all!