I tried a bunch of things to get the carb off my 08 wr450, so that i could chaneg the jets. What a P.I.T.A! I was only able to get the throttle stop done in abotu an hour, sine i could barely reach the bolts. This was in part not having a long allen wrench. My question is how can i get the carb to move competely sideways so i can access the top and bottom of the car so i can change the jetting and needle. My local yamaha shop recommened going with the stock YZ450 jetting, a 168 / 45. I hope this works out for me. So if anyone has any suggestions on how to get access to the carb, i would appreciate it. Seems like it is a tight fit behind the aluminum frame, so there is not much to work. In the process, i also stipped the plastic screw top for the hot start. I was frustrated to say the least, and threw a wrench and put a nice size hole in my wall! HELP~!