All you should need is likely the cable and a thumb throttle off a 400ex or 04-05 450r. The throttle safety is already bypassed most likely (keeps the throttle from running away). Bonus you can use a TRX90 throttle lever (its longer) more leverage than the others.
-2004 450R. Far From Stock.. Sold, crank was going
-2006 450R. New WHIP..
-Do it right the first time, and you wont have a problem later. Being cheap or taking the easy way out only makes matters worse later.
-Your Backyard Mechanic Extraordinaire: Responsible for bringing you redneck, ingenious and often interesting ways how to fix things.
-You can watch things happen, you can make things happen, or you can wonder what the H*ll happened. Captain Phil Harris