I'm in process of going through a 2000 WR400 bike that has not run in a year. I have carb. off for cleaning and going over. How do I know if throttle stop has already been done? Original length vs. mod? If I do airbox,throttle stop, and grey wire, and pull end plug out of silencer is re-jetting automatically required? I know you riders hate these same questions repeatedly, but read through about 20 pages of postings and did not see definitive answer. I'm in N.C. where elevation is not a real concern. I'm new to this bike and still learning. Thanks for input.