I have looked through the forum and could not find the answer. I have a 2002 YZ426. I would like to know the correct term for each jet. There are two jets on the air box side. I believe those are called (Starter Jets). one is a 100 and the other is a 200. What do these jets do? Are they called (Starter Jets)? There are three jets in the float area. A main jet. Got that. The jet with the holes crossed drilled, is this the (Pliot Jet or call the Slow Jet)? Then the is a third jet down there. Just a reguler jet. What is this jet called and what does it do? What does FCR mean?