If you do need jets in your fine tuning, you'll probably find that any shop that sells dirt bikes will have a box o' jets somewhere handy. I've found everything I needed locally. I don't really know the difference between the long and short mains for the FCR, but I've successfully used either in two different bikes. Seems to work just find with either. Maybe I'll look it up one day.
by using this code. LW9ZIPzdRGzaI