I AM READING ALOT OF GOOD INFO FOR PIPE, REED BLOCK AND FILTER CHANGES, DOES ANY ONE HAVE SPECIFICS ON JET SIZES? I AM A FIRST TIME USER WITH THE 250 R AND I WANT TO REDUCE MY CHANCES OF SEIZURE FROM A LEAN CONDITION.

if you are doing a pipe, filter, and reeds all at once start 2 or 3 sizes richer than the jet that is currently in the machine, run it, and work from there. you maybe have to mess with the air screw and idle a bit, as well as raising the needle. If you need more info just post back.