Stock main jet on the 2004 yfz 450 is 158.
Some tornadoes do have a feature called an inflow jet. It that inflow jet is to the rear of the tornado it may be called an inflow tail.
You may find information on Jet Lathes on the Jettool website. This website offers detailed information on all their products including the Jet Lathe. This will extend to pricing and availablity and the functions of the tool.
Jetstar
primary jet size 105 secondary jet size 150
JET,MAIN #230137-14143-46-A1 (replaces 137-14143-46-00) this is what was stock.
120main 38pilot
An inflow tail is a narrow jet of especially strong wind flowing into a tornado, usually from behind.
main jet#370 pilot jet#50 throttle valve#2.0 needle jet Q-2 hope this helps you.
70
230
Most civil aircraft have their jets either under-wing or in the tail or on the side of the tail. Most cargo aircraft and bombers have the same configuration. The B-2 has engines buried in the wing. Most fighters used to either have the jet embedded in the body or on the side.