Not re-jetting will cause your scooter to be running a little bit lean after doing the other two derestrictions so it's a good idea to change the jet.
The jet is not really anymore difficult than the drive boss or CDI. I didn't search cuz I'm in a hurry right now, but I'm sure there are plenty of threads available in this forum on how to re-jet. If you can't find any here do a youtube search and you will find one.
Did a quick search, this looks like it shall suffice though..