Hey King...welcome to the madness...but first let's discuss some rules
Here in OldMiniBikes land, we do not condone the use of non-governed engines due the the explosive potential of liability! All of these engines are designed to max out at 3600 +/- RPM...if you want to go fast, you need to spend some money! There is a tab at the top of the page that will link you to OldMiniBikes warehouse. The have billet parts and camshafts to help you make power. At minimum you will need a billet flywheel (To protect future generations of your direct descendents) and a billet connecting rod. While you are apart, you may as well throw in a more aggressive camshaft. These engines have a tendency to self destruct if they are not used as intended.
As far as your header goes, 11 feet may be too long...will make it hard to go around some corners!
In regards to the extra hoses...you really only need two hoses on a Predator motor...the one that supplies gas to the carb and one to vent out the valve cover
Have fun, go fast, but please be safe. I am sure there are Predator motors going 80MPH, but about the only stock part on it is the pull starter!