In open bikes streamlining is anything in front of the rider that appears to direct or divert air.
Seat and tail follow partial streamlining rules.
I would not use the wrap around rear fender.... it will grab air and slow you down.... and if I remember the tail and rear fender rule say it can't extend past the back tire.
Use bars that force your elbows in to help the rider maintain a tight tuck. Smallest rider you have.... be sure your rider and owner is a BNI member and must have a motorcycle drivers license.
Good luck with your project... Become one with the motorcycle
edit... Take a good look at the picture of the current record holder.... read the rules 50 times.... don't add anything to the rules... nothing is implied, they are what is written in the book.