There are some great threads here on motorcycle aerodynamics. Start by looking at craigvetter.com for the latest developments in full body fairings. Decide if you are inclined to lean forward or backwards to lower your profile. The nose piece needs to be fairly stiff to resist the wind pressure and the bulkhead just behind the rider can be plywood or honeycomb aluminum. I like using sailplane fuselage plans to get a good shape. See
www.vintagesailplaner.com/Sheet1bis-9.pdf or look for free sailplane plans.
The dealer's mechanics may be familiar with adjusting FI to aftermarket exhausts or they may know some tuners that race prep engines. Check with MotoQ.com on their Powersport projects for scooters too.