Change your oil to straight 5-weight and run your tires rock-hard. The bike will go faster and get better mileage too, right up to when the engine seizes. Use a Lithium-Iron battery (lighter), a lighter exhaust, replace as much of the bike with titanium as possible, drill holes in everything possible, take off the unnecessary crap like the lights and brakes, front and rear fenders, the parts of the frame which hold the seat and fenders, convert it to a hard-tail and take off that suspension crap, run with no seat... it will go way faster, dude.

Over 40 years of riding and I know that more fuel in the more speed out you cant have it any other way

More speed requires more fuel. No way around it, you can't have both. You will have to choose fuel mileage or speed.

Add a Power Commander and have it professionally tuned - but speed costs (money or fuel) how fast to do you want to go?

Marry fuel conservation if its the decent thing to do

but having done that you will find it is easy to cheat.

Slow down less, inertia is the enemy of all bikes, if you keep up your momentum you will be going faster.

Do not do this because it will effect your bike engine.

Make it lighter and more streamlined