Hey Tonnyguy! welcome to the club. I just got my vader running good yesterday. The stock headlight bulbs draw to much and kill the battery. I replaced mine with these
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
Also my carb had the throttle screw backed way out, and made it so that my electric start wouldn't work and the bike wouldn't idle.
I think used wet clutch safe 10w-30 for oil. Change every 100 miles or so for the break in period.
Always use premium gas!
As for faster a lot of people are switching their carbs to a mikuni 26mm vm22.
Doing a sprocket change will get you a bit more in top speed, but slow your acceleration. 15t or 16t is common.