Listening to the soloed track I can hear some chromatic notes in the beginning of the lick so the tab from the book posted above could very well be accurate. Anyhow in recordings there are often human mistakes that are unintentional and I could bet my life on that this is the case here (waiting for crucifixion from the Vai mob now). To me these unintentional “wrong” notes can sometimes be what makes the whole lick so great, Yngwie has a lot of those. And I was always amazed with the players that really went for the EXACT rendition of a solo. Troys old version of YJMs “Now the ships are burned”-solo is one of those that really captures every nuance of the original. Wow!
But sometimes it can also be interesting to try to figure out what was actually intended to be played. Especially when learning licks like these that probably came from smaller lick fragments pieced together to make this long run.
So it’s with that in mind I transcribed this lick now. Almost all the fragments are outside string changes which makes swiping possible whether you’re DSX or USX. I would guess he uses USX though as the first fragment uses a little bit unusual fingering to make an upstroke inside string change. Also, enjoy my daughter’s nail polish skills.
Edit: I just realized i missed two notes at the start. There should be two descending notes on the E-string starting on the pinky. To be exact, Steve actually starts one chromatic note beneath the “intendend” note (probably from sliding into the lick) which gives the chromatic sound.