Wyldstyle's Super Cycle is the only set I have, so my OCD for film accuracy zeroed in on it during the getaway chase. The flaming exhaust pipes need a few additions, the sides are a bit different, and the front wheel assembly is widened. From what I remember, and studying a few film stills and the trailers:
Flaming exhaust pipes/guns:
Add black goblets to the back of the pipes
Change the Technic pins for the flames from blue to grey (though I'm not sure they'll snap into the goblets)
Change the bottom black friction pins to gray on the inside and longer gray ones on the outside
On the sides:
Change the orange cheese slopes to grey
Change the grey 1x1 tile to what I think are grey wall corner 1x1x1s
Change the orange 2x2 plate to what looks like an orange 1x2 tile and a 1x2 grey plate with a stud; the 2x2 dishes hang off the sides
The dark grey round 1x1 studs on the lower half may be the lighter grey
The main base for the body looks like a 4x6 frame, but that's more of a rebuild than tweaks
Swap in trans-clear cheese slope headlights for the trans-yellow
Rear Wheel:
Change the trans-orange studs to trans-blue
Front wheel:
Find a long trans-blue rod instead of the shorter grey one it comes with
From the inside out, it looks to be a larger black dish/umbrella that the current wheel+dish simulates (and works better as a rolling wheel), a grey 2x2 round plate, the black dish it comes with, and the outer 2x2 grey dish