The beat the song is built on is one bar, played through bars 74-76, 111 and 144-157, and 51 more places -- 27.1% of every bar the kit plays. That is the spine of it; everything else is what happens around it.
It is played on crash, hi-hat and snare, counted in thirty-second notes. On its own it scores 8 out of 100 -- straightforward -- and the thing that decides that is how fine the subdivision is.
The whole song is 85 out of 100, so the beat is not the hard part: what costs you is everything around it, the joins and the fills.
A part this hard is not learned by playing it slowly and hoping. The room opens it on its simplest reduction -- the timekeeper alone, at 90 BPM -- and adds the notes back over 3 rungs, each with a tempo to reach and a gate to pass before the next.
Tempo goes 90, 105 and 120 BPM, and the gate at each one is 8 loops in a row with no wrong note and no wobble in the time.
PRACTISE THIS BEAT →A one-bar groove on crash, hi-hat and snare, in 4/4 at 120 BPM, counted in thirty-second notes. It is written out above, and it covers 27.1% of the bars the kit plays.
Bars 74-76, 111, 144-157 and 161, and 50 more places. The time is kept on the ride to start with, and it changes 26 times over the song.
8 out of 100 on its own -- straightforward. The song as a whole is 85 out of 100. Hard, and what makes it hard is the independence between the hands and the feet.