I don't know karate, but I know karazy. Here's Jabo Starks playing James Brown's classic, The Payback, which, if you don't already have the record, you may know from Lock, Stock, And Two Smoking Barrels, Dead Presidents, or Django Unchained. On the intro Starks plays very simply, with the snare drum on 2 only:
When the groove gets going for real, the snare is on 2 and 4, and he adds some small embellishments. All of those extra notes can happen on either half of the measure: the open hihat can also happen on beat 3, the ghost note on the snare drum can happen after beat 4, and the 16th note on the bass drum can happen on beat 2. Listen to the track, and mix them up freely.
Towards the end, you increasingly hear these ghost notes— or some part thereof— on the snare drum. There's a light swing to the 16th notes.
Here' the track: