I would like to understand your goal for splitting all of these into separate midi tracks, as it would be an editing NIGHTMARE, in my opinion, so please elaborate. :)
If, for instance, you wanted to change some rhythm (who thought of that spelling, by the way), you would have to go into each midi track and delete/insert only the events for that one kit piece, and go to the next track to do the same, which I think would be a giant pain in the rear.
What many folks do is have a single midi track for all the drum data, with each kit piece having its audio output from the drum synth sent to its own audio track. This method gives complete audio control over each kit piece (volumes, effects, panning), while making editing midi data for the whole drum kit much easier.
Using the above method, you can still work on one particular midi note's events, using the Event Filter, so you could still operate on just that one kit piece's data, if you wish, but you get all the ease and flexibility of having it all together.
Having all the events together in a single midi track is still not cluttered, as you won't have more than 4 events occurring at the same time, at most, as a drummer only has 4 limbs - and even there the events are in more of a staggered appearance.
Bob Bone