I know guys with 14k on deleted motors.... this $30 mod isn't exactly a mystery.
Got a buddy with 10k+ without regreasing, another with 14k, and I've got around 22k on a few different sleds, greasing few times a year on the first 10k or so, then once a season after that.
There's no more "I wonder" about this, just install it right in the first place, mix enough oil and go ride. If you ever open the motor, or empty the center section for whatever reason, just add more grease.
For first time btw, about 2 hours for install or so. It's a pain, but not "technical"... just a pain getting in there.
Btw, I fixed my pictures on the install thread, google "bdx oil delete" and pretty sure it's right on top. That might give a good idea what is involved.
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