Fair enough.
They also put some other things on the bike for a reason as well.
AIS, flapper, EXUP, and airbox door to name a few. Many of us have altered or removed those things completely.
Find the thread and pitch of the countershaft nut, and then start searching for alternatives to the stock piece.
Please post what you find. I'd be interested in an aftermarket alternative if you find one.
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2008 WR250X
Gearing: 13t - 48t
Power Commander 5 / PC-V
Airbox Door Removed - Flapper glued - AIS removed
FmF Q4
Bridgestone Battlax BT-003rs