This is an issue I've never read about regarding the wr250r/x until now:
click me for details <-- clicky
Fortunately it's not my issue, but none the less, for those who might be experiencing power loss issues and can't track down the problem you may wish to check your canister if you have an aftermarket system that uses packing.
Just an FYI and a thread for future reference.
Happy Trails.....
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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