Either model of Power Commander will work on any model year of Yamaha wr250x/r
There is no difference in any model year of motorcycle other than color choices and a rubber gasket on sprockets and a bad fuel pump on some bikes during 2008.
PCIII or PCV will work on any model year of X or R.
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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