The bigger you go in the back - the more wheelie prone your bike will be.
54 is
HUGEYour speedo is WAY off with that size sprocket, and you probably can't pull more than 70-75 mph top speed with that either.
Unless your front sprocket is 14t .....
Wow........ 54
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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