I assume it has been restricted to 33bhp for use on an A1 license?
If so it will either have been done through the ECU if your bike is fuel injected. Or (more likely) it is carbs then there will be large washers inside the inlet rubbers restricting the bore of the carbs. If you take the carbs off and pull these out you'll have access to your bikes full potential.
Regards
Chris
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