Have you serviced it? I'd imagine a good clean and rebuild with fresh copperslip will improve it's power.

Putting fresh fluid in will doubtless help too, as you don't know when (if ever) it was last changed.

Oh, and read this:

tuning
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball