Could have been, or because it had aftermarket pipes, or no air filter, or because the previous owner didn't know what they were doing!

So long as it runs right, then the actual numbers don't mean a thing.
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball