Have a 03 Tiger..ratt-ly since new. Fretted about this until I read a comparison test which included a Speed Triple.
The tester compared the engine noise to a wash machine loaded with a bucket of bolts. Since then I think it is quiter...or I have developed selective hearing.
the newer 955 version are quieter sinse they moved the alternator jackshaft away from the cam chain shaft but the earlier ones are noisy and sloppier design