Thanks all for your answers.
I bought the short mirrors already, fit well to the "american" bars.
In some months I'll change to "european bars" anyway.
DeeG, I see you own several R, two of them "normal" frame. My question: I find the my R45 quite noisy, and it may be normal as we have to quite rev up for normal riding, but I'm not sure it's not because my silencers are "tired" or something else: is your R45 much noisier than yuour R80 or R75?
Regards,
Sébastien