My 1200 GS bike already has ex factory an electrically operated valve in the exhaust to make more noise as the revs pass a certain point. Irritating TBH - makes it too noisy.
I believe that many exotica have similar systems.
Wonder what will happen with electric vehicles. I did the Lotus 60th celebration in 2008 and one of the cars on show was an Elise built out of reclameable materials ( jute I think) and electric powered. To get round the problem os the silence they had coupled a sound system and amplifier up to the throttle so it made exactly the saem noise as if it had a petrol engine.
Last edited by howard; 29/10/14 05:34 PM.
