Nowadays, you can downshift all you like without double clutching, although the shift isn't going to be all that smooth and the RPM will rev up.
For example, it will downshift for you if it its sensors feel you aren't fast enough.
Torque is there in a downshift whenever you want it, but the rest of the time power is almost seamless think, and you're passing someone at 95 on the expressway.
Moneysavingexpert.com claims that by taking the "downshift challenge" you can make a typical saving of around £800 a year.
The gearbox is fast and sure when pressed hard, though it seems easily confused in relaxed driving, reluctant to automatically downshift when you ease into the gas pedal at highway speeds.
(It is possible to downshift - you just need to learn to co-ordinate gear changing and throttle operation).
Push the left paddle (downshift) until you reach a comfortable speed.
Go easy on the pedaling to go light on the chain and downshift before you hit the hill, then pedal, pedal, pedal.
If you are just learning to ride, I would recommend learning to brake with two fingers, but not worrying about this method of downshifting until you are more comfortable on the bike.
The latter, therefore, takes longer to master, as you must mash the throttle each time you downshift to match engine RPMs to lower gears.
