Car drivers don't know nuffink. Here's what your left thumb could be doing if you were misguided enough to buy a Honda Africa Twin (two wheeled version of a range rover, specifically designed for people that never go off-road). And, yes, there are more buttons round the back.
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The Royal Enfield version being
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That's all, folks. Dip/main, left/right, toot toot. Ya gotta love a bit of simplicity.
Yup. Not a lot going on here, just what you need and no more.