What are you seeing back there?
With my large frame I could see nothing behind me with my stock LIKE200i mirrors. The first thing I did was set about finding some mirrors that let me see a bunch of what is happening behind me.
After trying the unsatisfactory Chinese mirror 'extenders' - I found these long-stemmed Italian mirrors. No uglier than the 'extenders', and the glass can be swung very close to my forward line of sight, while still seeing past my shoulder.
Here he comes....
Look for 10mm mirror stems, rather than 8mm, to lessen vibration and blurred image.
There are solutions other than those billet extenders : I found exact chrome shaft additions for my Burgman mirrors; and an OEM mirror from a Honda motorcycle with a longer stem for my Forza scooter.
Stig