Great round chrome mirror fits left or right side, multi adjustable, M8 /M10, 

will fit Triumph T140V/T160  right hand side as these have M8 thread in master cylinder,

have also fitted these on RH side(T140) By removing all the internal gubbings and using a long M8 or 5/16 cap screw 

along with a suitable spacer, same can be done with a T140E/D RH side,

"Please study the photo(s) as they form part of the description"