Are you installing a large fuel tank on your bike? You might need to relocate your front OEM or aftermarket turn signals to prevent them from hitting the tank at full turn of the handlebar.
 
Simple and lightweight,  this pair doesn't require additional hardware to bolt-on your existing bracket but simply replace it.
 
They work with any turn signals with a stem of 10mm (standard) or less and provide about 1/2" fore/aft adjustment.
 
Depending on your bike, you might also want to consider the Z-shape Turn Signal Relocation Bracket.