Kuryakyn 1413 Mirror Adapters for Yamaha, Ducati & Pan America
One side has reversed thread as is custom on all Yamaha mirror applications. This adapter set allows you to mount Harley and universal style mirrors on any Yamaha Motorcycle.
Thread specs:
M10 - 1.25 with one side reversed (left hand) thread.
5/16 - 18 both regular right hand threads