Standard to Metric Adapter Bolts for Mirrors. Use Harley Mirrors on Honda Yamaha Kawasaki Suzuki Standard to Metric Chrome Motorcycle Mirror Adaptor Kit Ever wondered how you can install those custom mirrors made for Harley-Davidson on your metric bike? Now you can. Just use these chrome adaptors with standard thread on one side to fit the Harley style mirrors and metric thread on the other to fit your bike. Kit consists of two chrome adaptors. Honda, Kawasaki and Suzuki riders would need adaptors with right hand thread, Yamaha riders need one left hand and one right hand thread adaptors. Please specify the make of your bike, or the two right hand thread adaptors will be send. *Product ID = 3843