How do I know if these mirrors fit my bike?

If you're not sure, there are a few tips for you.

If you're not sure these fit, there are a few tips for you.How to measure mirror thread? The mirror threadMost big bike mirrors have 10mm standard / clock wise threadSome Yamaha/ Ducati have reversed/ anti clockwise thread and a standard / clockwise thread5/16 inch bolts are for Harley-Davidson only8mm are fore most scooters' mirrorsSome Yamaha have a reversed/ anti clockwise thread and a standard / clockwise threadCheck the bolt area of your bike and the bottom of the mirror stem to see if they fitCheck with your motorcycle dealer or Google for the correct mirror thread