What size wrench is needed for a 125cc motorcycle rearview mirror?

2 Answers
ElizabethDella
07/25/25 2:00am
Generally, a 14mm open-end wrench or an adjustable wrench can be used to tighten motorcycle rearview mirrors. Tools to prepare: Different motorcycle models have different adjustment methods for rearview mirrors. Except for sports bikes, most common motorcycle rearview mirrors are fixed to the handlebars with two nuts. Therefore, it is essential to carry a small toolkit, at the very least, a suitable wrench. Motorcycles only have side rearview mirrors: Unlike cars, motorcycles do not have an interior rearview mirror—only side mirrors. As a result, blind spots will inevitably exist regardless of how you adjust them.
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ClaytonLynn
08/10/25 4:23pm
Regarding the wrench size for 125cc motorcycle mirrors, I've been riding for years and found that most models require either an 8mm or 10mm hex key. For example, small-displacement bikes from Honda or Yamaha typically have mirror bolt heads within this range. You can DIY by first measuring the bolt diameter with calipers or a regular ruler to confirm the exact size. I recommend getting a set of metric hex wrenches of medium-to-high quality – cheap ones tend to strip bolts. When installing mirrors, don't overtighten; just secure them properly to avoid thread damage. Mirror maintenance is crucial – regular inspection and cleaning ensure clear visibility and reduce accident risks. If DIY isn't your thing, a bike shop can handle it for just a few bucks – quick and safe. As a side note, always glance at your mirrors before riding; making it a habit helps avoid blind spot dangers.
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