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How to correctly adjust motorcycle mirrors

Motorcycle mirrors
Triumph aftermarket mirrors on my old T100

Some people don’t think they need motorcycle mirrors because they are going faster than the rest of the traffic.

In fact, in some South East Asian countries where mirrors are mandatory but never used, riders wind them in, facing forwards!

That seems to work in those countries where everyone travels slowly and traffic flows like water. However, in western countries, most motorcycle accidents are rear-enders, so it’s a pretty good idea to make sure your mirrors are adjusted properly.

The actual physical adjustment of mirror arms varies with mirror types. The most common is the two nuts which lock against each other. You will need a spanner or wrench to make the adjustment.

First, set the mirrors in their middle position at the end of the arm, so you have maximum fine-tuning movement when the mirror arms are secured.

Next, loosen off the bolts with the spanner, leaving a gap between the two. If they are chromed, use a piece of paper or rag between the bolt and spanner so it doesn’t scuff the chrome.

Now, sit on your bike in the riding position to adjust the mirrors. If you have a centre stand, use that. If not, get someone to hold you, or put the bike close to a wall and hold the bike vertical with your hand.

It is now time to adjust the mirror arms.

Bikes are different from cars which have wing mirrors and a central mirror. If adjusted correctly, drivers should have complete rear coverage without any blind spots. However, motorcycle mirrors don’t have a central mirror and often have big blind spots, so always do shoulder checks.

Motorcycle mirrors

The best position for your motorcycle mirrors will always be a compromise. You either see what’s behind you, what’s behind and to one side of your bike, or what’s on either side of you, but not what’s behind.

If you are in traffic, you should know what is behind you and what is in the right lane (or left lane in the US) as this is where passing vehicles will appear.

Therefore, my advice is to set your left mirror (right for US) to see what is behind you and set the other mirror for what is in your rear-three-quarters vision.

With your mirrors in the correct position, finger-tighten the lower bolt, then wind in the outer bolt with your fingers. If you are sure it’s right, you can tighten the outside bolt with a spanner. Don’t over-tighten.

If you don’t have a spanner, you can adjust the mirrors slightly shallower on the left and wider on the right, then just turn the mirror clockwise to the correct position which will tighten the nuts. This can take some trial and error, but it’s do-able.

Adjustment of the mirror on the end of the arm will fine-tune the position.

Always shoulder check before changing lanes or turning, but be especially aware that you will have a blind spot on the left (right in US).

If you are riding off road and frequently standing up, tilt your left (right in US) mirror upwards so you can see who’s behind you.

If your mirrors vibrate and all you can see if a blur, buy a thick rubber washer, or get specialised vibration isolators from your dealer and fit them between the mirror mount and the mirror bar.

  • How do you set your mirrors? Tell us your tips in the “Leave a reply” section below. 
  1. hey,

    thanks for the tips.
    One thing I wanted to ask, what do you mean by “rear three-quarters vision”?
    thanks for clarifying this.

    1. Hi Don,
      Sorry, I should have explained.
      I mean the blind spot behind and to the side, not directly behind you and not right beside, but in between.
      Does that make more sense.

  2. I know this is a late comment coming months after the article, but it’s a timeless article, so here goes.

    I mainly ride in Sydney traffic but on my bike the mirror arms aren’t quite wide/long enough so I always have my arms filling the inside 25% of the mirror. For $3 at a car accessory place I bought a pair of rotatable, stick-on, circular wide angle mirrors (about 50mm diameter and with an angled back) and stuck them on the inside part of the mirror where all I could was my arms anyway.

    They work brilliantly and show me the next lane from behind me right up to beside me where the car has entered my peripheral vision – I can see his front wheel without turning my head and his back wheel in my mirror. The outer 2/3 of the mirror is still usable to give the normal view and I’ve lost the view of my arms and gained a complete lack of blindspots. They are big enough to see cars in without having to concentrate for seconds at a time. Nothing beats a headcheck but a quick flick of my eyes every few seconds lets me keep aware of whats around me.

    I would now never own a bike without a pair of wide angle stickons on the mirrors.

  3. An important thing, i believe, is “the Art of Reading Mirrors”. Train yourself to extract the maximum information from as quick a look as possible. Trying to work out what the hell your looking at in a tiny 3inch window can take your sight and your brain away from what’s about to hit you from in front/side. Frequent very quick looks at the mirrors will have you aware of the scenario behind and any change will stand out & be noticed quicker.

  4. Our Honda STs mirrors are similar to car mirrors in appearance and at the same height and in another topic make filtering little difficult.

    Once the mirrors were aligned to suit me for everyday use I added some flat round wide angle mirrors which gives me a view of any vehicle on each side of me for when I’m in traffic.

    I can just see the trailer when I look in either mirror and at night the LH rear clearance light is visible.

  5. Err… Not sure where Mark Hinchliffe got his info, but according to “Motorcycle Accident Cause Factors and Identification of Countermeasures” (a.k.a. the “Hurt Report” – the most comprehensive motorcycle crash study ever conducted worldwide to date), only 3.5% of motorcycle crashes occur from being rear-ended. The most common collision with another vehicle is the left-turning vehicle entering the motorcyclist’s right-of-way. The most common single-vehicle motorcycle crashes occur in curves, with the motorcycle running wide and onto the shoulder of the road.

    1. Yeah, this.

      Mirrors are vital but I find them most useful to stop you changing lane into another vehicle. I wouldn’t call that accident being rear ended and it would be entirely the rider’s fault. I like knowing what’s behind me, but in city traffic I absolutely need to know what’s approaching in either lane beside me. As such my blind spot is behind me in normal riding. To look directly behind me I have to lean over to my right a little and move my left elbow out of the mirror view. Sounds more awkward than it is, takes a second and is something I do often enough when moving in free flowing traffic. I can always see both lanes behind me and I will always perform a shoulder check just to be certain nothing has snuck past my mirror and is just pulling alongside me. I’ve had a few scooters and small cars nestle there before now, something to be aware of.

  6. What can I do if the arms on my mirrors are too short so all I see is mostly my own arms in the mirrors blocking the view of almost everything on the road behind me?

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