Napoleon mirror experiment - Triumph Forum: Triumph Rat Motorcycle Forums
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post #1 of 5 (permalink) Old 02-13-2017, 02:40 AM Thread Starter
Grand Prix 500
Main Motorcycle: Bonneville T100
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Napoleon mirror experiment

I've been tired of looking at my shoulders in the stock mirrors since I've had my '12 T100. I had been reluctant to try bar ends mainly due to the rather tight quarters I find myself in lane splitting the 405 freeway in Orange and L.A. counties during rush hour. Anyone who does as well knows what I'm talking about. However, my new job has me spending less time on the freeway. So, looking at options, I like the OEM chrome bar ends, but didn't want to pay the OEM price.

Looking at some posts about people adapting Napoleon mirrors to the OEM bars, I figured I'd try. I bought one mirror to experiment with, knowing I'd need to modify it a bit. If I didn't like the outcome, I'd only be out the price of one mirror.

It was easier than I thought. Using the threaded bar end weight that the end cap screws into, I got a 50mm long M5 screw from my local (very well stocked) hardware store. Since a 5m screw is much narrower than the larger screw that came with the mirror, I also got an aluminum sleeve that fits over the M5 screw and inside the mirror housing to take up the gap around the smaller screw.

The rubber plug that compresses and locks the mirror in place on a normal handlebar needs to be trimmed to fit inside the smaller space created by the bar end weight. I trimmed a bit and screwed in the mirror, but the end of the rubber part stuck out of the end of the bar and "mushroomed" out. I kept trimming a bit more until the whole rubber part stayed inside the bar with the screw fully tightened. In total, I probably sliced off about 3/8" off of the end of the rubber.

The 5M screw isn't as big around as the screw that the mirror comes with, but it tightened up very securely. I kept the factory mirror in place on the same side, and went for a test ride to compare the field of view from the OEM mirror and the Napoleon. The Napoleon has a bit of a convex view, and gives a much wider field of view. I was mainly looking at how clearly I could see cars approaching from behind at red lights.

On the freeway, there's a bit of vibration above 70 mph or so that blurs the cars behind, but not enough to be a bother. I ordered another mirror for the other side and took off the factory mirror. I know there are some pricey aluminum mirror plugs available for the factory mirror holes, but a rubber stopper works very well. I got one that has a diameter at the wide end that matches the diameter of the hole opening. Sprayed with rubber dressing (Armor All), and worked it into the hole until it sits flush with the hole opening. 30 cents each, and it looks perfect.

Eventually, I'll probably drill and tap the bar end weights for the larger screws that the mirrors come with. Maybe that will take care of the vibration.
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2012 Bonneville T100
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post #2 of 5 (permalink) Old 02-13-2017, 02:45 PM
DrX
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Napoleon mirror experiment

Don't cut the rubber grommets with the longer bolts it will compress into handle bar ends and act as a rubber isolator for vibration. I'm pretty sure your going to get some vibration over 70 with any mirror on these bikes. It seems like a lot of extra work to re-tap for a larger size hole when all you need are the longer bolts. My mirror after 8 years or so much better than stock.Napoleon mirror experiment-imageuploadedbymo-free1487015053.681138.jpg


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Last edited by DrX; 02-13-2017 at 03:32 PM.
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post #3 of 5 (permalink) Old 02-13-2017, 03:28 PM
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I drilled out and tap the plug for the Napoleon mirrors on all my bikes.

They work great and I never have an issue splitting traffic up here in the Sacramento area.

You can adjust them up and in anyway if you need to.

The other thing I've noticed because of the weight and formidability of the Napoleon mirrors, they completely cut the buzz out of the bars I experienced before mounting them. That a benefit I never expected. They are a very well made mirror, better then any other I've ever used. Price ain't bad on them either, considering how well made they are.

I've ordered a couple sets from Rabers in San Jose.
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post #4 of 5 (permalink) Old 02-13-2017, 04:07 PM Thread Starter
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Thanks guys. I'll see how it goes with the smaller screws. Rode with my one Napoleon to work today and really enjoyed the added view. Looking forward to getting the other side.
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post #5 of 5 (permalink) Old 02-13-2017, 04:12 PM
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Quote:
Originally Posted by Gone in 60 View Post
Thanks guys. I'll see how it goes with the smaller screws. Rode with my one Napoleon to work today and really enjoyed the added view. Looking forward to getting the other side.
I had a thruxton one time and used the smaller stock screws only longer, like what you are doing.

I have found with the heavier screws they mirrors are more clear.
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