adding acessories - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 17 (permalink) Old 08-03-2020, 12:03 PM Thread Starter
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adding acessories

I have a 2020 1300 and would like to use a magnetic mount on the aluminum 36 mm nut, by adding a magnet or steel washer under that steering nut. It looks like the flange on the nut is what is securing the steering stem. Is there room for either inside that nut? Also what is the torque spec. for the install? Thanks

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post #2 of 17 (permalink) Old 08-04-2020, 09:41 AM
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Won't be secure enough out in the wild. Too much jostling and such so that it's a matter of when instead of if it will let go. Better to get a threaded replacement nut to mount a Ram ball in.


There are others, but here's an example.


https://www.techmounts.com/uploads/d..._accessory.pdf
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post #3 of 17 (permalink) Old 08-05-2020, 08:31 AM Thread Starter
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Thanks for your reply. I have a new 36mm nut. A 1" fender washer inside the cap holds the mag mount quite well. The torque value is 85 ft. #, so I'm gonna put some clay in the inside and torque the nut down to see if there is room for a rare earth magnet disc. I can weld a riser on that nut similar to a ram mount but would prefer not to have a peg in my face. Your option may be the best alternative.

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post #4 of 17 (permalink) Old 08-05-2020, 08:45 AM
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Anything "inside" the nut will affect how the torque values affect the "interface". The problem is that if you lube threads then you have to lower the tq from the recommended by some unknown amount. With clay, would you tq less or more? How could you know which would be right?


Is the magnet shielded from your electronics? Rare earth magnets are strong enough to flip bits inside electronics (or degauss them).
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post #5 of 17 (permalink) Old 08-13-2020, 09:04 AM Thread Starter
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After removing the nut and measuring the steering stem and nut there is room for a .125 solid steel disc. The garmin magnetic mount is quite good but does fall short. The dealer does not think it will have any negative affect using a rare earth magnet. I would be on my own if it does. My next move will be welding a threaded aluminum short piece to the nut.
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post #6 of 17 (permalink) Old 08-13-2020, 01:55 PM
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Garage
This is all a great idea. I'm going to remove the OEM stem nut (36mm socket off eBay for $10) and drill a hole in the center to mount a 17mm ball for my Garmin. I'll use a SS bolt and probably a 3" piece of SS tubing to get the unit up high enough to fit between my bars. Or I might bend the rig towards the gas tank. Whatever keeps the mounting stem the shortest to reduce the potential for vibration. Much better than the mess I've got on there now for sure. Any feedback would be welcome.
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post #7 of 17 (permalink) Old 08-14-2020, 10:46 AM
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The magnetic field strength decreases at a square of the distance... unless it's got some ferrous metal touching both the magnet, the mount, and the device to facility conduction. The stronger the field, the farther from the magnet the [thing with electronics in it] should be.


Might I suggest you test the magnet touching something other than your GPS (but similar in guts) that you don't mind bricking before going out and depending on it during a trip. I suspect (but don't know) that the strength of rare earth magnets in close proximity to a GPS might affect it's radio reception (like jamming the signal).
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Last edited by bounce; 08-16-2020 at 09:58 AM.
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post #8 of 17 (permalink) Old 08-16-2020, 11:16 AM Thread Starter
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The magnetic strenght did not increase from the galvanized fender washer to the .125 metal disc. What did work very well was, I drilled and tapped the 36mm nut and an aluminum round stock 1" in diameter and about .800 long. I modified the garmin gps to accept 1/4-20 threaded rod. My GPS sits low and is not in the way. Pictures to follow. The hole in the nut should be drilled in a lathe to assure the centering of the gps screen.

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post #9 of 17 (permalink) Old 08-16-2020, 12:11 PM Thread Starter
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It might be better to use 1/4-28 thread.
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File Type: jpg FJR 034.jpg (130.4 KB, 17 views)
File Type: jpg FJR 032.jpg (137.5 KB, 19 views)

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post #10 of 17 (permalink) Old 08-16-2020, 12:17 PM Thread Starter
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snap on bracket for garmin
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File Type: jpg FJR 029.jpg (112.1 KB, 19 views)
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Last edited by blast; 08-16-2020 at 12:27 PM.
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