Steering stem nut question - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 12 (permalink) Old 04-25-2016, 07:53 AM Thread Starter
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Steering stem nut question

I bought a MCL stem nut to hook up my phone/GPS but wondering any technique torque it down. My buddy said that the 36mm nut is compressing the bearings and I should not mess with that. I've watched a video and the guy was just torque it down and some said torq it while you holding the handlebar in the middle. So what's the right way to do it?
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post #2 of 12 (permalink) Old 04-25-2016, 08:03 AM
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The bearings are actually compressed by a castellated nut below the triple tree, with a rubber gasket, then another castellated nut. The 36 mm nut is to hold the triple tree top on the steering stem and is torqued to a whopping 85 lbs-ft. If you're just replacing that nut, it's simple enough.

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post #3 of 12 (permalink) Old 04-25-2016, 09:19 AM
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Turn steering all the way to the right so it is against the stop then torque to to spec (85 ft lbs)

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post #4 of 12 (permalink) Old 04-25-2016, 10:07 AM
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Yamaha has a specific way of tightening the bearing, loosening it, then tightening it to final spec. This seats everything in a way that a single bash won't. Then the top nut.

If you're taking off the top nut, now is the time to service the head bearing (clean and lube without removing the bearings).

http://www.fjr-tips.org/maint/shb/shb.html

(summary of service steps table)

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Last edited by bounce; 04-25-2016 at 10:09 AM.
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post #5 of 12 (permalink) Old 04-25-2016, 11:59 AM
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As stated by Ray. The top nut has nothing to do with steering head bearing preload. R&R the top nut all you want. Just make sure it is tight when you are done.

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post #6 of 12 (permalink) Old 04-25-2016, 02:15 PM Thread Starter
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I think no need to clean and lube the bearing bike is new I'm doing the first oil change today and then I'll deal with the stem nut. Thanks for the info.
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post #7 of 12 (permalink) Old 04-25-2016, 08:29 PM
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Gotcha. Sorry, I didn't see it was new. But the page has good info for whatever level you want to dig into.

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post #8 of 12 (permalink) Old 04-25-2016, 11:35 PM
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Just make sure to use a torque wrench in the process. A digital reading would work better.
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post #9 of 12 (permalink) Old 04-26-2016, 12:53 PM
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I changed the top nut so I could put a gps on my 2014 FJR. I had a 36mm 12 point socket and it seemed to fit a little sloppy so I read about someone's suggestion which involved putting a piece of ducktape around the inside of the socket and that worked really well. Also helped prevent the socket from slipping on the nut and causing marring or marks if that makes sense. Just thought I would pass it on.
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post #10 of 12 (permalink) Old 04-26-2016, 10:42 PM
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Yes the duct tape can help a lot.
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