Which steering stem wrench is this? - Page 2 - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #11 of 69 (permalink) Old 02-26-2018, 06:02 PM
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Why do think so? The torque applied to the nut is the same as the torque wrench setting if you follow the procedure. A small difference in length will not matter and neither would torquing directly over the nut.

I'm not sure why Yamaha specifies that tool, it is more problematic than the convenience it provides, which I also do not see.

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post #12 of 69 (permalink) Old 02-26-2018, 06:15 PM
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The torque specs would be different than what Yamaha recommends because that's right over the nut and the tool I have is a couple of inches away, no?
Yamaha's torque specification would come from the setting that they use on an air driven power tool in the factory. I am sure that piece of junk spanner has never been used by anyone at Yamaha, and that they have never taken leverage affects into account.

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post #13 of 69 (permalink) Old 02-26-2018, 06:21 PM
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Forum Member Kaleria and youtube twowheelobsession has the tool. They too believe the wrench is required and that the applied torque is affected by the tool.

Anyway, they might respond with a dimension if you PM them.

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post #14 of 69 (permalink) Old 02-26-2018, 06:48 PM Thread Starter
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Yamaha's torque specification would come from the setting that they use on an air driven power tool in the factory. I am sure that piece of junk spanner has never been used by anyone at Yamaha, and that they have never taken leverage affects into account.
That's the one recommended in the FSM.
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post #15 of 69 (permalink) Old 02-26-2018, 07:01 PM Thread Starter
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Here is an online calculator to play with. Enter 90 degrees and any length of offset tool (up to half the length of your torque wrench):

http://www.cncexpo.com/TorqueAdapter.aspx
I must be doing something wrong, Yamaha calls for what? ~37 to torque the bearings with the piece of junk spanner they specify to use. If you change the length of "E" (which would be the difference between the spanner and socket) the values are radically different.
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post #16 of 69 (permalink) Old 02-26-2018, 08:42 PM
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Are you following the procedure? The manual says to ensure the angle is 90 degrees.

It is important to do it right, and there is no question the manual and Yamaha's direction on that are surely right.

I personally do not understand why they specify that tool instead of a pin socket. It is too easy to get the torque wrong depending on how one holds the tool and wrench. Either way, you need some kind of tool, so it doesn't really matter if you buy their specified tool. Why go rogue and take a risk that a random someone might be misleading you...

My best guess on the center-center distance of their tool is very close to 3 inches. I got that by taking a photo of the tool and scaling the dimensions based on the diameter of the nut.

I attached an image of that website's results for various lengths of E. I always get the same results until E goes over 50% of the torque wrench length. There is an inflection point there, I bet...
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post #17 of 69 (permalink) Old 02-26-2018, 09:15 PM Thread Starter
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Are you following the procedure? The manual says to ensure the angle is 90 degrees.

It is important to do it right, and there is no question the manual and Yamaha's direction on that are surely right.

I personally do not understand why they specify that tool instead of a pin socket. It is too easy to get the torque wrong depending on how one holds the tool and wrench. Either way, you need some kind of tool, so it doesn't really matter if you buy their specified tool. Why go rogue and take a risk that a random someone might be misleading you...

My best guess on the center-center distance of their tool is very close to 3 inches. I got that by taking a photo of the tool and scaling the dimensions based on the diameter of the nut.

I attached an image of that website's results for various lengths of E. I always get the same results until E goes over 50% of the torque wrench length. There is an inflection point there, I bet...
Excellent thank you.
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post #18 of 69 (permalink) Old 02-26-2018, 11:05 PM
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Anyone is free to have any opinion they like. Me - I just use the right tools, follow the book and enjoy my bikes
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Ditch and passx like this.

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post #19 of 69 (permalink) Old 02-26-2018, 11:50 PM Thread Starter
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Anyone is free to have any opinion they like. Me - I just use the right tools, follow the book and enjoy my bikes
Thank you Sir, appears we have essentially the same tool.
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post #20 of 69 (permalink) Old 02-27-2018, 12:54 AM
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Math and engineering are not generally opinions, although I once learned a corporate lesson on how 3-1=4.

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