Way Too Many Weights - Yamaha FJR Forum : Yamaha FJR Owners Forums
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post #1 of 47 (permalink) Old 09-22-2020, 03:15 PM Thread Starter
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Way Too Many Weights

Not FJR but big Ninja is close. Mounted tire for a friend this morning. 190/50-17, a size some might mount in FJR. Was shocked at how out of balance the new tire. Ultimately used (19) 7g weights.

Not thinking at the time, I should have offered the 180/55-17 T30 Evo I have not 5 ‘ away from my NoMar.

I think the owner will be talking warranty terms this afternoon.


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post #2 of 47 (permalink) Old 09-22-2020, 03:46 PM
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I don't mount tires, but does that tire have a painted dot where it is lightest? I know my Metzelers do, and the tech mounts them so that the dots are over the valve, to make the tire easier to balance.
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post #3 of 47 (permalink) Old 09-22-2020, 03:53 PM
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35+ yrs ago I was working in a Hon/Yam shop and I changed many tires.
If we had one that req'd an excessive amount of wts, we would break the bead, rotate the tire 180 degrees and try again.
Some tires had the red or yellow dot, some didn't....and rotating the tire didn't always improve things.

I enjoyed my years at that job (while in school) but knew it would never be a career... However, I did get pretty good at changing tires!
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post #4 of 47 (permalink) Old 09-22-2020, 03:56 PM Thread Starter
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Originally Posted by skippy344! View Post
I don't mount tires, but does that tire have a painted dot where it is lightest? I know my Metzelers do, and the tech mounts them so that the dots are over the valve, to make the tire easier to balance.
Looked, did not find any mark. New tire was wrapped in foil.

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post #5 of 47 (permalink) Old 09-22-2020, 04:00 PM Thread Starter
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Originally Posted by Mr. BR View Post
35+ yrs ago I was working in a Hon/Yam shop and I changed many tires.
If we had one that req'd an excessive amount of wts, we would break the bead, rotate the tire 180 degrees and try again.
Some tires had the red or yellow dot, some didn't....and rotating the tire didn't always improve things.

I enjoyed my years at that job (while in school) but knew it would never be a career... However, I did get pretty good at changing tires!
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I mounted the previous tire on this rim and used (2) 5g weights. Is not the rim which is out of balance. Did pop the bead and attempt to rotate. Was nasty enough to mount, T31 GT nasty (not a Bridgestone). Moved it a few inches. Balance moved a few inches.

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post #6 of 47 (permalink) Old 09-22-2020, 04:08 PM
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That's terrible. I would never do that to a friend.

I ALWAYS wash the rim first, and make it look as nice as possible so the weights can stick better.
Definitively would of taken the tire off and rotated it so there aren't as many weights on there.

Yep, reason why i don't let anybody mount my tires anymore. Also.... a 190/50 is a terrible size regardless of bike.
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post #7 of 47 (permalink) Old 09-22-2020, 05:23 PM Thread Starter
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That's terrible. I would never do that to a friend.

I ALWAYS wash the rim first, and make it look as nice as possible so the weights can stick better.
Rim wasnít that dirty, is dusty. I did wash the section before permanently affixing weights. In the video weights are temporarily held in place with clear shipping tape.

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Definitively would of taken the tire off and rotated it so there aren't as many weights on there.
Thatís fine, but when the rim is not out of balance it does nothing but create more work. Didn't balance the bare rim but no prior tire on this rim required more than a couple weights. Spinning the tire on rim will make no difference, not that I didnít try.

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post #8 of 47 (permalink) Old 09-22-2020, 05:33 PM
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TPMS system? That would take up 10-20 grams. But that far off, I would rotate the tire anyway, but you're right if the rim is in balance, then it won't matter.
I have had two front wheels that by themselves were out 50 grams right from the factory and clip-on weights right from Yamaha.
Kinda sounding like you got "one of those" tires, rare but sometimes life sucks. T31's are verrrry stiff, I get it if you don't want to take it off.
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post #9 of 47 (permalink) Old 09-22-2020, 08:21 PM Thread Starter
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It wasnít a T31 but equally stiff and 50 series.

Friend said, ďit was cheap.Ē

No TPMS.

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post #10 of 47 (permalink) Old 09-22-2020, 08:45 PM
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N4, as you probably already know, nothing you did, just a bad tire, sometimes it happens, he should be able to take it back and get a new one but Iíve found that sometimes itís just a bad batch, he may have to go with something different.
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