Problem with front wheel and rotor - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 10 (permalink) Old 01-15-2016, 01:28 PM Thread Starter
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Problem with front wheel and rotor

When I was bolting my OEM rotors on to my front wheel, I have one bolt hole in the wheel that's apparently stripped. I took the rotor back off and chased all the threads with a die. Cleaned up the bolts with a tap too.
But I still have that one bolt that won't tighten up past a couple lb-ft. of torque.
I mounted the wheel back to the bike, and measured for any run-out of the discs.
The other one is deadnuts straight.
The rotor with the problem bolt hole measures 0.59mm's of run-out.
Using the brace on my Pitbull, I secured my digital caliper, then spun the wheel. It's straight, straight, straight, then takes a tiny dip inwards, then back to straight.

My idea is to fix the bolt hole in the wheel with a helicoil, retighten to spec, then measure for run-out again.

I looked in the service manual for specs on rotor/disc runout, couldn't find any. Did I miss it, or is there even such a spec?

If it's still out after the helicoil fix, will this 1/2 mm of run-out cause me problems?

John, 2000 RC51 #000100

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post #2 of 10 (permalink) Old 01-15-2016, 04:55 PM
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Chances are it will cause a parasitic drag on the wheel.

Helicoil should fix the issue.

-2001 Honda RC51 sp1 " Slightly Modified "
-2001 Honda 929RR Erion Edition
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post #3 of 10 (permalink) Old 01-15-2016, 04:57 PM
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Honda service manual does list a runout spec of .30 mm or .012 inches. It appears that is for both the SP1 and SP2 rotors which are 4.5mm and 5.0mm thick.
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post #4 of 10 (permalink) Old 01-15-2016, 05:48 PM
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I have an OEM front wheel that is doing absolutely nothing in the garage...
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post #5 of 10 (permalink) Old 01-16-2016, 10:36 AM
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Here I was going to make the recommendation that you buy some new candy for your baby....

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post #6 of 10 (permalink) Old 01-16-2016, 11:40 AM
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Use a time sert rather than a helicoil if you can get one
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post #7 of 10 (permalink) Old 01-16-2016, 08:35 PM
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I also have a front/rear wheel sitting around. FYI.

https://www.rc51forums.com/forums/41-...light-f-s.html <-- disregard the thread title. I might hold onto them, not sure, for now they're F/S.

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post #8 of 10 (permalink) Old 01-17-2016, 02:06 PM Thread Starter
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Well, I WOULD like to get new rims, but won't have the coin for that for a couple months or so. I've always prefered the SP2 rims over the SP1's.

A time sert, huh? Never heard of that, I'll look into it.
The one time I tried to use a helicoil, I remember having a bit of trouble installing it right.

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post #9 of 10 (permalink) Old 01-17-2016, 02:38 PM
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post #10 of 10 (permalink) Old 01-17-2016, 03:42 PM Thread Starter
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That kit looks like the cats meow.
But at $150 for the M6x1.00, gunna have to think about that...
Thanks for the link @dansp1 .

John, 2000 RC51 #000100

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