riteristrob
Expert Class
Posts: 109
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posted February 12, 2008 09:47 PM
Front Rotor Bolt Broken - Need Advice
When taking off a front rotor on my zx12r I stripped the head of the bolt. I drilled it out for a #3 screw extractor and broke the screw extractor off in the bolt. I used a tungsten carbide cutter on a dremel tool and was able to cut away the piece of extractor.
Decided to go to a #4 screw extractor. The drill size is 1/4 inch, which is very close to the size of the bolt minus the threads. Unfortunately, my hole wasn't straight and I caught the threads in the wheel with the 1/4 inch drill bit.
So my questions.........
Should I take the wheel to a machine shop and have a heli coil insert put in, or buy a new wheel?
Does anyone have experience with a heli coil in a wheel? Cost? Any down sides?
Does anyone have a straight front wheel for sale for an 02 ZX12R?
  
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shane661
Needs a life
Posts: 11494
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posted February 13, 2008 03:23 AM
 Edited By: shane661 on 13 Feb 2008 03:24
For one rotor bolt I don't think a hel-coil will be a problem. They aren't torqued very high, and you will be using loctite anyway. I do drag and lsr racing as a hobby, and a heli-coil would be sufficient for me. Just my .02.
Shane
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woppî
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Posts:
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posted February 13, 2008 03:31 AM
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quote:
For one rotor bolt I don't think a hel-coil will be a problem. They aren't torqued very high, and you will be using loctite anyway. I do drag and lsr racing as a hobby, and a heli-coil would be sufficient for me. Just my .02.
Shane
yes, i think so to !!
woppi
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riteristrob
Expert Class
Posts: 109
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posted February 13, 2008 05:45 AM
Thanks fellas. I guess I'll call a machine shop today.
btw I forgot to mention I need a rotor bolt too.
I'll send $5 for a clean undamaged rotor bolt.
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KZScott
Needs a life
high on speed
Posts: 7235
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posted February 13, 2008 06:51 AM
the wheel may need to be balanced afterwards, but you probly wont notice anything
____________
01 ZX-12R 8.84 @ 156.3 no bars, DOT tires. Pump Gas, NA.... turbo 8.47 @ 164.
00 ZX-12R 8.62 @ 165.2 no bars, slicks, Pump Gas, 55 shot.... turbo 8.32 @173
00 ZX-12R Fastest NA Kawasaki in the world 1: 222.046 1.5: 226.390 Loring AFB
00 ZX-12R street turbo 1: 227.9 1.5: 234.1 Loring AFB
00 ZX-12R LSR turbo 1: 263.1 1.5: 266.5 Loring AFB Worlds fastest ZX-12R
CMG Racing RCC Turbos
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CrotchRocket
Moderator
Bracket Racing with Betsy
Posts: 8038
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posted February 13, 2008 09:00 AM
Next time heat the bolts up with a small torch, heat gun...If not then loosenbolt a little then tighten then loosen a little more and keep doing it that way until its out...Takes time that way but at least you wont break or strip the bolts
____________
Jason Miller StreetBike Seminars
*****DragRacers do it better, because they dont cut Corners*****
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riteristrob
Expert Class
Posts: 109
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posted February 13, 2008 11:39 AM
Good advice CR thanks!
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stuart racing
Zone Head
N.H.R.A . Dragracing.
Posts: 999
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posted February 13, 2008 12:56 PM
I have a blue 02 wheel if ya need one.....
____________
Life in the Fast Lane..........
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chuck762
Novice Class
Posts: 47
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posted February 14, 2008 04:50 AM
Get a time-sert installed. Much better than a helicoil.
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zx12mark
Pro
Posts: 1654
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posted February 14, 2008 01:34 PM
you will be fine with a new insert.
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riteristrob
Expert Class
Posts: 109
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posted February 15, 2008 09:14 AM
Stuart Racing - I'll let you know in a few days about the blue 02 wheel. Just in case I do need it, how much are you asking?
I found a local shop that said they could burn out the bolt with an EDM machine. I love science. He said if the threads in the wheel were damaged then I could go with an insert with no problem. We'll see.
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riteristrob
Expert Class
Posts: 109
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posted February 19, 2008 07:07 AM
I had a local shop use an EDM machine to burn out the old bolt. The threads in the bolt hole were slightly buggered at the very top, but the bolt still grabs 90% of good solid threads.
Now to finish my polishing project.
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