broken bolt in the block!

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28 Apr 2006 21:19 #43562 by cary
broken bolt in the block! was created by cary
while taking off my sprocket cover for the first time (on my 82 1000) the long, skinny bolt on the top left broke off with about 1/16 - 1/8" still left outside the thread. In can't get the sprocket cover back on until thisis fixed, hence, no clutch and no ride.

Any suggestions as to how to fix this? I can't take any chances as this is stuck right in the block.

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28 Apr 2006 21:47 #43574 by Max2022
Replied by Max2022 on topic broken bolt in the block!
Take it to a mechanics shop. Usualy they drill it and retread the hole. I know I got a nice big 1/8 bolt broken off in my seat(Yes yes, 50lb/inch of torque will do that!), anyway my mechanics shop did it for free, cause I know the owner and mechanics, others will charge ya like $10 I think. It's about 30 minutes of labor.

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28 Apr 2006 22:58 #43579 by 77KZ650
Replied by 77KZ650 on topic broken bolt in the block!
I was reading awhile back on here about a product called alum. its supposed to dissovle steel but not aluminum, making it perfect for removing broken off bolts in aluminum, do a search....
Scott

07 MDP Rookie of the Year
01 ZX-12R street/drag bike. 8.97 @155.7 pump gas, dot tires, no bars, no power adders. top speed in the 1/4: 161MPH

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29 Apr 2006 04:32 #43591 by BEER
Replied by BEER on topic broken bolt in the block!
Take your bike to a machime shop and have them weld a nut to the broken bolt and they should be able to turn it out.

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29 Apr 2006 09:25 #43648 by dutchz
Replied by dutchz on topic broken bolt in the block!
There should be no need for redrilling straight away... The good news is the bolt is partly sticking out, so the threads on the inside aren't damaged (yet).
I like beer's suggestion on the welding trick, try that first. I would personally stay away from EZ-outs, because if they break off inside the bolt even a machine shop won't be able to drill out the bolt for you and rethread(ask me how I know) and the only thing left is EDM.

The long bottom bolt on my sprocket cover was broken when I got the bike, and I had no thread sticking out. After the EZ-out debacle I decided to try some left-hand drill bits and this worked great.
I soaked the bolt in PB Blaster and then used a center punch to mark the center of the bolt. I used a tiny left-hand bit to drill a shallow pilot hole (maybe 1/8). Then I grabbed a larger left-hand bit that was the same diameter as the bolt's core size, and it spun right out.
Hope this helps, good luck!

1974 Kawasaki Z1
Stock front hub and rear axle.

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29 Apr 2006 16:48 #43725 by cary
Replied by cary on topic broken bolt in the block!
After I figure out how to get the bike into my truck without it running, I will take it to a machine shop and get this handled... I'll go ahead and order a new set of bolts for putting it all back together.

On a side note, what flavor of loctite do you guys recommend for putting this all back together?

Anyone know a quick way of getting old gasket material of without damaging the aluminum?

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  • wireman
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29 Apr 2006 20:14 #43783 by wireman
Replied by wireman on topic broken bolt in the block!
you might want to have them run a botteming tap through the other holes while its in the shop.:whistle: is there a gasket on your sprocket cover?anyway try a razor blade to remove gaskets,blue locktight for bolts but clear fingernail polish works good in a pinch(dont ask me how i know):whistle: :woohoo:

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30 Apr 2006 17:10 #43985 by cary
Replied by cary on topic broken bolt in the block!
no, it's the alternator gasket that is hard to get off...

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  • wireman
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30 Apr 2006 18:44 #44012 by wireman
Replied by wireman on topic broken bolt in the block!
cary wrote:

no, it's the alternator gasket that is hard to get off...

ya had me wondering!:whistle: :woohoo:

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