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Stripped rear brake master cylidner mounting bolts!!

4117 Views 41 Replies 11 Participants Last post by  Veefer97
I have an 06 gixxer k6 and I stripped the shit out of these bolts trying to get them off:

They're only supposed to be torqued to 7 ft-lb per the service manual. But with their thread lock and the fact that they haven't been touched since mfg of this motorcycle they're practically welded in there.

They have a 4mm hex head which is tiny and didn't stand a chance with the force to get these off. I rounded the hole and the hex grip is gone.

Now I dremeled a nice slit to fit a flathead screw driver, but these fuckers won't budge. The flathead is stripping the slit and I can't get any leverage. They're mangled now and I think it's time for a screw extraction.

So 3 questions:

1) Does anyone have the size spec of these screw threads (width, length & thread)? Specifically the width so I know what size extractor bit to use.

2) Do you agree that it's time for a screw extract? What product is best and where to buy? EZ out? Home Depot? Auto store?

3) Extra opinions on this matter

:comp FUUUUUUUUUCK! :comp
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1 - 5 of 42 Posts
Get a miniature butane torch and carefully heat the head. Thread locker will loose its hold when heat is applied.

I also vote easy out, chisel might be to much I think.
Red thread lock needs heat to properly remove.
Absolutely does.

Do you have one more to get out?

I still vote you get a pocket butane torch from HD and gently heat it before turning it.
I can tell from your reply that you have never used such a device. It does not damage the screw if used properly.
The bolt looks like shit and reinstalling it damaged wont be good for future removal. I would use another. Structurally it might be OK but functionally its going to be pita.
The OP asked if the impact driver damages the bolt. Your reply was "Absolutely does". Well you are wrong as countles peolple have used this tool and did not damage the bolts
OH impact driver.

My bad. I was looking at the mangled mess caused by the chisel and thought he was going to reuse that.
1 - 5 of 42 Posts
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