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Stripped rear brake master cylidner mounting bolts!!

4119 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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The chisel got fucked up because it's a woodworking chisel. A cold chisel would be correct for this application.

p.s. What a goofy word "chisel".
My method is to first make sure the tool is set to lefty loosey, then seat it good in the screw and turn it to take out any slack, then give it a hard whack. It won't work well unless the screw you're attempting to remove is in something pretty solid.

The sharp/hard whack method is the key to breaking a lot of bolts/nuts loose regardless of the tool used. This is why impact wrenches work so well.

Cheers :beer
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