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I'd just drill the head off and be done with it. If you couldn't get it to budge with a screwdriver in the slot, I'll bet an eze out won't get it, either. Once you drill the head off and get it apart, you can get some vise grips on the screw.
John, I'm in CT, but thanks for the offer. I don't understand how removing the screw head will help me - this is a threaded "clamshell" assembly, so I need to back it out of the rear piece (if that makes and sense at all) to get the clamshell apart. Somehow I have to back this sucker out or (I would think) cut the whole damned thing off. If that's the case, I'm gonna use the stock bar until I sell the bike, not worth the hassle and expense. Thanks
And make that a left-handed bit if you can find one.Rich A
As most have suggested, drill the head off. Also, I was hoping you'd have a chance to try this trick I saw the other day. I haven't tried it myself, so not sure if it actually works for non-wood type screws (it should)The rubberband trick:https://www.youtube.com/watch?v=q61IrNfRstI
I learned this recently, and didn't believe it until I tried it and it worked like a charm. by all means try kroil first, but then...put a dab of valve grinding compound on the tip of the screw driver. will absolutely make the tip grab the head of the fastener...