so pissed at myself right now.. Rack this up to inexperience..

'Loctite everything' people say.. Took a bracket off the top triple tree to reroute some wiring.. Went to (unnamed motorcycle store), hi you have loctite? Yep, here you go.. 'Oh this is red.. Permanent, I think I want the weaker stuff', 'nah mate, it's all the same, just use less of it'

Sigh.. I now have a rounded out Allen bolt (I didn't even crank it that hard).

Lesson learned.. What the hell do I do now? It's only a decorative bracket (hides the instrument wiring), but it's now half loose, cant get the bolt out or back in..

Some people.. Some people shouldn't attempt to wrench shit.. That would be me.

Depending on the thickness of the bolt you could use a file to file down two sides flat and use a socket. Apply heat (if you can) before trying to turn the fucker and MAKE SURE the socket you're using fits on snuggly, so you can't wobble it back and forth even slightly.

Otherwise I'd use heat and multi grips.

What the bonk man said, Or see if this may work. Get the next up closest size allen bit or torx bit that just starts to fit in the damaged hole and belt it in with a hammer. Then try and put heat on it if you can. Whilst it is hot, put a 1/4"socket on the bit and try to undo it. The heat will transfer and hopefully melt the loctite a wee bit so you can undo it. My 5cents.

Heat and multi grips, twist it a few times back and forward, loosen tighten bit by bit

Yes always before trying to undo bolts that have locktite on them you MUST heat the bolt up with a heat gun or hair dryer

You are not the idiot mate, the fuckwit that told you that they are the same is the idiot.
Very rarely will you need to use anything other than blue on your bike.
Pulley bolts are probably the only exception on my bike

most people don't have access to heat though and it sounds like there are wires there. the allen bolts are normally high tensile steel and are too hard to drill with a normal drill bit. they are easy to cut with a fine toothed hacksaw blade. what does it screw into Mr Mow?

One method i have used on broken bolts etc is to weld a nut on in the center with the mig the heat helps it come loose as well

Just carefully drill off the head of the Allen head. Remove the part, then heat the area that the bolt screws into with a paint stripper gun (electric, not flame) and remove what's left of bolt with good vice grips.
If you can't drill straight, that's gonna end in tears. Good luck, man.

+1 use an oversize Allan key by forcing it into the hole and the undo it

destroy the decorative bracket with a 9 inch grinder and then give yourself a good shake.

a bit off heat maybe a little more than a bit if you can & tap a metric or af next size up allen key into it or drill & tap out

 

Run a Hacksaw cut thru then use a flat screwdriver or impact driver depending on location

As a few others have said, try use the very next size key. I usually grab a hammer give it a light couple taps to get it securely into the rounded hole. Works almost every time.

Thanks guys, will try the slightly larger allen for starters..
Then.. well.. lets hope there isnt a then..!

Good luck, and don't come down on yourself.... it's called learning (albeit the hard way, but sometimes that's the best way!!)