2001 Daytona 955i Key Barrel - How To Remove?

They are security or shear bolts, designed so that they cannot be removed. As they reach the correct tightening torque the hex head shears off.
The only way to remove is drill a hole in the centre and use a stud extractor.
You may be lucky and be able to cut a slot in the remaining head and use a screwdriver.
Best of luck!

 

cut a slot with a dremmel tool

 

I drilled mine and they just came loose, perhaps I was just lucky

 

Hi Adam, the bolts are indeed shear bolts, when fitting them once they reach the correct torque the bolt head shears off to slow down any attempted theft, what you need to do is first use a centre punch to mark the centre of the bolt, then use an anti clockwise drill bit to go to a depth of approximately 8mm, then use an anti clockwise extractor, the shear bolts are thankfully not torqued high and come out fairly easily. You can get the correct drill bits and extractor from bikers toolbox, you will of course need a drill with a reverse motor capability, a lot of people use a conventional right hand drill bit and then wonder why they have difficulty removing studs etc. Ride safe all from an ageing Rocker.