I have the 1100 on the workbench and am doing all sorts of jobs, one of which is an oil change.  I drained the oil without any problems and replaced the sump plug with a new stainless steel one that holds a magnet.  I then went to remove the three cap head Allen screws that secure the triangular oil filter cover, and to my horror my Allen wrench rounded out one of the screws.

Various methods of tackling the problem went through my mind, but none seemed easy.  I eventually used a 1/4" drive ratchet drive with an appropriate Allen bit.  I inserted it into the screw, and then tilted the ratchet in a bid to wedge the bit into the screw's socket.  The use of the ratchet enabled me to keep the angle of the 'tilt' constant as I applied pressure to undo things.

Luckily, the extra bit of grip was enough to free off the screw, and out it came.  Obviously new stainless steel screws went back in, after a coat of Coppaslip.  Once bitten - twice shy.

Next time when something rounds out on you, try applying pressure at something than a straight 90 degrees to the axis of the screw - who knows, it might just work for you too?

Not sure that I would use coppaslip on those bolts, should one come out it would cause a huge mess and could cost an engine.

Thanks, X; good tip; never thought of the 'wedge/lever' method. 

I tend to use a dab o' high-temp grease whenever I'm interfacing stainless steel w/ aluminum, as the two metals tend towards fusing together after awhile, esp. under high heat and moisture (read: road muck).

You make a very valid point bikerboy.  The new sump plug was drilled for lockwiring, so I could simply  get out a suitable bit and drill the heads of the Allen screws, and then loop everything together with a length of lockwire.  That way I'd be assured of easily removing the screws on subsequent oil changes, and not fret in the meantime about a total loss of lubricant.  Another job for the lengthening list.