Sprocket Nuts 'n' Bolts

Morning all...

Work on the Mille is coming along nicely (although a little slower than I would like) - oil and filter changed, coolant changed, new tyres on, new battery on the Oximiser, next job is the chain and sprockets but I've a small problem...

I was going to change the rear sprocket at the weekend, while the wheels were off for new rubber but when I tried undoing the sprocket nuts the bolt turned with it, on 2/3 out of the 5 nuts.
I put my finger in the back of the sprocket carrier to see if there was an allen key head in there that I could use to hold the bolts but it was just a flat surface.

Is there a trick to getting these undone?

My plan was to give them a squirt of WD-40 every night in the hope that they'd glide off when I get round to having another go next weekend but failing that I'll have to take them to a mate's garage and get him to blast them with the impact wrench and then just hope that I can tighten them back up with the new sprocket, without having the same issues.

Any advice / guidance much appreciated.

Rob

Ah, I think I get what you're saying...

So with the rear wheel disc side down on the floor, I should be able to remove the whole sprocket-carrier as one, without undoing any sort of fixings?
And then when I've done that, I can take the cush drive rubbers off the pins to reveal the 'edges' I can get a spanner on while I undo the nuts from the other side?

This is all new to me - I'm used to sprockets that are 'hard fixed' to the rims on a motocross bike.

Excellent, thanks all - looking forward to cracking on with that next weekend!!