Thanks for this, a job that I'm dreading this winter ... BTW do you know the torque value to refit the offending nut?
Regs
Simon
Don't dread it. It is simple. The chain is more fiddly to fit than the sprockets. Especially if you use an o-ring chain, you have to squish the O-Rings with the side plate before the spring clip will go on..... easy enough with a G-clamp and a nut just bigger than the pins....screw the clamp up using the nut over the pin. Side plate squeezes in, but you need to do each pin in turn, unless you can find two nuts and a bit of something to bridge them... I did them in turn, then the spring clip just pops on easily.
Sprockets - rear is dead easy, just undo the 6x 10mm nuts.
Front sprocket - put bike in gear, stand on back brake as well to take some pressure off the gearbox and undo the sprocket nut. It isn't that tight.
Order of service:
Sprocket nut.
Chain spring link clip off and split chain, take off by feeding through.
Rear wheel out.
Rear sprocket nuts.
Front sprocket on - do nut up mostly.
Feed chain through front sprocket. leaving dangling.
Rear sprocket onto wheel.
Fit rear wheel.
Fit chain fully and do spring clip.
Fully tighten front sprocket nut using rear brake to take pressure off the gearbox.