Cheers for all the comments guys, I've just got the larger Nut in the post and will be picking up the chain and sprockets tomorrow. Does anyone know of an easy 'how to' guide?
I'm guessing its as follows;
front sprocket cover and associated gubbins off,
Split the chain and remove,
slacken off the spocket nut (if its still there...!),
remove the rear sprocket,
slacken off and leave loose the chain tensioners,
put new front sprocket on,
put new washer and bigger sprocket nut on (if there is any thread left...!)
put rear sprocket on and tighten in a 2-8-10-4-9-3 (clock face) stylee,
soak chain in motor oil for a couple of hours, pat dry,
feed new chain on,
rivet up (not sure how to do this without a chain riveter?!)
check tension,
adjust and check at several points,
tighten down chain tentioners,
torque up front sprocket and rear sprocket bolts,
put front sprocket cover back on,
torque up cover,
take for a spin and pray that the clunking I was hearing was the duff chain and nothing else!
Anything I've missed / shouldn't be doing?