thankyou for your quick reply,this looks a very handy site to have.will be ordering a few spares as i use the bike every work day ,and done about 1,00 miles on it .great fun
you should put the clutch plate back on and see if it still engages. your clutch might be toast. you said you took off the sproket with out pulling the clutch pin and ball bearing out first. id check it before ordering another sproket