hey . all you really need to it get the barrel re-bored if theres enuff left onit ull get the piston to fit it will cost you about 50quid and get a new gasket set as well its not a hard job so dont worrie bout it lol
if its none of them id try just puting the bike in 2nd gear hold the clutch in n push it n let the clutch out see it gos like that mate other than that i really dont no lol
when you put your bike in to gear with the stand down it will cut out but it the switch thing on the stand is broke it obv wont work just get it in to a local garage if you dont no wot your doing lol