Hey all, recently purchased a 56 plate Derbi senda 50, I think it has some sort of fuelling issue as it wont start without some fuel in the head, it will burn the fuel in the head then die, previous owner has messed with the carb (why oh why) so I'm thinking this has something to do with it. there's no fuel tap it has a vacuum thing, doesn't seem blocked as when you manually suck the bottom pipe fuel comes out the top pipe to the carb, when you kick it over no fuel comes out or does this only happen when the bike is running? why cant bikes be simple like they use to be lol my 49 year old Lambretta starts first kick and this Derbi crock of sh*t wont run for toffee, any help or advice much appreciated thanks and sorry for waffling on