Until you start looking into it mate theres not much more we can do, all the will in the world wont make it fix itself. Give it a little look at and tell us what you find, then we can take it from there. Check your air filter and fuel filter for starters
Not made the mistake of leaving the fuel tap on reserve have you? Lmao your not a biker until you've pulled that stunt!
Check to make sure your Spark Plug's HT Leads are on correctly. Cat decided to go onto three cylinders as my Number 4 HT lead popped off. It was only when I was chatting to someone did I learn that you're supposed to take the nipples off the top of the spark plugs Since removing them, she's been as sweet as a nut