X9 500 i.e. does not start?? Injection nozzle? or gasoline pump? who knows advice?

Good day to all screwdrivers and scooter friends! My scooter has 48000 km on it, EZ: 2002 Injection! Where can I find the injection nozzle and de#ie petrol pump? under which disguise they hide? Spark plug has spark and if I inject gasoline into the spark plug opening (cylinder head) Spark plug in, then it starts briefly, but goes out immediately, if gasoline consumes. Ergo few seconds! My idea would be to pull off the petrol hose at the gasoline pump, check, od there gasoline rough if yes, it wouldn’t be the pump. Then I would have to invest a new injection nozzle for € 54,-, then it should run again, right? Greeting ramdo0035